./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix006_tso.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix006_tso.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/mix006_tso.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix006_tso.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 14:36:53,756 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 14:36:53,851 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 14:36:53,856 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 14:36:53,857 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 14:36:53,896 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 14:36:53,897 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 14:36:53,897 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 14:36:53,898 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 14:36:53,903 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 14:36:53,903 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 14:36:53,904 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 14:36:53,905 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 14:36:53,907 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 14:36:53,907 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 14:36:53,907 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 14:36:53,908 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 14:36:53,908 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 14:36:53,908 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 14:36:53,908 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 14:36:53,910 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 14:36:53,910 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 14:36:53,911 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 14:36:53,911 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 14:36:53,911 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 14:36:53,912 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 14:36:53,912 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 14:36:53,912 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 14:36:53,913 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 14:36:53,913 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 14:36:53,914 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 14:36:53,914 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 14:36:53,914 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:36:53,915 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 14:36:53,915 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 14:36:53,915 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 14:36:53,915 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 14:36:53,915 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 14:36:53,916 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 14:36:53,916 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 14:36:53,916 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 14:36:53,916 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 14:36:53,917 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 14:36:53,917 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 14:36:54,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 14:36:54,166 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 14:36:54,169 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 14:36:54,170 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 14:36:54,171 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 14:36:54,172 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix006_tso.oepc.yml/witness.yml [2024-06-04 14:36:54,408 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 14:36:54,409 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 14:36:54,410 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix006_tso.oepc.i [2024-06-04 14:36:55,582 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 14:36:55,843 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 14:36:55,845 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix006_tso.oepc.i [2024-06-04 14:36:55,866 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49ca77d37/df61ec573f7a4bfe9928f1e906c779cd/FLAGbc29a6e6e [2024-06-04 14:36:55,878 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49ca77d37/df61ec573f7a4bfe9928f1e906c779cd [2024-06-04 14:36:55,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 14:36:55,880 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 14:36:55,881 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 14:36:55,881 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 14:36:55,886 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 14:36:55,887 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:36:54" (1/2) ... [2024-06-04 14:36:55,888 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2794d3e7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:36:55, skipping insertion in model container [2024-06-04 14:36:55,888 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:36:54" (1/2) ... [2024-06-04 14:36:55,889 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@34c0f7cc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:36:55, skipping insertion in model container [2024-06-04 14:36:55,889 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:36:55" (2/2) ... [2024-06-04 14:36:55,889 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2794d3e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:36:55, skipping insertion in model container [2024-06-04 14:36:55,890 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:36:55" (2/2) ... [2024-06-04 14:36:55,890 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 14:36:56,064 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 14:36:56,065 INFO L97 edCorrectnessWitness]: Location invariant before [L904-L904] (((((((((((((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0) [2024-06-04 14:36:56,066 INFO L97 edCorrectnessWitness]: Location invariant before [L902-L902] (((((((((((((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0) [2024-06-04 14:36:56,066 INFO L97 edCorrectnessWitness]: Location invariant before [L905-L905] (((((((((((((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0) [2024-06-04 14:36:56,066 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 14:36:56,066 INFO L106 edCorrectnessWitness]: ghost_update [L900-L900] multithreaded = 1; [2024-06-04 14:36:56,113 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 14:36:56,572 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:36:56,583 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 14:36:56,752 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:36:56,808 INFO L206 MainTranslator]: Completed translation [2024-06-04 14:36:56,808 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:36:56 WrapperNode [2024-06-04 14:36:56,809 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 14:36:56,810 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 14:36:56,810 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 14:36:56,810 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 14:36:56,817 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:36:56" (1/1) ... [2024-06-04 14:36:56,851 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:36:56" (1/1) ... [2024-06-04 14:36:56,910 INFO L138 Inliner]: procedures = 175, calls = 48, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 271 [2024-06-04 14:36:56,911 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 14:36:56,912 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 14:36:56,912 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 14:36:56,912 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 14:36:56,923 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:36:56" (1/1) ... [2024-06-04 14:36:56,923 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:36:56" (1/1) ... [2024-06-04 14:36:56,930 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:36:56" (1/1) ... [2024-06-04 14:36:56,960 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-04 14:36:56,961 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:36:56" (1/1) ... [2024-06-04 14:36:56,961 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:36:56" (1/1) ... [2024-06-04 14:36:56,990 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:36:56" (1/1) ... [2024-06-04 14:36:56,992 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:36:56" (1/1) ... [2024-06-04 14:36:56,996 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:36:56" (1/1) ... [2024-06-04 14:36:56,998 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:36:56" (1/1) ... [2024-06-04 14:36:57,011 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 14:36:57,012 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 14:36:57,024 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 14:36:57,025 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 14:36:57,026 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:36:56" (1/1) ... [2024-06-04 14:36:57,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:36:57,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 14:36:57,050 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) [2024-06-04 14:36:57,068 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 [2024-06-04 14:36:57,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 14:36:57,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 14:36:57,082 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 14:36:57,082 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 14:36:57,082 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 14:36:57,083 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 14:36:57,083 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 14:36:57,084 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 14:36:57,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 14:36:57,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 14:36:57,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 14:36:57,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 14:36:57,087 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 14:36:57,212 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 14:36:57,214 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 14:36:57,868 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 14:36:57,870 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 14:36:58,142 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 14:36:58,143 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 14:36:58,143 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:36:58 BoogieIcfgContainer [2024-06-04 14:36:58,143 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 14:36:58,146 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 14:36:58,146 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 14:36:58,149 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 14:36:58,149 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:36:54" (1/4) ... [2024-06-04 14:36:58,150 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@365bf84f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:36:58, skipping insertion in model container [2024-06-04 14:36:58,150 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 02:36:55" (2/4) ... [2024-06-04 14:36:58,155 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@365bf84f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:36:58, skipping insertion in model container [2024-06-04 14:36:58,155 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:36:56" (3/4) ... [2024-06-04 14:36:58,156 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@365bf84f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:36:58, skipping insertion in model container [2024-06-04 14:36:58,156 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:36:58" (4/4) ... [2024-06-04 14:36:58,157 INFO L112 eAbstractionObserver]: Analyzing ICFG mix006_tso.oepc.i [2024-06-04 14:36:58,202 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 14:36:58,210 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 14:36:58,210 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 14:36:58,335 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 14:36:58,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-04 14:36:58,405 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-04 14:36:58,405 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:36:58,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 67 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 14:36:58,407 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-04 14:36:58,411 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-04 14:36:58,421 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 14:36:58,431 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;@7d895d39, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 14:36:58,431 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 14:36:58,437 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 14:36:58,437 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 14:36:58,437 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:36:58,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:36:58,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 14:36:58,438 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:36:58,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:36:58,443 INFO L85 PathProgramCache]: Analyzing trace with hash 971468398, now seen corresponding path program 1 times [2024-06-04 14:36:58,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:36:58,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341575589] [2024-06-04 14:36:58,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:36:58,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:36:58,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:37:00,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:37:00,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:37:00,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341575589] [2024-06-04 14:37:00,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341575589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:37:00,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:37:00,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 14:37:00,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874827349] [2024-06-04 14:37:00,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:37:00,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 14:37:00,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:37:00,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 14:37:00,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 14:37:00,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 14:37:01,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:01,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:37:01,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 14:37:01,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:37:01,827 INFO L124 PetriNetUnfolderBase]: 1955/2966 cut-off events. [2024-06-04 14:37:01,827 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2024-06-04 14:37:01,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5972 conditions, 2966 events. 1955/2966 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14196 event pairs, 1404 based on Foata normal form. 1/2877 useless extension candidates. Maximal degree in co-relation 5957. Up to 2893 conditions per place. [2024-06-04 14:37:01,849 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 36 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-04 14:37:01,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 183 flow [2024-06-04 14:37:01,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 14:37:01,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 14:37:01,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-06-04 14:37:01,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426356589147286 [2024-06-04 14:37:01,862 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 70 transitions. [2024-06-04 14:37:01,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 183 flow [2024-06-04 14:37:01,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 178 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 14:37:01,867 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-04 14:37:01,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-04 14:37:01,872 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-04 14:37:01,872 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-04 14:37:01,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:01,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:37:01,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:37:01,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 14:37:01,873 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:37:01,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:37:01,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1573251853, now seen corresponding path program 1 times [2024-06-04 14:37:01,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:37:01,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567456446] [2024-06-04 14:37:01,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:37:01,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:37:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:37:03,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:37:03,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:37:03,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567456446] [2024-06-04 14:37:03,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567456446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:37:03,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:37:03,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 14:37:03,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873261933] [2024-06-04 14:37:03,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:37:03,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 14:37:03,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:37:03,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 14:37:03,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 14:37:04,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-04 14:37:04,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:04,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:37:04,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-04 14:37:04,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:37:04,820 INFO L124 PetriNetUnfolderBase]: 2246/3320 cut-off events. [2024-06-04 14:37:04,820 INFO L125 PetriNetUnfolderBase]: For 621/621 co-relation queries the response was YES. [2024-06-04 14:37:04,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7537 conditions, 3320 events. 2246/3320 cut-off events. For 621/621 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 15360 event pairs, 1443 based on Foata normal form. 3/3321 useless extension candidates. Maximal degree in co-relation 7522. Up to 3292 conditions per place. [2024-06-04 14:37:04,838 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 44 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-04 14:37:04,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 252 flow [2024-06-04 14:37:04,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:37:04,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:37:04,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-06-04 14:37:04,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-04 14:37:04,842 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 86 transitions. [2024-06-04 14:37:04,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 252 flow [2024-06-04 14:37:04,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 14:37:04,847 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-04 14:37:04,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-04 14:37:04,848 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-04 14:37:04,848 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-04 14:37:04,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:04,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:37:04,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:37:04,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 14:37:04,851 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:37:04,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:37:04,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1526168017, now seen corresponding path program 1 times [2024-06-04 14:37:04,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:37:04,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777918418] [2024-06-04 14:37:04,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:37:04,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:37:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:37:07,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:37:07,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:37:07,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777918418] [2024-06-04 14:37:07,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777918418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:37:07,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:37:07,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:37:07,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43549067] [2024-06-04 14:37:07,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:37:07,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:37:07,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:37:07,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:37:07,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:37:07,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-04 14:37:07,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:07,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:37:07,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-04 14:37:07,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:37:08,031 INFO L124 PetriNetUnfolderBase]: 2234/3302 cut-off events. [2024-06-04 14:37:08,031 INFO L125 PetriNetUnfolderBase]: For 1740/1740 co-relation queries the response was YES. [2024-06-04 14:37:08,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8269 conditions, 3302 events. 2234/3302 cut-off events. For 1740/1740 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 15256 event pairs, 1059 based on Foata normal form. 6/3306 useless extension candidates. Maximal degree in co-relation 8252. Up to 3244 conditions per place. [2024-06-04 14:37:08,058 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 52 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-04 14:37:08,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 65 transitions, 334 flow [2024-06-04 14:37:08,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:37:08,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:37:08,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-06-04 14:37:08,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-04 14:37:08,067 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 105 transitions. [2024-06-04 14:37:08,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 65 transitions, 334 flow [2024-06-04 14:37:08,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 65 transitions, 320 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-04 14:37:08,071 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 176 flow [2024-06-04 14:37:08,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-04 14:37:08,073 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2024-06-04 14:37:08,073 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 176 flow [2024-06-04 14:37:08,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:08,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:37:08,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:37:08,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 14:37:08,074 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:37:08,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:37:08,075 INFO L85 PathProgramCache]: Analyzing trace with hash 2063643984, now seen corresponding path program 1 times [2024-06-04 14:37:08,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:37:08,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121160754] [2024-06-04 14:37:08,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:37:08,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:37:08,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:37:11,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:37:11,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:37:11,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121160754] [2024-06-04 14:37:11,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121160754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:37:11,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:37:11,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:37:11,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741780820] [2024-06-04 14:37:11,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:37:11,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:37:11,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:37:11,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:37:11,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:37:11,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-04 14:37:11,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 176 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:11,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:37:11,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-04 14:37:11,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:37:12,828 INFO L124 PetriNetUnfolderBase]: 2225/3287 cut-off events. [2024-06-04 14:37:12,828 INFO L125 PetriNetUnfolderBase]: For 3244/3244 co-relation queries the response was YES. [2024-06-04 14:37:12,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8983 conditions, 3287 events. 2225/3287 cut-off events. For 3244/3244 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 15133 event pairs, 846 based on Foata normal form. 6/3291 useless extension candidates. Maximal degree in co-relation 8965. Up to 3199 conditions per place. [2024-06-04 14:37:12,852 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 56 selfloop transitions, 12 changer transitions 0/71 dead transitions. [2024-06-04 14:37:12,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 71 transitions, 388 flow [2024-06-04 14:37:12,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:37:12,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:37:12,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-04 14:37:12,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-04 14:37:12,855 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 176 flow. Second operand 6 states and 119 transitions. [2024-06-04 14:37:12,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 71 transitions, 388 flow [2024-06-04 14:37:12,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 71 transitions, 364 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-04 14:37:12,861 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 195 flow [2024-06-04 14:37:12,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=195, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2024-06-04 14:37:12,863 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-04 14:37:12,863 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 195 flow [2024-06-04 14:37:12,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:12,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:37:12,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:37:12,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 14:37:12,865 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:37:12,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:37:12,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1938614126, now seen corresponding path program 1 times [2024-06-04 14:37:12,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:37:12,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492429046] [2024-06-04 14:37:12,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:37:12,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:37:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:37:14,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:37:14,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:37:14,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492429046] [2024-06-04 14:37:14,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492429046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:37:14,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:37:14,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:37:14,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372923781] [2024-06-04 14:37:14,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:37:14,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:37:14,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:37:14,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:37:14,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:37:14,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-04 14:37:14,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 195 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:14,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:37:14,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-04 14:37:14,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:37:15,631 INFO L124 PetriNetUnfolderBase]: 1923/2929 cut-off events. [2024-06-04 14:37:15,631 INFO L125 PetriNetUnfolderBase]: For 4285/4285 co-relation queries the response was YES. [2024-06-04 14:37:15,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8427 conditions, 2929 events. 1923/2929 cut-off events. For 4285/4285 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14038 event pairs, 990 based on Foata normal form. 2/2893 useless extension candidates. Maximal degree in co-relation 8408. Up to 2835 conditions per place. [2024-06-04 14:37:15,649 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 46 selfloop transitions, 8 changer transitions 0/58 dead transitions. [2024-06-04 14:37:15,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 58 transitions, 347 flow [2024-06-04 14:37:15,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:37:15,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:37:15,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-04 14:37:15,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40930232558139534 [2024-06-04 14:37:15,652 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 195 flow. Second operand 5 states and 88 transitions. [2024-06-04 14:37:15,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 58 transitions, 347 flow [2024-06-04 14:37:15,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 58 transitions, 314 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-04 14:37:15,660 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 208 flow [2024-06-04 14:37:15,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=208, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-04 14:37:15,662 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-04 14:37:15,663 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 208 flow [2024-06-04 14:37:15,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:15,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:37:15,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:37:15,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 14:37:15,665 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:37:15,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:37:15,666 INFO L85 PathProgramCache]: Analyzing trace with hash -18203332, now seen corresponding path program 1 times [2024-06-04 14:37:15,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:37:15,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893061727] [2024-06-04 14:37:15,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:37:15,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:37:15,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:37:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:37:17,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:37:17,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893061727] [2024-06-04 14:37:17,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893061727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:37:17,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:37:17,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:37:17,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272704904] [2024-06-04 14:37:17,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:37:17,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:37:17,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:37:17,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:37:17,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:37:18,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-04 14:37:18,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 208 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:18,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:37:18,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-04 14:37:18,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:37:18,853 INFO L124 PetriNetUnfolderBase]: 1908/2922 cut-off events. [2024-06-04 14:37:18,853 INFO L125 PetriNetUnfolderBase]: For 6168/6168 co-relation queries the response was YES. [2024-06-04 14:37:18,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8933 conditions, 2922 events. 1908/2922 cut-off events. For 6168/6168 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14094 event pairs, 936 based on Foata normal form. 6/2916 useless extension candidates. Maximal degree in co-relation 8912. Up to 2787 conditions per place. [2024-06-04 14:37:18,873 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 52 selfloop transitions, 11 changer transitions 0/67 dead transitions. [2024-06-04 14:37:18,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 67 transitions, 396 flow [2024-06-04 14:37:18,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:37:18,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:37:18,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-04 14:37:18,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-04 14:37:18,875 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 208 flow. Second operand 6 states and 105 transitions. [2024-06-04 14:37:18,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 67 transitions, 396 flow [2024-06-04 14:37:18,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 67 transitions, 374 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-04 14:37:18,880 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 242 flow [2024-06-04 14:37:18,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=242, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-06-04 14:37:18,883 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2024-06-04 14:37:18,884 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 242 flow [2024-06-04 14:37:18,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:18,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:37:18,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:37:18,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 14:37:18,885 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:37:18,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:37:18,885 INFO L85 PathProgramCache]: Analyzing trace with hash -555580061, now seen corresponding path program 1 times [2024-06-04 14:37:18,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:37:18,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128088993] [2024-06-04 14:37:18,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:37:18,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:37:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:37:20,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:37:20,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:37:20,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128088993] [2024-06-04 14:37:20,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128088993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:37:20,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:37:20,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:37:20,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681215908] [2024-06-04 14:37:20,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:37:20,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:37:20,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:37:20,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:37:20,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:37:20,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:37:20,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 242 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:20,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:37:20,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:37:20,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:37:21,907 INFO L124 PetriNetUnfolderBase]: 2216/3275 cut-off events. [2024-06-04 14:37:21,908 INFO L125 PetriNetUnfolderBase]: For 9378/9378 co-relation queries the response was YES. [2024-06-04 14:37:21,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10873 conditions, 3275 events. 2216/3275 cut-off events. For 9378/9378 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15076 event pairs, 1113 based on Foata normal form. 2/3275 useless extension candidates. Maximal degree in co-relation 10851. Up to 3238 conditions per place. [2024-06-04 14:37:21,922 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 57 selfloop transitions, 11 changer transitions 0/71 dead transitions. [2024-06-04 14:37:21,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 71 transitions, 446 flow [2024-06-04 14:37:21,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:37:21,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:37:21,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-04 14:37:21,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39147286821705424 [2024-06-04 14:37:21,924 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 242 flow. Second operand 6 states and 101 transitions. [2024-06-04 14:37:21,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 71 transitions, 446 flow [2024-06-04 14:37:21,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 414 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-04 14:37:21,928 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 268 flow [2024-06-04 14:37:21,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=268, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-04 14:37:21,929 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-04 14:37:21,929 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 268 flow [2024-06-04 14:37:21,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:21,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:37:21,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:37:21,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 14:37:21,930 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:37:21,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:37:21,931 INFO L85 PathProgramCache]: Analyzing trace with hash 917853235, now seen corresponding path program 2 times [2024-06-04 14:37:21,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:37:21,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920371540] [2024-06-04 14:37:21,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:37:21,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:37:21,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:37:23,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:37:23,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:37:23,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920371540] [2024-06-04 14:37:23,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920371540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:37:23,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:37:23,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:37:23,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466049424] [2024-06-04 14:37:23,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:37:23,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:37:23,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:37:23,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:37:23,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:37:23,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:37:23,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 268 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:23,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:37:23,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:37:23,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:37:24,653 INFO L124 PetriNetUnfolderBase]: 2211/3270 cut-off events. [2024-06-04 14:37:24,653 INFO L125 PetriNetUnfolderBase]: For 12160/12170 co-relation queries the response was YES. [2024-06-04 14:37:24,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11502 conditions, 3270 events. 2211/3270 cut-off events. For 12160/12170 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15076 event pairs, 1120 based on Foata normal form. 10/3277 useless extension candidates. Maximal degree in co-relation 11479. Up to 3213 conditions per place. [2024-06-04 14:37:24,672 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 52 selfloop transitions, 16 changer transitions 0/71 dead transitions. [2024-06-04 14:37:24,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 71 transitions, 470 flow [2024-06-04 14:37:24,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:37:24,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:37:24,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-04 14:37:24,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-04 14:37:24,673 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 268 flow. Second operand 6 states and 100 transitions. [2024-06-04 14:37:24,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 71 transitions, 470 flow [2024-06-04 14:37:24,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 71 transitions, 436 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-04 14:37:24,679 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 308 flow [2024-06-04 14:37:24,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-06-04 14:37:24,682 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-04 14:37:24,683 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 308 flow [2024-06-04 14:37:24,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:24,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:37:24,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:37:24,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 14:37:24,684 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:37:24,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:37:24,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1493441855, now seen corresponding path program 1 times [2024-06-04 14:37:24,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:37:24,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434656504] [2024-06-04 14:37:24,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:37:24,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:37:24,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:37:26,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:37:26,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:37:26,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434656504] [2024-06-04 14:37:26,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434656504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:37:26,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:37:26,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:37:26,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324030453] [2024-06-04 14:37:26,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:37:26,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:37:26,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:37:26,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:37:26,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:37:26,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:37:26,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 308 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:26,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:37:26,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:37:26,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:37:27,539 INFO L124 PetriNetUnfolderBase]: 2281/3378 cut-off events. [2024-06-04 14:37:27,539 INFO L125 PetriNetUnfolderBase]: For 15837/15841 co-relation queries the response was YES. [2024-06-04 14:37:27,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12587 conditions, 3378 events. 2281/3378 cut-off events. For 15837/15841 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15542 event pairs, 945 based on Foata normal form. 8/3384 useless extension candidates. Maximal degree in co-relation 12563. Up to 3258 conditions per place. [2024-06-04 14:37:27,562 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 72 selfloop transitions, 24 changer transitions 0/99 dead transitions. [2024-06-04 14:37:27,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 99 transitions, 656 flow [2024-06-04 14:37:27,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:37:27,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:37:27,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-04 14:37:27,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-04 14:37:27,564 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 308 flow. Second operand 8 states and 136 transitions. [2024-06-04 14:37:27,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 99 transitions, 656 flow [2024-06-04 14:37:27,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 99 transitions, 600 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-04 14:37:27,572 INFO L231 Difference]: Finished difference. Result has 67 places, 70 transitions, 423 flow [2024-06-04 14:37:27,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=423, PETRI_PLACES=67, PETRI_TRANSITIONS=70} [2024-06-04 14:37:27,573 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 23 predicate places. [2024-06-04 14:37:27,573 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 70 transitions, 423 flow [2024-06-04 14:37:27,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:27,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:37:27,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:37:27,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 14:37:27,574 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:37:27,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:37:27,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1616081347, now seen corresponding path program 2 times [2024-06-04 14:37:27,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:37:27,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299732273] [2024-06-04 14:37:27,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:37:27,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:37:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:37:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:37:29,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:37:29,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299732273] [2024-06-04 14:37:29,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299732273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:37:29,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:37:29,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:37:29,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112710188] [2024-06-04 14:37:29,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:37:29,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:37:29,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:37:29,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:37:29,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:37:29,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:37:29,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 70 transitions, 423 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:29,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:37:29,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:37:29,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:37:30,649 INFO L124 PetriNetUnfolderBase]: 2303/3410 cut-off events. [2024-06-04 14:37:30,649 INFO L125 PetriNetUnfolderBase]: For 20155/20161 co-relation queries the response was YES. [2024-06-04 14:37:30,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13822 conditions, 3410 events. 2303/3410 cut-off events. For 20155/20161 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15690 event pairs, 924 based on Foata normal form. 10/3418 useless extension candidates. Maximal degree in co-relation 13794. Up to 3267 conditions per place. [2024-06-04 14:37:30,666 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 70 selfloop transitions, 31 changer transitions 0/104 dead transitions. [2024-06-04 14:37:30,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 104 transitions, 779 flow [2024-06-04 14:37:30,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:37:30,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:37:30,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-04 14:37:30,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-04 14:37:30,668 INFO L175 Difference]: Start difference. First operand has 67 places, 70 transitions, 423 flow. Second operand 7 states and 120 transitions. [2024-06-04 14:37:30,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 104 transitions, 779 flow [2024-06-04 14:37:30,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 104 transitions, 728 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-04 14:37:30,680 INFO L231 Difference]: Finished difference. Result has 72 places, 78 transitions, 533 flow [2024-06-04 14:37:30,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=533, PETRI_PLACES=72, PETRI_TRANSITIONS=78} [2024-06-04 14:37:30,683 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 28 predicate places. [2024-06-04 14:37:30,683 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 78 transitions, 533 flow [2024-06-04 14:37:30,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:30,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:37:30,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:37:30,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 14:37:30,684 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:37:30,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:37:30,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1347960803, now seen corresponding path program 1 times [2024-06-04 14:37:30,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:37:30,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710942007] [2024-06-04 14:37:30,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:37:30,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:37:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:37:32,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:37:32,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:37:32,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710942007] [2024-06-04 14:37:32,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710942007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:37:32,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:37:32,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:37:32,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564538123] [2024-06-04 14:37:32,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:37:32,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:37:32,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:37:32,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:37:32,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:37:33,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:37:33,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 78 transitions, 533 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:33,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:37:33,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:37:33,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:37:33,914 INFO L124 PetriNetUnfolderBase]: 2325/3442 cut-off events. [2024-06-04 14:37:33,914 INFO L125 PetriNetUnfolderBase]: For 25370/25378 co-relation queries the response was YES. [2024-06-04 14:37:33,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14931 conditions, 3442 events. 2325/3442 cut-off events. For 25370/25378 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15900 event pairs, 915 based on Foata normal form. 12/3452 useless extension candidates. Maximal degree in co-relation 14901. Up to 3371 conditions per place. [2024-06-04 14:37:33,926 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 85 selfloop transitions, 17 changer transitions 0/105 dead transitions. [2024-06-04 14:37:33,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 105 transitions, 847 flow [2024-06-04 14:37:33,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:37:33,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:37:33,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-04 14:37:33,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-04 14:37:33,927 INFO L175 Difference]: Start difference. First operand has 72 places, 78 transitions, 533 flow. Second operand 7 states and 116 transitions. [2024-06-04 14:37:33,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 105 transitions, 847 flow [2024-06-04 14:37:33,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 105 transitions, 781 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-04 14:37:33,937 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 547 flow [2024-06-04 14:37:33,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=547, PETRI_PLACES=76, PETRI_TRANSITIONS=81} [2024-06-04 14:37:33,937 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-04 14:37:33,937 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 547 flow [2024-06-04 14:37:33,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:33,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:37:33,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:37:33,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 14:37:33,938 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:37:33,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:37:33,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1615961377, now seen corresponding path program 3 times [2024-06-04 14:37:33,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:37:33,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891928548] [2024-06-04 14:37:33,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:37:33,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:37:33,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:37:35,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:37:35,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:37:35,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891928548] [2024-06-04 14:37:35,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891928548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:37:35,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:37:35,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:37:35,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784801817] [2024-06-04 14:37:35,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:37:35,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:37:35,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:37:35,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:37:35,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:37:36,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:37:36,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 81 transitions, 547 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:36,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:37:36,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:37:36,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:37:37,102 INFO L124 PetriNetUnfolderBase]: 2363/3498 cut-off events. [2024-06-04 14:37:37,102 INFO L125 PetriNetUnfolderBase]: For 25247/25247 co-relation queries the response was YES. [2024-06-04 14:37:37,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14995 conditions, 3498 events. 2363/3498 cut-off events. For 25247/25247 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16108 event pairs, 905 based on Foata normal form. 4/3500 useless extension candidates. Maximal degree in co-relation 14964. Up to 3306 conditions per place. [2024-06-04 14:37:37,116 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 73 selfloop transitions, 36 changer transitions 0/112 dead transitions. [2024-06-04 14:37:37,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 112 transitions, 957 flow [2024-06-04 14:37:37,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:37:37,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:37:37,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-04 14:37:37,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-04 14:37:37,118 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 547 flow. Second operand 7 states and 122 transitions. [2024-06-04 14:37:37,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 112 transitions, 957 flow [2024-06-04 14:37:37,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 112 transitions, 903 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-04 14:37:37,131 INFO L231 Difference]: Finished difference. Result has 78 places, 87 transitions, 655 flow [2024-06-04 14:37:37,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=655, PETRI_PLACES=78, PETRI_TRANSITIONS=87} [2024-06-04 14:37:37,131 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-06-04 14:37:37,132 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 87 transitions, 655 flow [2024-06-04 14:37:37,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:37,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:37:37,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:37:37,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 14:37:37,133 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:37:37,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:37:37,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1170829469, now seen corresponding path program 4 times [2024-06-04 14:37:37,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:37:37,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915883282] [2024-06-04 14:37:37,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:37:37,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:37:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:37:39,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:37:39,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:37:39,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915883282] [2024-06-04 14:37:39,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915883282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:37:39,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:37:39,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:37:39,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263815597] [2024-06-04 14:37:39,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:37:39,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:37:39,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:37:39,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:37:39,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:37:39,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:37:39,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 87 transitions, 655 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:39,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:37:39,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:37:39,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:37:39,966 INFO L124 PetriNetUnfolderBase]: 2353/3487 cut-off events. [2024-06-04 14:37:39,966 INFO L125 PetriNetUnfolderBase]: For 30253/30266 co-relation queries the response was YES. [2024-06-04 14:37:39,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15638 conditions, 3487 events. 2353/3487 cut-off events. For 30253/30266 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16154 event pairs, 915 based on Foata normal form. 10/3492 useless extension candidates. Maximal degree in co-relation 15606. Up to 3256 conditions per place. [2024-06-04 14:37:39,979 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 67 selfloop transitions, 43 changer transitions 0/113 dead transitions. [2024-06-04 14:37:39,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 113 transitions, 1033 flow [2024-06-04 14:37:39,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:37:39,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:37:39,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-04 14:37:39,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-04 14:37:39,980 INFO L175 Difference]: Start difference. First operand has 78 places, 87 transitions, 655 flow. Second operand 7 states and 121 transitions. [2024-06-04 14:37:39,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 113 transitions, 1033 flow [2024-06-04 14:37:39,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 113 transitions, 978 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-04 14:37:39,995 INFO L231 Difference]: Finished difference. Result has 82 places, 90 transitions, 744 flow [2024-06-04 14:37:39,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=744, PETRI_PLACES=82, PETRI_TRANSITIONS=90} [2024-06-04 14:37:39,996 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 38 predicate places. [2024-06-04 14:37:39,996 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 90 transitions, 744 flow [2024-06-04 14:37:39,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:39,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:37:39,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:37:39,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 14:37:39,997 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:37:39,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:37:39,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1611319561, now seen corresponding path program 2 times [2024-06-04 14:37:39,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:37:39,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842742149] [2024-06-04 14:37:39,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:37:39,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:37:40,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:37:42,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:37:42,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:37:42,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842742149] [2024-06-04 14:37:42,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842742149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:37:42,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:37:42,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:37:42,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242446610] [2024-06-04 14:37:42,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:37:42,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:37:42,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:37:42,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:37:42,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:37:42,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:37:42,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 90 transitions, 744 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:42,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:37:42,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:37:42,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:37:42,939 INFO L124 PetriNetUnfolderBase]: 2386/3532 cut-off events. [2024-06-04 14:37:42,939 INFO L125 PetriNetUnfolderBase]: For 35929/35948 co-relation queries the response was YES. [2024-06-04 14:37:42,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16681 conditions, 3532 events. 2386/3532 cut-off events. For 35929/35948 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16285 event pairs, 907 based on Foata normal form. 22/3550 useless extension candidates. Maximal degree in co-relation 16647. Up to 3433 conditions per place. [2024-06-04 14:37:42,957 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 91 selfloop transitions, 22 changer transitions 0/116 dead transitions. [2024-06-04 14:37:42,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 116 transitions, 1086 flow [2024-06-04 14:37:42,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:37:42,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:37:42,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-04 14:37:42,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-04 14:37:42,958 INFO L175 Difference]: Start difference. First operand has 82 places, 90 transitions, 744 flow. Second operand 7 states and 116 transitions. [2024-06-04 14:37:42,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 116 transitions, 1086 flow [2024-06-04 14:37:42,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 116 transitions, 966 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-04 14:37:42,977 INFO L231 Difference]: Finished difference. Result has 84 places, 93 transitions, 722 flow [2024-06-04 14:37:42,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=722, PETRI_PLACES=84, PETRI_TRANSITIONS=93} [2024-06-04 14:37:42,977 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-06-04 14:37:42,977 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 93 transitions, 722 flow [2024-06-04 14:37:42,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:42,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:37:42,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:37:42,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 14:37:42,978 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:37:42,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:37:42,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1170592133, now seen corresponding path program 3 times [2024-06-04 14:37:42,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:37:42,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846182262] [2024-06-04 14:37:42,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:37:42,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:37:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:37:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:37:45,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:37:45,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846182262] [2024-06-04 14:37:45,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846182262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:37:45,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:37:45,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:37:45,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235092294] [2024-06-04 14:37:45,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:37:45,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:37:45,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:37:45,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:37:45,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:37:45,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:37:45,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 93 transitions, 722 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:45,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:37:45,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:37:45,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:37:46,103 INFO L124 PetriNetUnfolderBase]: 2387/3534 cut-off events. [2024-06-04 14:37:46,103 INFO L125 PetriNetUnfolderBase]: For 40105/40124 co-relation queries the response was YES. [2024-06-04 14:37:46,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17178 conditions, 3534 events. 2387/3534 cut-off events. For 40105/40124 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16406 event pairs, 816 based on Foata normal form. 22/3552 useless extension candidates. Maximal degree in co-relation 17143. Up to 3342 conditions per place. [2024-06-04 14:37:46,122 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 91 selfloop transitions, 32 changer transitions 0/126 dead transitions. [2024-06-04 14:37:46,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 126 transitions, 1198 flow [2024-06-04 14:37:46,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:37:46,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:37:46,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-04 14:37:46,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-04 14:37:46,123 INFO L175 Difference]: Start difference. First operand has 84 places, 93 transitions, 722 flow. Second operand 7 states and 121 transitions. [2024-06-04 14:37:46,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 126 transitions, 1198 flow [2024-06-04 14:37:46,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 126 transitions, 1128 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-04 14:37:46,181 INFO L231 Difference]: Finished difference. Result has 86 places, 99 transitions, 822 flow [2024-06-04 14:37:46,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=822, PETRI_PLACES=86, PETRI_TRANSITIONS=99} [2024-06-04 14:37:46,182 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 42 predicate places. [2024-06-04 14:37:46,182 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 99 transitions, 822 flow [2024-06-04 14:37:46,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:46,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:37:46,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:37:46,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 14:37:46,183 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:37:46,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:37:46,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1670174313, now seen corresponding path program 1 times [2024-06-04 14:37:46,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:37:46,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070504707] [2024-06-04 14:37:46,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:37:46,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:37:46,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:37:47,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:37:47,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:37:47,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070504707] [2024-06-04 14:37:47,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070504707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:37:47,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:37:47,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:37:47,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579512104] [2024-06-04 14:37:47,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:37:47,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:37:47,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:37:47,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:37:47,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:37:47,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-04 14:37:47,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 99 transitions, 822 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:47,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:37:47,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-04 14:37:47,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:37:48,569 INFO L124 PetriNetUnfolderBase]: 2087/3213 cut-off events. [2024-06-04 14:37:48,569 INFO L125 PetriNetUnfolderBase]: For 38071/38071 co-relation queries the response was YES. [2024-06-04 14:37:48,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15931 conditions, 3213 events. 2087/3213 cut-off events. For 38071/38071 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15508 event pairs, 778 based on Foata normal form. 1/3212 useless extension candidates. Maximal degree in co-relation 15895. Up to 3084 conditions per place. [2024-06-04 14:37:48,585 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 98 selfloop transitions, 8 changer transitions 0/110 dead transitions. [2024-06-04 14:37:48,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 110 transitions, 1078 flow [2024-06-04 14:37:48,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:37:48,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:37:48,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-06-04 14:37:48,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39069767441860465 [2024-06-04 14:37:48,587 INFO L175 Difference]: Start difference. First operand has 86 places, 99 transitions, 822 flow. Second operand 5 states and 84 transitions. [2024-06-04 14:37:48,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 110 transitions, 1078 flow [2024-06-04 14:37:48,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 110 transitions, 1018 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-04 14:37:48,608 INFO L231 Difference]: Finished difference. Result has 88 places, 102 transitions, 810 flow [2024-06-04 14:37:48,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=810, PETRI_PLACES=88, PETRI_TRANSITIONS=102} [2024-06-04 14:37:48,608 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-04 14:37:48,609 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 102 transitions, 810 flow [2024-06-04 14:37:48,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:37:48,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:37:48,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:37:48,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 14:37:48,609 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:37:48,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:37:48,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1335419184, now seen corresponding path program 1 times [2024-06-04 14:37:48,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:37:48,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831472170] [2024-06-04 14:37:48,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:37:48,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:37:48,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:37:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:37:50,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:37:50,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831472170] [2024-06-04 14:37:50,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831472170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:37:50,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:37:50,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:37:50,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304783587] [2024-06-04 14:37:50,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:37:50,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:37:50,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:37:50,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:37:50,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:37:50,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:37:50,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 102 transitions, 810 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 14:37:50,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:37:50,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:37:50,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:37:51,817 INFO L124 PetriNetUnfolderBase]: 2379/3522 cut-off events. [2024-06-04 14:37:51,817 INFO L125 PetriNetUnfolderBase]: For 46870/46876 co-relation queries the response was YES. [2024-06-04 14:37:51,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18247 conditions, 3522 events. 2379/3522 cut-off events. For 46870/46876 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16313 event pairs, 903 based on Foata normal form. 8/3528 useless extension candidates. Maximal degree in co-relation 18209. Up to 3365 conditions per place. [2024-06-04 14:37:51,835 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 93 selfloop transitions, 32 changer transitions 0/128 dead transitions. [2024-06-04 14:37:51,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 128 transitions, 1146 flow [2024-06-04 14:37:51,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:37:51,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:37:51,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-04 14:37:51,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-04 14:37:51,837 INFO L175 Difference]: Start difference. First operand has 88 places, 102 transitions, 810 flow. Second operand 7 states and 120 transitions. [2024-06-04 14:37:51,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 128 transitions, 1146 flow [2024-06-04 14:37:51,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 128 transitions, 1098 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-04 14:37:51,859 INFO L231 Difference]: Finished difference. Result has 92 places, 102 transitions, 844 flow [2024-06-04 14:37:51,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=844, PETRI_PLACES=92, PETRI_TRANSITIONS=102} [2024-06-04 14:37:51,859 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 48 predicate places. [2024-06-04 14:37:51,860 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 102 transitions, 844 flow [2024-06-04 14:37:51,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 14:37:51,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:37:51,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:37:51,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 14:37:51,860 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:37:51,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:37:51,861 INFO L85 PathProgramCache]: Analyzing trace with hash -2135419885, now seen corresponding path program 1 times [2024-06-04 14:37:51,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:37:51,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917168539] [2024-06-04 14:37:51,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:37:51,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:37:51,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:37:54,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:37:54,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:37:54,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917168539] [2024-06-04 14:37:54,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917168539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:37:54,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:37:54,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:37:54,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512159782] [2024-06-04 14:37:54,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:37:54,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:37:54,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:37:54,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:37:54,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:37:54,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:37:54,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 102 transitions, 844 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 14:37:54,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:37:54,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:37:54,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:37:55,191 INFO L124 PetriNetUnfolderBase]: 2423/3586 cut-off events. [2024-06-04 14:37:55,191 INFO L125 PetriNetUnfolderBase]: For 53645/53651 co-relation queries the response was YES. [2024-06-04 14:37:55,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18993 conditions, 3586 events. 2423/3586 cut-off events. For 53645/53651 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16657 event pairs, 882 based on Foata normal form. 14/3598 useless extension candidates. Maximal degree in co-relation 18954. Up to 3387 conditions per place. [2024-06-04 14:37:55,210 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 100 selfloop transitions, 34 changer transitions 0/137 dead transitions. [2024-06-04 14:37:55,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 137 transitions, 1260 flow [2024-06-04 14:37:55,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:37:55,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:37:55,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-04 14:37:55,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-04 14:37:55,212 INFO L175 Difference]: Start difference. First operand has 92 places, 102 transitions, 844 flow. Second operand 8 states and 136 transitions. [2024-06-04 14:37:55,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 137 transitions, 1260 flow [2024-06-04 14:37:55,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 137 transitions, 1187 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 14:37:55,236 INFO L231 Difference]: Finished difference. Result has 94 places, 105 transitions, 898 flow [2024-06-04 14:37:55,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=898, PETRI_PLACES=94, PETRI_TRANSITIONS=105} [2024-06-04 14:37:55,236 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 50 predicate places. [2024-06-04 14:37:55,237 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 105 transitions, 898 flow [2024-06-04 14:37:55,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 14:37:55,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:37:55,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:37:55,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 14:37:55,237 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:37:55,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:37:55,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1162883527, now seen corresponding path program 2 times [2024-06-04 14:37:55,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:37:55,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181106627] [2024-06-04 14:37:55,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:37:55,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:37:55,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:37:57,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:37:57,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:37:57,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181106627] [2024-06-04 14:37:57,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181106627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:37:57,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:37:57,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:37:57,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238886960] [2024-06-04 14:37:57,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:37:57,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:37:57,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:37:57,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:37:57,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:37:57,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:37:57,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 105 transitions, 898 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 14:37:57,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:37:57,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:37:57,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:37:58,539 INFO L124 PetriNetUnfolderBase]: 2467/3651 cut-off events. [2024-06-04 14:37:58,539 INFO L125 PetriNetUnfolderBase]: For 60951/60951 co-relation queries the response was YES. [2024-06-04 14:37:58,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20077 conditions, 3651 events. 2467/3651 cut-off events. For 60951/60951 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16957 event pairs, 899 based on Foata normal form. 8/3657 useless extension candidates. Maximal degree in co-relation 20037. Up to 3415 conditions per place. [2024-06-04 14:37:58,557 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 95 selfloop transitions, 39 changer transitions 0/137 dead transitions. [2024-06-04 14:37:58,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 137 transitions, 1306 flow [2024-06-04 14:37:58,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:37:58,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:37:58,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-04 14:37:58,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-04 14:37:58,559 INFO L175 Difference]: Start difference. First operand has 94 places, 105 transitions, 898 flow. Second operand 8 states and 136 transitions. [2024-06-04 14:37:58,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 137 transitions, 1306 flow [2024-06-04 14:37:58,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 137 transitions, 1205 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-04 14:37:58,590 INFO L231 Difference]: Finished difference. Result has 96 places, 108 transitions, 939 flow [2024-06-04 14:37:58,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=939, PETRI_PLACES=96, PETRI_TRANSITIONS=108} [2024-06-04 14:37:58,591 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 52 predicate places. [2024-06-04 14:37:58,591 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 108 transitions, 939 flow [2024-06-04 14:37:58,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 14:37:58,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:37:58,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:37:58,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 14:37:58,592 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:37:58,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:37:58,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1444811671, now seen corresponding path program 3 times [2024-06-04 14:37:58,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:37:58,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123633962] [2024-06-04 14:37:58,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:37:58,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:37:58,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:00,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:00,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:00,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123633962] [2024-06-04 14:38:00,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123633962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:00,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:00,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:38:00,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854715424] [2024-06-04 14:38:00,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:00,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:38:00,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:00,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:38:00,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:38:00,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:38:00,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 108 transitions, 939 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 14:38:00,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:00,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:38:00,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:01,899 INFO L124 PetriNetUnfolderBase]: 2571/3802 cut-off events. [2024-06-04 14:38:01,899 INFO L125 PetriNetUnfolderBase]: For 70529/70535 co-relation queries the response was YES. [2024-06-04 14:38:01,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21667 conditions, 3802 events. 2571/3802 cut-off events. For 70529/70535 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17737 event pairs, 911 based on Foata normal form. 18/3818 useless extension candidates. Maximal degree in co-relation 21626. Up to 3623 conditions per place. [2024-06-04 14:38:01,921 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 119 selfloop transitions, 26 changer transitions 0/148 dead transitions. [2024-06-04 14:38:01,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 148 transitions, 1523 flow [2024-06-04 14:38:01,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:38:01,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:38:01,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-04 14:38:01,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-04 14:38:01,923 INFO L175 Difference]: Start difference. First operand has 96 places, 108 transitions, 939 flow. Second operand 8 states and 138 transitions. [2024-06-04 14:38:01,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 148 transitions, 1523 flow [2024-06-04 14:38:01,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 148 transitions, 1405 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-04 14:38:01,954 INFO L231 Difference]: Finished difference. Result has 98 places, 115 transitions, 1011 flow [2024-06-04 14:38:01,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1011, PETRI_PLACES=98, PETRI_TRANSITIONS=115} [2024-06-04 14:38:01,954 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-06-04 14:38:01,954 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 115 transitions, 1011 flow [2024-06-04 14:38:01,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 14:38:01,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:01,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:01,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 14:38:01,955 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:38:01,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:01,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1135963789, now seen corresponding path program 4 times [2024-06-04 14:38:01,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:01,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63922990] [2024-06-04 14:38:01,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:01,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:01,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:04,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:04,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:04,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63922990] [2024-06-04 14:38:04,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63922990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:04,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:04,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:38:04,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722642470] [2024-06-04 14:38:04,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:04,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:38:04,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:04,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:38:04,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:38:04,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:38:04,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 115 transitions, 1011 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 14:38:04,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:04,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:38:04,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:05,233 INFO L124 PetriNetUnfolderBase]: 2669/3945 cut-off events. [2024-06-04 14:38:05,233 INFO L125 PetriNetUnfolderBase]: For 81070/81089 co-relation queries the response was YES. [2024-06-04 14:38:05,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23360 conditions, 3945 events. 2669/3945 cut-off events. For 81070/81089 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 18488 event pairs, 930 based on Foata normal form. 28/3969 useless extension candidates. Maximal degree in co-relation 23318. Up to 3753 conditions per place. [2024-06-04 14:38:05,255 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 122 selfloop transitions, 29 changer transitions 0/154 dead transitions. [2024-06-04 14:38:05,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 154 transitions, 1629 flow [2024-06-04 14:38:05,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:38:05,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:38:05,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-04 14:38:05,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-04 14:38:05,257 INFO L175 Difference]: Start difference. First operand has 98 places, 115 transitions, 1011 flow. Second operand 8 states and 137 transitions. [2024-06-04 14:38:05,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 154 transitions, 1629 flow [2024-06-04 14:38:05,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 154 transitions, 1551 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-04 14:38:05,288 INFO L231 Difference]: Finished difference. Result has 102 places, 122 transitions, 1142 flow [2024-06-04 14:38:05,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1142, PETRI_PLACES=102, PETRI_TRANSITIONS=122} [2024-06-04 14:38:05,288 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-04 14:38:05,288 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 122 transitions, 1142 flow [2024-06-04 14:38:05,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 14:38:05,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:05,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:05,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 14:38:05,289 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:38:05,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:05,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1935973945, now seen corresponding path program 5 times [2024-06-04 14:38:05,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:05,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139958935] [2024-06-04 14:38:05,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:05,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:05,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:07,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:07,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:07,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139958935] [2024-06-04 14:38:07,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139958935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:07,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:07,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:38:07,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796852978] [2024-06-04 14:38:07,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:07,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:38:07,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:07,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:38:07,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:38:07,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:38:07,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 122 transitions, 1142 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 14:38:07,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:07,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:38:07,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:08,541 INFO L124 PetriNetUnfolderBase]: 2713/4012 cut-off events. [2024-06-04 14:38:08,541 INFO L125 PetriNetUnfolderBase]: For 89532/89545 co-relation queries the response was YES. [2024-06-04 14:38:08,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24417 conditions, 4012 events. 2713/4012 cut-off events. For 89532/89545 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 18859 event pairs, 948 based on Foata normal form. 14/4021 useless extension candidates. Maximal degree in co-relation 24373. Up to 3737 conditions per place. [2024-06-04 14:38:08,567 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 103 selfloop transitions, 46 changer transitions 0/152 dead transitions. [2024-06-04 14:38:08,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 152 transitions, 1592 flow [2024-06-04 14:38:08,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:38:08,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:38:08,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-04 14:38:08,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-04 14:38:08,569 INFO L175 Difference]: Start difference. First operand has 102 places, 122 transitions, 1142 flow. Second operand 8 states and 135 transitions. [2024-06-04 14:38:08,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 152 transitions, 1592 flow [2024-06-04 14:38:08,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 152 transitions, 1494 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-04 14:38:08,620 INFO L231 Difference]: Finished difference. Result has 106 places, 125 transitions, 1218 flow [2024-06-04 14:38:08,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1218, PETRI_PLACES=106, PETRI_TRANSITIONS=125} [2024-06-04 14:38:08,621 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 62 predicate places. [2024-06-04 14:38:08,621 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 125 transitions, 1218 flow [2024-06-04 14:38:08,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 14:38:08,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:08,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:08,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 14:38:08,622 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:38:08,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:08,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1928616715, now seen corresponding path program 6 times [2024-06-04 14:38:08,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:08,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031891477] [2024-06-04 14:38:08,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:08,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:10,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:10,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:10,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031891477] [2024-06-04 14:38:10,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031891477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:10,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:10,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:38:10,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879994741] [2024-06-04 14:38:10,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:10,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:38:10,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:10,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:38:10,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:38:11,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:38:11,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 125 transitions, 1218 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 14:38:11,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:11,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:38:11,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:12,082 INFO L124 PetriNetUnfolderBase]: 2779/4105 cut-off events. [2024-06-04 14:38:12,082 INFO L125 PetriNetUnfolderBase]: For 99546/99565 co-relation queries the response was YES. [2024-06-04 14:38:12,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25697 conditions, 4105 events. 2779/4105 cut-off events. For 99546/99565 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 19287 event pairs, 852 based on Foata normal form. 28/4129 useless extension candidates. Maximal degree in co-relation 25651. Up to 3630 conditions per place. [2024-06-04 14:38:12,110 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 118 selfloop transitions, 48 changer transitions 0/169 dead transitions. [2024-06-04 14:38:12,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 169 transitions, 2008 flow [2024-06-04 14:38:12,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:38:12,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:38:12,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-04 14:38:12,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-04 14:38:12,111 INFO L175 Difference]: Start difference. First operand has 106 places, 125 transitions, 1218 flow. Second operand 8 states and 144 transitions. [2024-06-04 14:38:12,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 169 transitions, 2008 flow [2024-06-04 14:38:12,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 169 transitions, 1858 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-04 14:38:12,151 INFO L231 Difference]: Finished difference. Result has 108 places, 132 transitions, 1339 flow [2024-06-04 14:38:12,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1339, PETRI_PLACES=108, PETRI_TRANSITIONS=132} [2024-06-04 14:38:12,152 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 64 predicate places. [2024-06-04 14:38:12,152 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 132 transitions, 1339 flow [2024-06-04 14:38:12,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 14:38:12,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:12,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:12,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 14:38:12,153 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:38:12,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:12,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1928339668, now seen corresponding path program 1 times [2024-06-04 14:38:12,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:12,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821393207] [2024-06-04 14:38:12,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:12,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:12,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:15,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:15,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:15,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821393207] [2024-06-04 14:38:15,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821393207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:15,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:15,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:38:15,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931270905] [2024-06-04 14:38:15,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:15,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:38:15,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:15,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:38:15,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:38:15,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-04 14:38:15,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 132 transitions, 1339 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:15,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:15,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-04 14:38:15,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:16,742 INFO L124 PetriNetUnfolderBase]: 2474/3771 cut-off events. [2024-06-04 14:38:16,742 INFO L125 PetriNetUnfolderBase]: For 92009/92009 co-relation queries the response was YES. [2024-06-04 14:38:16,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23735 conditions, 3771 events. 2474/3771 cut-off events. For 92009/92009 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 18375 event pairs, 761 based on Foata normal form. 4/3773 useless extension candidates. Maximal degree in co-relation 23688. Up to 3596 conditions per place. [2024-06-04 14:38:16,763 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 145 selfloop transitions, 19 changer transitions 0/168 dead transitions. [2024-06-04 14:38:16,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 168 transitions, 1855 flow [2024-06-04 14:38:16,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:38:16,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:38:16,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-04 14:38:16,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38242894056847543 [2024-06-04 14:38:16,765 INFO L175 Difference]: Start difference. First operand has 108 places, 132 transitions, 1339 flow. Second operand 9 states and 148 transitions. [2024-06-04 14:38:16,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 168 transitions, 1855 flow [2024-06-04 14:38:16,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 168 transitions, 1657 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-04 14:38:16,822 INFO L231 Difference]: Finished difference. Result has 113 places, 140 transitions, 1306 flow [2024-06-04 14:38:16,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1306, PETRI_PLACES=113, PETRI_TRANSITIONS=140} [2024-06-04 14:38:16,823 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-04 14:38:16,823 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 140 transitions, 1306 flow [2024-06-04 14:38:16,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:16,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:16,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:16,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 14:38:16,824 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:38:16,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:16,824 INFO L85 PathProgramCache]: Analyzing trace with hash -204513978, now seen corresponding path program 1 times [2024-06-04 14:38:16,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:16,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509668736] [2024-06-04 14:38:16,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:16,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:16,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:18,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:18,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:18,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509668736] [2024-06-04 14:38:18,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509668736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:18,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:18,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:38:18,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261306533] [2024-06-04 14:38:18,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:18,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:38:18,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:18,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:38:18,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:38:19,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-04 14:38:19,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 140 transitions, 1306 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:19,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:19,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-04 14:38:19,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:19,800 INFO L124 PetriNetUnfolderBase]: 2468/3763 cut-off events. [2024-06-04 14:38:19,800 INFO L125 PetriNetUnfolderBase]: For 88971/88971 co-relation queries the response was YES. [2024-06-04 14:38:19,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23047 conditions, 3763 events. 2468/3763 cut-off events. For 88971/88971 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 18274 event pairs, 774 based on Foata normal form. 2/3763 useless extension candidates. Maximal degree in co-relation 22998. Up to 3633 conditions per place. [2024-06-04 14:38:19,825 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 138 selfloop transitions, 11 changer transitions 0/153 dead transitions. [2024-06-04 14:38:19,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 153 transitions, 1658 flow [2024-06-04 14:38:19,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:38:19,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:38:19,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-04 14:38:19,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375968992248062 [2024-06-04 14:38:19,827 INFO L175 Difference]: Start difference. First operand has 113 places, 140 transitions, 1306 flow. Second operand 6 states and 97 transitions. [2024-06-04 14:38:19,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 153 transitions, 1658 flow [2024-06-04 14:38:19,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 153 transitions, 1569 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-04 14:38:19,875 INFO L231 Difference]: Finished difference. Result has 114 places, 143 transitions, 1277 flow [2024-06-04 14:38:19,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1217, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1277, PETRI_PLACES=114, PETRI_TRANSITIONS=143} [2024-06-04 14:38:19,875 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 70 predicate places. [2024-06-04 14:38:19,875 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 143 transitions, 1277 flow [2024-06-04 14:38:19,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:19,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:19,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:19,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 14:38:19,876 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:38:19,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:19,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1721164028, now seen corresponding path program 1 times [2024-06-04 14:38:19,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:19,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720646987] [2024-06-04 14:38:19,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:19,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:19,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:22,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:22,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:22,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720646987] [2024-06-04 14:38:22,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720646987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:22,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:22,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:38:22,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197824228] [2024-06-04 14:38:22,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:22,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:38:22,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:22,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:38:22,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:38:22,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:38:22,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 143 transitions, 1277 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:22,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:22,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:38:22,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:23,654 INFO L124 PetriNetUnfolderBase]: 2779/4107 cut-off events. [2024-06-04 14:38:23,655 INFO L125 PetriNetUnfolderBase]: For 109370/109376 co-relation queries the response was YES. [2024-06-04 14:38:23,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26215 conditions, 4107 events. 2779/4107 cut-off events. For 109370/109376 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 19223 event pairs, 671 based on Foata normal form. 10/4115 useless extension candidates. Maximal degree in co-relation 26165. Up to 3946 conditions per place. [2024-06-04 14:38:23,681 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 146 selfloop transitions, 27 changer transitions 0/176 dead transitions. [2024-06-04 14:38:23,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 176 transitions, 1775 flow [2024-06-04 14:38:23,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:38:23,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:38:23,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-04 14:38:23,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-04 14:38:23,682 INFO L175 Difference]: Start difference. First operand has 114 places, 143 transitions, 1277 flow. Second operand 8 states and 133 transitions. [2024-06-04 14:38:23,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 176 transitions, 1775 flow [2024-06-04 14:38:23,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 176 transitions, 1737 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 14:38:23,727 INFO L231 Difference]: Finished difference. Result has 118 places, 145 transitions, 1358 flow [2024-06-04 14:38:23,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1239, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1358, PETRI_PLACES=118, PETRI_TRANSITIONS=145} [2024-06-04 14:38:23,728 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 74 predicate places. [2024-06-04 14:38:23,728 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 145 transitions, 1358 flow [2024-06-04 14:38:23,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:23,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:23,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:23,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 14:38:23,728 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:38:23,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:23,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1721224478, now seen corresponding path program 2 times [2024-06-04 14:38:23,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:23,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651486879] [2024-06-04 14:38:23,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:23,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:23,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:26,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:26,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651486879] [2024-06-04 14:38:26,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651486879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:26,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:26,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:38:26,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646752462] [2024-06-04 14:38:26,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:26,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:38:26,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:26,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:38:26,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:38:26,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:38:26,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 145 transitions, 1358 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:26,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:26,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:38:26,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:27,754 INFO L124 PetriNetUnfolderBase]: 2796/4134 cut-off events. [2024-06-04 14:38:27,754 INFO L125 PetriNetUnfolderBase]: For 118746/118752 co-relation queries the response was YES. [2024-06-04 14:38:27,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26961 conditions, 4134 events. 2796/4134 cut-off events. For 118746/118752 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19372 event pairs, 827 based on Foata normal form. 10/4142 useless extension candidates. Maximal degree in co-relation 26910. Up to 3949 conditions per place. [2024-06-04 14:38:27,777 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 141 selfloop transitions, 34 changer transitions 0/178 dead transitions. [2024-06-04 14:38:27,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 178 transitions, 1866 flow [2024-06-04 14:38:27,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:38:27,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:38:27,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-04 14:38:27,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-04 14:38:27,779 INFO L175 Difference]: Start difference. First operand has 118 places, 145 transitions, 1358 flow. Second operand 8 states and 134 transitions. [2024-06-04 14:38:27,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 178 transitions, 1866 flow [2024-06-04 14:38:27,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 178 transitions, 1765 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-04 14:38:27,830 INFO L231 Difference]: Finished difference. Result has 120 places, 147 transitions, 1396 flow [2024-06-04 14:38:27,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1257, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1396, PETRI_PLACES=120, PETRI_TRANSITIONS=147} [2024-06-04 14:38:27,831 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 76 predicate places. [2024-06-04 14:38:27,831 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 147 transitions, 1396 flow [2024-06-04 14:38:27,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:27,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:27,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:27,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 14:38:27,832 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:38:27,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:27,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1574240900, now seen corresponding path program 1 times [2024-06-04 14:38:27,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:27,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404099816] [2024-06-04 14:38:27,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:27,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:31,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:31,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:31,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404099816] [2024-06-04 14:38:31,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404099816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:31,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:31,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:38:31,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506187641] [2024-06-04 14:38:31,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:31,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:38:31,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:31,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:38:31,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:38:31,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:38:31,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 147 transitions, 1396 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:31,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:31,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:38:31,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:32,509 INFO L124 PetriNetUnfolderBase]: 2786/4120 cut-off events. [2024-06-04 14:38:32,509 INFO L125 PetriNetUnfolderBase]: For 127773/127779 co-relation queries the response was YES. [2024-06-04 14:38:32,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27160 conditions, 4120 events. 2786/4120 cut-off events. For 127773/127779 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 19316 event pairs, 808 based on Foata normal form. 10/4128 useless extension candidates. Maximal degree in co-relation 27108. Up to 3889 conditions per place. [2024-06-04 14:38:32,535 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 141 selfloop transitions, 38 changer transitions 0/182 dead transitions. [2024-06-04 14:38:32,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 182 transitions, 1940 flow [2024-06-04 14:38:32,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:38:32,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:38:32,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-04 14:38:32,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-04 14:38:32,537 INFO L175 Difference]: Start difference. First operand has 120 places, 147 transitions, 1396 flow. Second operand 8 states and 136 transitions. [2024-06-04 14:38:32,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 182 transitions, 1940 flow [2024-06-04 14:38:32,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 182 transitions, 1823 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-04 14:38:32,592 INFO L231 Difference]: Finished difference. Result has 122 places, 150 transitions, 1454 flow [2024-06-04 14:38:32,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1279, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1454, PETRI_PLACES=122, PETRI_TRANSITIONS=150} [2024-06-04 14:38:32,593 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 78 predicate places. [2024-06-04 14:38:32,593 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 150 transitions, 1454 flow [2024-06-04 14:38:32,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:32,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:32,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:32,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 14:38:32,594 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:38:32,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:32,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1839312158, now seen corresponding path program 3 times [2024-06-04 14:38:32,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:32,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110841490] [2024-06-04 14:38:32,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:32,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:35,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:35,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:35,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110841490] [2024-06-04 14:38:35,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110841490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:35,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:35,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:38:35,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942750491] [2024-06-04 14:38:35,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:35,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:38:35,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:35,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:38:35,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:38:35,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:38:35,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 150 transitions, 1454 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:35,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:35,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:38:35,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:36,366 INFO L124 PetriNetUnfolderBase]: 2803/4148 cut-off events. [2024-06-04 14:38:36,366 INFO L125 PetriNetUnfolderBase]: For 137727/137727 co-relation queries the response was YES. [2024-06-04 14:38:36,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27976 conditions, 4148 events. 2803/4148 cut-off events. For 137727/137727 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19493 event pairs, 806 based on Foata normal form. 4/4150 useless extension candidates. Maximal degree in co-relation 27923. Up to 3940 conditions per place. [2024-06-04 14:38:36,389 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 139 selfloop transitions, 38 changer transitions 0/180 dead transitions. [2024-06-04 14:38:36,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 180 transitions, 1958 flow [2024-06-04 14:38:36,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:38:36,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:38:36,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-04 14:38:36,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-04 14:38:36,391 INFO L175 Difference]: Start difference. First operand has 122 places, 150 transitions, 1454 flow. Second operand 8 states and 134 transitions. [2024-06-04 14:38:36,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 180 transitions, 1958 flow [2024-06-04 14:38:36,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 180 transitions, 1823 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-04 14:38:36,449 INFO L231 Difference]: Finished difference. Result has 124 places, 152 transitions, 1470 flow [2024-06-04 14:38:36,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1319, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1470, PETRI_PLACES=124, PETRI_TRANSITIONS=152} [2024-06-04 14:38:36,450 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-04 14:38:36,450 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 152 transitions, 1470 flow [2024-06-04 14:38:36,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:36,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:36,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:36,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 14:38:36,451 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:38:36,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:36,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1689831964, now seen corresponding path program 1 times [2024-06-04 14:38:36,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:36,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698967104] [2024-06-04 14:38:36,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:36,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:36,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:39,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:39,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698967104] [2024-06-04 14:38:39,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698967104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:39,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:39,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:38:39,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919300849] [2024-06-04 14:38:39,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:39,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:38:39,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:39,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:38:39,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:38:39,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:38:39,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 152 transitions, 1470 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:39,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:39,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:38:39,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:41,275 INFO L124 PetriNetUnfolderBase]: 2792/4130 cut-off events. [2024-06-04 14:38:41,276 INFO L125 PetriNetUnfolderBase]: For 145641/145647 co-relation queries the response was YES. [2024-06-04 14:38:41,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28156 conditions, 4130 events. 2792/4130 cut-off events. For 145641/145647 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 19380 event pairs, 796 based on Foata normal form. 8/4136 useless extension candidates. Maximal degree in co-relation 28102. Up to 4050 conditions per place. [2024-06-04 14:38:41,300 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 160 selfloop transitions, 23 changer transitions 0/186 dead transitions. [2024-06-04 14:38:41,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 186 transitions, 1957 flow [2024-06-04 14:38:41,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:38:41,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:38:41,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-04 14:38:41,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695090439276486 [2024-06-04 14:38:41,302 INFO L175 Difference]: Start difference. First operand has 124 places, 152 transitions, 1470 flow. Second operand 9 states and 143 transitions. [2024-06-04 14:38:41,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 186 transitions, 1957 flow [2024-06-04 14:38:41,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 186 transitions, 1800 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-04 14:38:41,373 INFO L231 Difference]: Finished difference. Result has 128 places, 155 transitions, 1394 flow [2024-06-04 14:38:41,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1394, PETRI_PLACES=128, PETRI_TRANSITIONS=155} [2024-06-04 14:38:41,374 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 84 predicate places. [2024-06-04 14:38:41,374 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 155 transitions, 1394 flow [2024-06-04 14:38:41,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:41,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:41,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:41,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 14:38:41,374 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:38:41,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:41,375 INFO L85 PathProgramCache]: Analyzing trace with hash -591149220, now seen corresponding path program 1 times [2024-06-04 14:38:41,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:41,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522076141] [2024-06-04 14:38:41,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:41,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:41,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:43,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:43,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522076141] [2024-06-04 14:38:43,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522076141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:43,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:43,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:38:43,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949795600] [2024-06-04 14:38:43,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:43,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:38:43,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:43,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:38:43,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:38:43,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:38:43,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 155 transitions, 1394 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:43,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:43,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:38:43,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:44,356 INFO L124 PetriNetUnfolderBase]: 2797/4137 cut-off events. [2024-06-04 14:38:44,356 INFO L125 PetriNetUnfolderBase]: For 152114/152120 co-relation queries the response was YES. [2024-06-04 14:38:44,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28441 conditions, 4137 events. 2797/4137 cut-off events. For 152114/152120 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 19426 event pairs, 790 based on Foata normal form. 7/4142 useless extension candidates. Maximal degree in co-relation 28385. Up to 4093 conditions per place. [2024-06-04 14:38:44,386 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 157 selfloop transitions, 14 changer transitions 0/174 dead transitions. [2024-06-04 14:38:44,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 174 transitions, 1822 flow [2024-06-04 14:38:44,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:38:44,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:38:44,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-04 14:38:44,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375968992248062 [2024-06-04 14:38:44,387 INFO L175 Difference]: Start difference. First operand has 128 places, 155 transitions, 1394 flow. Second operand 6 states and 97 transitions. [2024-06-04 14:38:44,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 174 transitions, 1822 flow [2024-06-04 14:38:44,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 174 transitions, 1746 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-04 14:38:44,469 INFO L231 Difference]: Finished difference. Result has 127 places, 158 transitions, 1391 flow [2024-06-04 14:38:44,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1318, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1391, PETRI_PLACES=127, PETRI_TRANSITIONS=158} [2024-06-04 14:38:44,470 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 83 predicate places. [2024-06-04 14:38:44,470 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 158 transitions, 1391 flow [2024-06-04 14:38:44,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:44,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:44,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:44,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 14:38:44,471 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:38:44,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:44,471 INFO L85 PathProgramCache]: Analyzing trace with hash 114346146, now seen corresponding path program 4 times [2024-06-04 14:38:44,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:44,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057211093] [2024-06-04 14:38:44,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:44,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:44,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:47,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:47,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:47,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057211093] [2024-06-04 14:38:47,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057211093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:47,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:47,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:38:47,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870104634] [2024-06-04 14:38:47,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:47,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:38:47,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:47,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:38:47,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:38:47,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:38:47,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 158 transitions, 1391 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:47,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:47,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:38:47,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:48,552 INFO L124 PetriNetUnfolderBase]: 2789/4129 cut-off events. [2024-06-04 14:38:48,552 INFO L125 PetriNetUnfolderBase]: For 160227/160240 co-relation queries the response was YES. [2024-06-04 14:38:48,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28787 conditions, 4129 events. 2789/4129 cut-off events. For 160227/160240 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 19363 event pairs, 777 based on Foata normal form. 10/4134 useless extension candidates. Maximal degree in co-relation 28730. Up to 3882 conditions per place. [2024-06-04 14:38:48,579 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 138 selfloop transitions, 45 changer transitions 0/186 dead transitions. [2024-06-04 14:38:48,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 186 transitions, 1905 flow [2024-06-04 14:38:48,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:38:48,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:38:48,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-04 14:38:48,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-04 14:38:48,581 INFO L175 Difference]: Start difference. First operand has 127 places, 158 transitions, 1391 flow. Second operand 8 states and 133 transitions. [2024-06-04 14:38:48,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 186 transitions, 1905 flow [2024-06-04 14:38:48,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 186 transitions, 1856 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-04 14:38:48,640 INFO L231 Difference]: Finished difference. Result has 131 places, 160 transitions, 1511 flow [2024-06-04 14:38:48,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1342, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1511, PETRI_PLACES=131, PETRI_TRANSITIONS=160} [2024-06-04 14:38:48,640 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-04 14:38:48,640 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 160 transitions, 1511 flow [2024-06-04 14:38:48,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:48,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:48,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:48,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 14:38:48,641 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:38:48,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:48,641 INFO L85 PathProgramCache]: Analyzing trace with hash -2044979248, now seen corresponding path program 2 times [2024-06-04 14:38:48,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:48,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36024482] [2024-06-04 14:38:48,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:48,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:48,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:50,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:50,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36024482] [2024-06-04 14:38:50,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36024482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:50,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:50,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:38:50,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144762411] [2024-06-04 14:38:50,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:50,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:38:50,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:50,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:38:50,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:38:50,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:38:50,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 160 transitions, 1511 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:50,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:50,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:38:50,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:51,415 INFO L124 PetriNetUnfolderBase]: 2786/4122 cut-off events. [2024-06-04 14:38:51,415 INFO L125 PetriNetUnfolderBase]: For 168792/168811 co-relation queries the response was YES. [2024-06-04 14:38:51,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29334 conditions, 4122 events. 2786/4122 cut-off events. For 168792/168811 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 19348 event pairs, 791 based on Foata normal form. 17/4135 useless extension candidates. Maximal degree in co-relation 29276. Up to 4071 conditions per place. [2024-06-04 14:38:51,445 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 152 selfloop transitions, 19 changer transitions 0/174 dead transitions. [2024-06-04 14:38:51,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 174 transitions, 1929 flow [2024-06-04 14:38:51,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:38:51,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:38:51,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-06-04 14:38:51,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36046511627906974 [2024-06-04 14:38:51,446 INFO L175 Difference]: Start difference. First operand has 131 places, 160 transitions, 1511 flow. Second operand 6 states and 93 transitions. [2024-06-04 14:38:51,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 174 transitions, 1929 flow [2024-06-04 14:38:51,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 174 transitions, 1778 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-04 14:38:51,524 INFO L231 Difference]: Finished difference. Result has 131 places, 163 transitions, 1448 flow [2024-06-04 14:38:51,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1360, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1448, PETRI_PLACES=131, PETRI_TRANSITIONS=163} [2024-06-04 14:38:51,525 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-04 14:38:51,525 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 163 transitions, 1448 flow [2024-06-04 14:38:51,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:51,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:51,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:51,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 14:38:51,525 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:38:51,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:51,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1273630710, now seen corresponding path program 1 times [2024-06-04 14:38:51,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:51,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996610801] [2024-06-04 14:38:51,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:51,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:51,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:53,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:53,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996610801] [2024-06-04 14:38:53,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996610801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:53,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:53,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:38:53,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461696492] [2024-06-04 14:38:53,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:53,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:38:53,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:53,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:38:53,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:38:53,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-04 14:38:53,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 163 transitions, 1448 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:53,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:53,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-04 14:38:53,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:54,169 INFO L124 PetriNetUnfolderBase]: 2497/3799 cut-off events. [2024-06-04 14:38:54,169 INFO L125 PetriNetUnfolderBase]: For 150679/150679 co-relation queries the response was YES. [2024-06-04 14:38:54,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26566 conditions, 3799 events. 2497/3799 cut-off events. For 150679/150679 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 18456 event pairs, 681 based on Foata normal form. 1/3798 useless extension candidates. Maximal degree in co-relation 26507. Up to 3678 conditions per place. [2024-06-04 14:38:54,196 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 163 selfloop transitions, 11 changer transitions 0/178 dead transitions. [2024-06-04 14:38:54,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 178 transitions, 1876 flow [2024-06-04 14:38:54,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:38:54,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:38:54,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-04 14:38:54,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-04 14:38:54,197 INFO L175 Difference]: Start difference. First operand has 131 places, 163 transitions, 1448 flow. Second operand 6 states and 99 transitions. [2024-06-04 14:38:54,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 178 transitions, 1876 flow [2024-06-04 14:38:54,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 178 transitions, 1810 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-04 14:38:54,263 INFO L231 Difference]: Finished difference. Result has 133 places, 166 transitions, 1460 flow [2024-06-04 14:38:54,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1382, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1460, PETRI_PLACES=133, PETRI_TRANSITIONS=166} [2024-06-04 14:38:54,264 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-04 14:38:54,264 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 166 transitions, 1460 flow [2024-06-04 14:38:54,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:54,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:54,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:54,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 14:38:54,264 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:38:54,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:54,264 INFO L85 PathProgramCache]: Analyzing trace with hash 156809622, now seen corresponding path program 2 times [2024-06-04 14:38:54,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:54,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128449849] [2024-06-04 14:38:54,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:54,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:56,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:56,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:56,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128449849] [2024-06-04 14:38:56,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128449849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:56,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:56,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:38:56,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804881302] [2024-06-04 14:38:56,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:56,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:38:56,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:56,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:38:56,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:38:56,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-04 14:38:56,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 166 transitions, 1460 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:56,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:56,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-04 14:38:56,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:38:56,925 INFO L124 PetriNetUnfolderBase]: 2494/3795 cut-off events. [2024-06-04 14:38:56,925 INFO L125 PetriNetUnfolderBase]: For 157383/157383 co-relation queries the response was YES. [2024-06-04 14:38:56,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26996 conditions, 3795 events. 2494/3795 cut-off events. For 157383/157383 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 18503 event pairs, 681 based on Foata normal form. 1/3794 useless extension candidates. Maximal degree in co-relation 26936. Up to 3680 conditions per place. [2024-06-04 14:38:56,949 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 163 selfloop transitions, 11 changer transitions 0/178 dead transitions. [2024-06-04 14:38:56,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 178 transitions, 1884 flow [2024-06-04 14:38:56,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:38:56,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:38:56,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-04 14:38:56,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-04 14:38:56,950 INFO L175 Difference]: Start difference. First operand has 133 places, 166 transitions, 1460 flow. Second operand 6 states and 96 transitions. [2024-06-04 14:38:56,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 178 transitions, 1884 flow [2024-06-04 14:38:57,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 178 transitions, 1828 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-04 14:38:57,027 INFO L231 Difference]: Finished difference. Result has 135 places, 169 transitions, 1488 flow [2024-06-04 14:38:57,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1404, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1488, PETRI_PLACES=135, PETRI_TRANSITIONS=169} [2024-06-04 14:38:57,027 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 91 predicate places. [2024-06-04 14:38:57,027 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 169 transitions, 1488 flow [2024-06-04 14:38:57,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:38:57,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:38:57,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:38:57,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 14:38:57,028 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:38:57,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:38:57,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1471834186, now seen corresponding path program 1 times [2024-06-04 14:38:57,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:38:57,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064398382] [2024-06-04 14:38:57,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:38:57,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:38:57,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:38:59,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:38:59,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:38:59,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064398382] [2024-06-04 14:38:59,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064398382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:38:59,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:38:59,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:38:59,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169234619] [2024-06-04 14:38:59,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:38:59,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:38:59,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:38:59,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:38:59,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:38:59,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:38:59,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 169 transitions, 1488 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:38:59,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:38:59,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:38:59,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:39:01,145 INFO L124 PetriNetUnfolderBase]: 2822/4178 cut-off events. [2024-06-04 14:39:01,145 INFO L125 PetriNetUnfolderBase]: For 202740/202746 co-relation queries the response was YES. [2024-06-04 14:39:01,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31183 conditions, 4178 events. 2822/4178 cut-off events. For 202740/202746 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 19669 event pairs, 605 based on Foata normal form. 14/4190 useless extension candidates. Maximal degree in co-relation 31122. Up to 3971 conditions per place. [2024-06-04 14:39:01,176 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 176 selfloop transitions, 29 changer transitions 0/208 dead transitions. [2024-06-04 14:39:01,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 208 transitions, 2086 flow [2024-06-04 14:39:01,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:39:01,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:39:01,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-04 14:39:01,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38242894056847543 [2024-06-04 14:39:01,178 INFO L175 Difference]: Start difference. First operand has 135 places, 169 transitions, 1488 flow. Second operand 9 states and 148 transitions. [2024-06-04 14:39:01,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 208 transitions, 2086 flow [2024-06-04 14:39:01,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 208 transitions, 2024 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-04 14:39:01,260 INFO L231 Difference]: Finished difference. Result has 140 places, 171 transitions, 1565 flow [2024-06-04 14:39:01,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1426, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1565, PETRI_PLACES=140, PETRI_TRANSITIONS=171} [2024-06-04 14:39:01,260 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 96 predicate places. [2024-06-04 14:39:01,261 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 171 transitions, 1565 flow [2024-06-04 14:39:01,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:39:01,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:39:01,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:39:01,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 14:39:01,261 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:39:01,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:39:01,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1473708136, now seen corresponding path program 2 times [2024-06-04 14:39:01,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:39:01,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045826679] [2024-06-04 14:39:01,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:39:01,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:39:01,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:39:04,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:39:04,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:39:04,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045826679] [2024-06-04 14:39:04,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045826679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:39:04,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:39:04,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:39:04,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877659828] [2024-06-04 14:39:04,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:39:04,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:39:04,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:39:04,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:39:04,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:39:04,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:39:04,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 171 transitions, 1565 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:39:04,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:39:04,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:39:04,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:39:05,726 INFO L124 PetriNetUnfolderBase]: 2856/4232 cut-off events. [2024-06-04 14:39:05,726 INFO L125 PetriNetUnfolderBase]: For 215813/215819 co-relation queries the response was YES. [2024-06-04 14:39:05,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32191 conditions, 4232 events. 2856/4232 cut-off events. For 215813/215819 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 19991 event pairs, 761 based on Foata normal form. 14/4244 useless extension candidates. Maximal degree in co-relation 32129. Up to 4001 conditions per place. [2024-06-04 14:39:05,761 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 171 selfloop transitions, 36 changer transitions 0/210 dead transitions. [2024-06-04 14:39:05,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 210 transitions, 2173 flow [2024-06-04 14:39:05,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:39:05,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:39:05,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-04 14:39:05,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3850129198966408 [2024-06-04 14:39:05,763 INFO L175 Difference]: Start difference. First operand has 140 places, 171 transitions, 1565 flow. Second operand 9 states and 149 transitions. [2024-06-04 14:39:05,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 210 transitions, 2173 flow [2024-06-04 14:39:05,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 210 transitions, 2052 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-04 14:39:05,872 INFO L231 Difference]: Finished difference. Result has 142 places, 173 transitions, 1601 flow [2024-06-04 14:39:05,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1444, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1601, PETRI_PLACES=142, PETRI_TRANSITIONS=173} [2024-06-04 14:39:05,872 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-04 14:39:05,872 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 173 transitions, 1601 flow [2024-06-04 14:39:05,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:39:05,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:39:05,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:39:05,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 14:39:05,873 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:39:05,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:39:05,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1818356212, now seen corresponding path program 3 times [2024-06-04 14:39:05,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:39:05,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800604585] [2024-06-04 14:39:05,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:39:05,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:39:05,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:39:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:39:08,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:39:08,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800604585] [2024-06-04 14:39:08,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800604585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:39:08,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:39:08,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:39:08,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913513359] [2024-06-04 14:39:08,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:39:08,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:39:08,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:39:08,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:39:08,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:39:09,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:39:09,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 173 transitions, 1601 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:39:09,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:39:09,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:39:09,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:39:10,555 INFO L124 PetriNetUnfolderBase]: 2890/4286 cut-off events. [2024-06-04 14:39:10,555 INFO L125 PetriNetUnfolderBase]: For 232517/232523 co-relation queries the response was YES. [2024-06-04 14:39:10,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32912 conditions, 4286 events. 2890/4286 cut-off events. For 232517/232523 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 20360 event pairs, 767 based on Foata normal form. 14/4298 useless extension candidates. Maximal degree in co-relation 32849. Up to 3999 conditions per place. [2024-06-04 14:39:10,585 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 170 selfloop transitions, 40 changer transitions 0/213 dead transitions. [2024-06-04 14:39:10,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 213 transitions, 2227 flow [2024-06-04 14:39:10,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:39:10,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:39:10,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-04 14:39:10,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39018087855297157 [2024-06-04 14:39:10,586 INFO L175 Difference]: Start difference. First operand has 142 places, 173 transitions, 1601 flow. Second operand 9 states and 151 transitions. [2024-06-04 14:39:10,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 213 transitions, 2227 flow [2024-06-04 14:39:10,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 213 transitions, 2088 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-04 14:39:10,690 INFO L231 Difference]: Finished difference. Result has 144 places, 175 transitions, 1632 flow [2024-06-04 14:39:10,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1462, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1632, PETRI_PLACES=144, PETRI_TRANSITIONS=175} [2024-06-04 14:39:10,690 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-04 14:39:10,691 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 175 transitions, 1632 flow [2024-06-04 14:39:10,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:39:10,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:39:10,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:39:10,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 14:39:10,691 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:39:10,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:39:10,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1905198124, now seen corresponding path program 1 times [2024-06-04 14:39:10,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:39:10,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212084369] [2024-06-04 14:39:10,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:39:10,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:39:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:39:13,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:39:13,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:39:13,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212084369] [2024-06-04 14:39:13,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212084369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:39:13,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:39:13,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:39:13,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174509416] [2024-06-04 14:39:13,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:39:13,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:39:13,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:39:13,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:39:13,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:39:14,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:39:14,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 175 transitions, 1632 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:39:14,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:39:14,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:39:14,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:39:15,586 INFO L124 PetriNetUnfolderBase]: 2912/4318 cut-off events. [2024-06-04 14:39:15,586 INFO L125 PetriNetUnfolderBase]: For 241346/241352 co-relation queries the response was YES. [2024-06-04 14:39:15,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33422 conditions, 4318 events. 2912/4318 cut-off events. For 241346/241352 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 20569 event pairs, 771 based on Foata normal form. 10/4326 useless extension candidates. Maximal degree in co-relation 33358. Up to 4096 conditions per place. [2024-06-04 14:39:15,620 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 179 selfloop transitions, 40 changer transitions 0/222 dead transitions. [2024-06-04 14:39:15,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 222 transitions, 2313 flow [2024-06-04 14:39:15,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:39:15,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:39:15,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-04 14:39:15,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-04 14:39:15,621 INFO L175 Difference]: Start difference. First operand has 144 places, 175 transitions, 1632 flow. Second operand 10 states and 165 transitions. [2024-06-04 14:39:15,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 222 transitions, 2313 flow [2024-06-04 14:39:15,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 222 transitions, 2160 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-04 14:39:15,753 INFO L231 Difference]: Finished difference. Result has 148 places, 181 transitions, 1689 flow [2024-06-04 14:39:15,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1689, PETRI_PLACES=148, PETRI_TRANSITIONS=181} [2024-06-04 14:39:15,754 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 104 predicate places. [2024-06-04 14:39:15,754 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 181 transitions, 1689 flow [2024-06-04 14:39:15,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:39:15,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:39:15,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:39:15,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 14:39:15,755 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:39:15,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:39:15,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1146083706, now seen corresponding path program 1 times [2024-06-04 14:39:15,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:39:15,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891373669] [2024-06-04 14:39:15,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:39:15,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:39:15,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:39:17,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:39:17,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:39:17,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891373669] [2024-06-04 14:39:17,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891373669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:39:17,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:39:17,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:39:17,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838013237] [2024-06-04 14:39:17,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:39:17,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:39:17,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:39:17,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:39:17,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:39:17,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:39:17,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 181 transitions, 1689 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:17,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:39:17,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:39:17,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:39:18,956 INFO L124 PetriNetUnfolderBase]: 2922/4332 cut-off events. [2024-06-04 14:39:18,956 INFO L125 PetriNetUnfolderBase]: For 250214/250220 co-relation queries the response was YES. [2024-06-04 14:39:18,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34114 conditions, 4332 events. 2922/4332 cut-off events. For 250214/250220 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 20633 event pairs, 791 based on Foata normal form. 8/4338 useless extension candidates. Maximal degree in co-relation 34048. Up to 4216 conditions per place. [2024-06-04 14:39:18,992 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 178 selfloop transitions, 26 changer transitions 0/207 dead transitions. [2024-06-04 14:39:18,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 207 transitions, 2225 flow [2024-06-04 14:39:18,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:39:18,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:39:18,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-04 14:39:18,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-04 14:39:18,993 INFO L175 Difference]: Start difference. First operand has 148 places, 181 transitions, 1689 flow. Second operand 7 states and 116 transitions. [2024-06-04 14:39:18,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 207 transitions, 2225 flow [2024-06-04 14:39:19,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 207 transitions, 2067 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-04 14:39:19,143 INFO L231 Difference]: Finished difference. Result has 148 places, 184 transitions, 1651 flow [2024-06-04 14:39:19,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1531, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1651, PETRI_PLACES=148, PETRI_TRANSITIONS=184} [2024-06-04 14:39:19,144 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 104 predicate places. [2024-06-04 14:39:19,144 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 184 transitions, 1651 flow [2024-06-04 14:39:19,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:19,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:39:19,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:39:19,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 14:39:19,145 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:39:19,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:39:19,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1184106996, now seen corresponding path program 4 times [2024-06-04 14:39:19,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:39:19,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336633971] [2024-06-04 14:39:19,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:39:19,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:39:19,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:39:22,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:39:22,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:39:22,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336633971] [2024-06-04 14:39:22,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336633971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:39:22,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:39:22,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:39:22,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029018077] [2024-06-04 14:39:22,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:39:22,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:39:22,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:39:22,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:39:22,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:39:22,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:39:22,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 184 transitions, 1651 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:39:22,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:39:22,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:39:22,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:39:23,612 INFO L124 PetriNetUnfolderBase]: 2956/4387 cut-off events. [2024-06-04 14:39:23,613 INFO L125 PetriNetUnfolderBase]: For 267658/267658 co-relation queries the response was YES. [2024-06-04 14:39:23,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34949 conditions, 4387 events. 2956/4387 cut-off events. For 267658/267658 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 20981 event pairs, 770 based on Foata normal form. 8/4393 useless extension candidates. Maximal degree in co-relation 34882. Up to 4105 conditions per place. [2024-06-04 14:39:23,649 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 177 selfloop transitions, 41 changer transitions 0/221 dead transitions. [2024-06-04 14:39:23,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 221 transitions, 2289 flow [2024-06-04 14:39:23,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:39:23,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:39:23,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-04 14:39:23,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39018087855297157 [2024-06-04 14:39:23,651 INFO L175 Difference]: Start difference. First operand has 148 places, 184 transitions, 1651 flow. Second operand 9 states and 151 transitions. [2024-06-04 14:39:23,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 221 transitions, 2289 flow [2024-06-04 14:39:23,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 221 transitions, 2199 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-04 14:39:23,859 INFO L231 Difference]: Finished difference. Result has 152 places, 186 transitions, 1738 flow [2024-06-04 14:39:23,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1561, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1738, PETRI_PLACES=152, PETRI_TRANSITIONS=186} [2024-06-04 14:39:23,860 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-04 14:39:23,860 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 186 transitions, 1738 flow [2024-06-04 14:39:23,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:39:23,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:39:23,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:39:23,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 14:39:23,861 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:39:23,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:39:23,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1184257098, now seen corresponding path program 2 times [2024-06-04 14:39:23,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:39:23,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174200833] [2024-06-04 14:39:23,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:39:23,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:39:23,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:39:27,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:39:27,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:39:27,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174200833] [2024-06-04 14:39:27,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174200833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:39:27,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:39:27,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:39:27,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861787435] [2024-06-04 14:39:27,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:39:27,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:39:27,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:39:27,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:39:27,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:39:27,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:39:27,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 186 transitions, 1738 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:39:27,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:39:27,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:39:27,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:39:29,303 INFO L124 PetriNetUnfolderBase]: 2978/4419 cut-off events. [2024-06-04 14:39:29,303 INFO L125 PetriNetUnfolderBase]: For 281217/281217 co-relation queries the response was YES. [2024-06-04 14:39:29,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35785 conditions, 4419 events. 2978/4419 cut-off events. For 281217/281217 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 21138 event pairs, 775 based on Foata normal form. 4/4421 useless extension candidates. Maximal degree in co-relation 35717. Up to 4160 conditions per place. [2024-06-04 14:39:29,334 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 182 selfloop transitions, 45 changer transitions 0/230 dead transitions. [2024-06-04 14:39:29,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 230 transitions, 2429 flow [2024-06-04 14:39:29,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:39:29,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:39:29,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-04 14:39:29,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-04 14:39:29,336 INFO L175 Difference]: Start difference. First operand has 152 places, 186 transitions, 1738 flow. Second operand 10 states and 165 transitions. [2024-06-04 14:39:29,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 230 transitions, 2429 flow [2024-06-04 14:39:29,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 230 transitions, 2267 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-04 14:39:29,479 INFO L231 Difference]: Finished difference. Result has 156 places, 192 transitions, 1803 flow [2024-06-04 14:39:29,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1579, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1803, PETRI_PLACES=156, PETRI_TRANSITIONS=192} [2024-06-04 14:39:29,479 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 112 predicate places. [2024-06-04 14:39:29,480 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 192 transitions, 1803 flow [2024-06-04 14:39:29,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:39:29,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:39:29,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:39:29,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 14:39:29,480 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:39:29,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:39:29,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1184103276, now seen corresponding path program 5 times [2024-06-04 14:39:29,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:39:29,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620974990] [2024-06-04 14:39:29,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:39:29,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:39:29,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:39:32,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:39:32,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:39:32,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620974990] [2024-06-04 14:39:32,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620974990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:39:32,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:39:32,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:39:32,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758037210] [2024-06-04 14:39:32,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:39:32,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:39:32,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:39:32,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:39:32,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:39:32,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:39:32,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 192 transitions, 1803 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:39:32,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:39:32,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:39:32,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:39:34,155 INFO L124 PetriNetUnfolderBase]: 3012/4473 cut-off events. [2024-06-04 14:39:34,155 INFO L125 PetriNetUnfolderBase]: For 298699/298699 co-relation queries the response was YES. [2024-06-04 14:39:34,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36880 conditions, 4473 events. 3012/4473 cut-off events. For 298699/298699 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 21518 event pairs, 761 based on Foata normal form. 8/4479 useless extension candidates. Maximal degree in co-relation 36810. Up to 4219 conditions per place. [2024-06-04 14:39:34,192 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 185 selfloop transitions, 40 changer transitions 0/228 dead transitions. [2024-06-04 14:39:34,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 228 transitions, 2453 flow [2024-06-04 14:39:34,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:39:34,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:39:34,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-04 14:39:34,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3850129198966408 [2024-06-04 14:39:34,194 INFO L175 Difference]: Start difference. First operand has 156 places, 192 transitions, 1803 flow. Second operand 9 states and 149 transitions. [2024-06-04 14:39:34,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 228 transitions, 2453 flow [2024-06-04 14:39:34,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 228 transitions, 2273 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-04 14:39:34,383 INFO L231 Difference]: Finished difference. Result has 158 places, 194 transitions, 1804 flow [2024-06-04 14:39:34,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1623, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1804, PETRI_PLACES=158, PETRI_TRANSITIONS=194} [2024-06-04 14:39:34,384 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-04 14:39:34,384 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 194 transitions, 1804 flow [2024-06-04 14:39:34,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:39:34,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:39:34,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:39:34,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 14:39:34,385 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:39:34,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:39:34,385 INFO L85 PathProgramCache]: Analyzing trace with hash 845184651, now seen corresponding path program 1 times [2024-06-04 14:39:34,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:39:34,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792288844] [2024-06-04 14:39:34,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:39:34,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:39:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:39:37,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:39:37,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:39:37,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792288844] [2024-06-04 14:39:37,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792288844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:39:37,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:39:37,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:39:37,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107042751] [2024-06-04 14:39:37,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:39:37,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:39:37,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:39:37,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:39:37,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:39:38,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:39:38,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 194 transitions, 1804 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:39:38,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:39:38,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:39:38,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:39:39,574 INFO L124 PetriNetUnfolderBase]: 3029/4499 cut-off events. [2024-06-04 14:39:39,574 INFO L125 PetriNetUnfolderBase]: For 310973/310979 co-relation queries the response was YES. [2024-06-04 14:39:39,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37386 conditions, 4499 events. 3029/4499 cut-off events. For 310973/310979 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 21707 event pairs, 793 based on Foata normal form. 10/4507 useless extension candidates. Maximal degree in co-relation 37315. Up to 4401 conditions per place. [2024-06-04 14:39:39,612 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 204 selfloop transitions, 25 changer transitions 0/232 dead transitions. [2024-06-04 14:39:39,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 232 transitions, 2458 flow [2024-06-04 14:39:39,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:39:39,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:39:39,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-04 14:39:39,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36511627906976746 [2024-06-04 14:39:39,614 INFO L175 Difference]: Start difference. First operand has 158 places, 194 transitions, 1804 flow. Second operand 10 states and 157 transitions. [2024-06-04 14:39:39,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 232 transitions, 2458 flow [2024-06-04 14:39:39,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 232 transitions, 2295 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-04 14:39:39,785 INFO L231 Difference]: Finished difference. Result has 161 places, 196 transitions, 1784 flow [2024-06-04 14:39:39,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1641, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1784, PETRI_PLACES=161, PETRI_TRANSITIONS=196} [2024-06-04 14:39:39,786 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 117 predicate places. [2024-06-04 14:39:39,786 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 196 transitions, 1784 flow [2024-06-04 14:39:39,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:39:39,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:39:39,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:39:39,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 14:39:39,786 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:39:39,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:39:39,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1189613526, now seen corresponding path program 6 times [2024-06-04 14:39:39,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:39:39,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762054496] [2024-06-04 14:39:39,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:39:39,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:39:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:39:42,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:39:42,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:39:42,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762054496] [2024-06-04 14:39:42,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762054496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:39:42,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:39:42,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:39:42,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234156552] [2024-06-04 14:39:42,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:39:42,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:39:42,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:39:42,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:39:42,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:39:42,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:39:42,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 196 transitions, 1784 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:39:42,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:39:42,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:39:42,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:39:44,266 INFO L124 PetriNetUnfolderBase]: 3138/4678 cut-off events. [2024-06-04 14:39:44,266 INFO L125 PetriNetUnfolderBase]: For 353504/353510 co-relation queries the response was YES. [2024-06-04 14:39:44,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39106 conditions, 4678 events. 3138/4678 cut-off events. For 353504/353510 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 22906 event pairs, 812 based on Foata normal form. 34/4710 useless extension candidates. Maximal degree in co-relation 39034. Up to 4339 conditions per place. [2024-06-04 14:39:44,307 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 207 selfloop transitions, 30 changer transitions 0/240 dead transitions. [2024-06-04 14:39:44,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 240 transitions, 2692 flow [2024-06-04 14:39:44,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:39:44,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:39:44,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-04 14:39:44,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-04 14:39:44,309 INFO L175 Difference]: Start difference. First operand has 161 places, 196 transitions, 1784 flow. Second operand 9 states and 157 transitions. [2024-06-04 14:39:44,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 240 transitions, 2692 flow [2024-06-04 14:39:44,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 240 transitions, 2567 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-04 14:39:44,506 INFO L231 Difference]: Finished difference. Result has 162 places, 198 transitions, 1827 flow [2024-06-04 14:39:44,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1659, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1827, PETRI_PLACES=162, PETRI_TRANSITIONS=198} [2024-06-04 14:39:44,507 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 118 predicate places. [2024-06-04 14:39:44,507 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 198 transitions, 1827 flow [2024-06-04 14:39:44,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:39:44,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:39:44,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:39:44,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 14:39:44,508 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:39:44,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:39:44,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1005242150, now seen corresponding path program 3 times [2024-06-04 14:39:44,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:39:44,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300429095] [2024-06-04 14:39:44,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:39:44,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:39:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:39:48,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:39:48,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:39:48,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300429095] [2024-06-04 14:39:48,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300429095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:39:48,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:39:48,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:39:48,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110954648] [2024-06-04 14:39:48,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:39:48,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:39:48,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:39:48,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:39:48,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:39:48,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:39:48,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 198 transitions, 1827 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:39:48,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:39:48,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:39:48,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:39:50,058 INFO L124 PetriNetUnfolderBase]: 3182/4742 cut-off events. [2024-06-04 14:39:50,058 INFO L125 PetriNetUnfolderBase]: For 350585/350591 co-relation queries the response was YES. [2024-06-04 14:39:50,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39874 conditions, 4742 events. 3182/4742 cut-off events. For 350585/350591 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 23385 event pairs, 817 based on Foata normal form. 10/4750 useless extension candidates. Maximal degree in co-relation 39801. Up to 4533 conditions per place. [2024-06-04 14:39:50,101 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 209 selfloop transitions, 36 changer transitions 0/248 dead transitions. [2024-06-04 14:39:50,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 248 transitions, 2722 flow [2024-06-04 14:39:50,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:39:50,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:39:50,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-04 14:39:50,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3883720930232558 [2024-06-04 14:39:50,102 INFO L175 Difference]: Start difference. First operand has 162 places, 198 transitions, 1827 flow. Second operand 10 states and 167 transitions. [2024-06-04 14:39:50,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 248 transitions, 2722 flow [2024-06-04 14:39:50,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 248 transitions, 2596 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-04 14:39:50,290 INFO L231 Difference]: Finished difference. Result has 167 places, 207 transitions, 1908 flow [2024-06-04 14:39:50,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1715, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1908, PETRI_PLACES=167, PETRI_TRANSITIONS=207} [2024-06-04 14:39:50,291 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 123 predicate places. [2024-06-04 14:39:50,291 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 207 transitions, 1908 flow [2024-06-04 14:39:50,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:39:50,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:39:50,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:39:50,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 14:39:50,291 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:39:50,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:39:50,292 INFO L85 PathProgramCache]: Analyzing trace with hash 844975122, now seen corresponding path program 4 times [2024-06-04 14:39:50,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:39:50,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275444325] [2024-06-04 14:39:50,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:39:50,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:39:50,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:39:53,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:39:53,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:39:53,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275444325] [2024-06-04 14:39:53,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275444325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:39:53,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:39:53,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:39:53,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666036547] [2024-06-04 14:39:53,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:39:53,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:39:53,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:39:53,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:39:53,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:39:53,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:39:53,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 207 transitions, 1908 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:39:53,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:39:53,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:39:53,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:39:55,517 INFO L124 PetriNetUnfolderBase]: 3172/4728 cut-off events. [2024-06-04 14:39:55,517 INFO L125 PetriNetUnfolderBase]: For 348987/348993 co-relation queries the response was YES. [2024-06-04 14:39:55,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39615 conditions, 4728 events. 3172/4728 cut-off events. For 348987/348993 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 23280 event pairs, 817 based on Foata normal form. 10/4736 useless extension candidates. Maximal degree in co-relation 39539. Up to 4525 conditions per place. [2024-06-04 14:39:55,559 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 206 selfloop transitions, 37 changer transitions 0/246 dead transitions. [2024-06-04 14:39:55,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 246 transitions, 2522 flow [2024-06-04 14:39:55,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:39:55,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:39:55,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-04 14:39:55,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.386046511627907 [2024-06-04 14:39:55,560 INFO L175 Difference]: Start difference. First operand has 167 places, 207 transitions, 1908 flow. Second operand 10 states and 166 transitions. [2024-06-04 14:39:55,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 246 transitions, 2522 flow [2024-06-04 14:39:55,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 246 transitions, 2384 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-04 14:39:55,740 INFO L231 Difference]: Finished difference. Result has 172 places, 207 transitions, 1852 flow [2024-06-04 14:39:55,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1770, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1852, PETRI_PLACES=172, PETRI_TRANSITIONS=207} [2024-06-04 14:39:55,740 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-04 14:39:55,741 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 207 transitions, 1852 flow [2024-06-04 14:39:55,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:39:55,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:39:55,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:39:55,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 14:39:55,741 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:39:55,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:39:55,742 INFO L85 PathProgramCache]: Analyzing trace with hash 650531534, now seen corresponding path program 2 times [2024-06-04 14:39:55,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:39:55,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367819016] [2024-06-04 14:39:55,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:39:55,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:39:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:39:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:39:57,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:39:57,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367819016] [2024-06-04 14:39:57,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367819016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:39:57,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:39:57,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:39:57,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544960851] [2024-06-04 14:39:57,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:39:57,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:39:57,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:39:57,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:39:57,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:39:57,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:39:57,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 207 transitions, 1852 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:57,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:39:57,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:39:57,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:39:59,187 INFO L124 PetriNetUnfolderBase]: 3182/4743 cut-off events. [2024-06-04 14:39:59,187 INFO L125 PetriNetUnfolderBase]: For 358789/358789 co-relation queries the response was YES. [2024-06-04 14:39:59,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39621 conditions, 4743 events. 3182/4743 cut-off events. For 358789/358789 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 23342 event pairs, 841 based on Foata normal form. 2/4743 useless extension candidates. Maximal degree in co-relation 39544. Up to 4615 conditions per place. [2024-06-04 14:39:59,227 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 194 selfloop transitions, 30 changer transitions 0/227 dead transitions. [2024-06-04 14:39:59,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 227 transitions, 2412 flow [2024-06-04 14:39:59,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:39:59,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:39:59,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-04 14:39:59,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3754152823920266 [2024-06-04 14:39:59,228 INFO L175 Difference]: Start difference. First operand has 172 places, 207 transitions, 1852 flow. Second operand 7 states and 113 transitions. [2024-06-04 14:39:59,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 227 transitions, 2412 flow [2024-06-04 14:39:59,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 227 transitions, 2296 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-04 14:39:59,459 INFO L231 Difference]: Finished difference. Result has 168 places, 210 transitions, 1868 flow [2024-06-04 14:39:59,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1736, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1868, PETRI_PLACES=168, PETRI_TRANSITIONS=210} [2024-06-04 14:39:59,460 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 124 predicate places. [2024-06-04 14:39:59,460 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 210 transitions, 1868 flow [2024-06-04 14:39:59,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:39:59,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:39:59,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:39:59,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 14:39:59,461 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:39:59,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:39:59,461 INFO L85 PathProgramCache]: Analyzing trace with hash 650531937, now seen corresponding path program 1 times [2024-06-04 14:39:59,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:39:59,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802297498] [2024-06-04 14:39:59,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:39:59,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:39:59,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:40:01,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:40:01,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:40:01,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802297498] [2024-06-04 14:40:01,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802297498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:40:01,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:40:01,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:40:01,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025257957] [2024-06-04 14:40:01,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:40:01,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:40:01,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:40:01,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:40:01,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:40:01,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:40:01,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 210 transitions, 1868 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:40:01,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:40:01,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:40:01,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:40:02,989 INFO L124 PetriNetUnfolderBase]: 3187/4749 cut-off events. [2024-06-04 14:40:02,989 INFO L125 PetriNetUnfolderBase]: For 371300/371306 co-relation queries the response was YES. [2024-06-04 14:40:03,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40117 conditions, 4749 events. 3187/4749 cut-off events. For 371300/371306 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 23344 event pairs, 836 based on Foata normal form. 7/4754 useless extension candidates. Maximal degree in co-relation 40041. Up to 4702 conditions per place. [2024-06-04 14:40:03,029 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 210 selfloop transitions, 17 changer transitions 0/230 dead transitions. [2024-06-04 14:40:03,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 230 transitions, 2422 flow [2024-06-04 14:40:03,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:40:03,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:40:03,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-04 14:40:03,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588039867109635 [2024-06-04 14:40:03,030 INFO L175 Difference]: Start difference. First operand has 168 places, 210 transitions, 1868 flow. Second operand 7 states and 108 transitions. [2024-06-04 14:40:03,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 230 transitions, 2422 flow [2024-06-04 14:40:03,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 230 transitions, 2312 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-04 14:40:03,233 INFO L231 Difference]: Finished difference. Result has 170 places, 213 transitions, 1848 flow [2024-06-04 14:40:03,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1758, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1848, PETRI_PLACES=170, PETRI_TRANSITIONS=213} [2024-06-04 14:40:03,233 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 126 predicate places. [2024-06-04 14:40:03,233 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 213 transitions, 1848 flow [2024-06-04 14:40:03,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:40:03,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:40:03,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:40:03,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 14:40:03,234 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:40:03,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:40:03,234 INFO L85 PathProgramCache]: Analyzing trace with hash -744725294, now seen corresponding path program 7 times [2024-06-04 14:40:03,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:40:03,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139012027] [2024-06-04 14:40:03,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:40:03,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:40:03,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:40:06,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:40:06,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:40:06,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139012027] [2024-06-04 14:40:06,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139012027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:40:06,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:40:06,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:40:06,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194206254] [2024-06-04 14:40:06,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:40:06,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:40:06,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:40:06,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:40:06,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:40:06,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:40:06,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 213 transitions, 1848 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:40:06,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:40:06,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:40:06,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:40:07,768 INFO L124 PetriNetUnfolderBase]: 3296/4929 cut-off events. [2024-06-04 14:40:07,768 INFO L125 PetriNetUnfolderBase]: For 425521/425540 co-relation queries the response was YES. [2024-06-04 14:40:07,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42331 conditions, 4929 events. 3296/4929 cut-off events. For 425521/425540 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 24614 event pairs, 832 based on Foata normal form. 44/4969 useless extension candidates. Maximal degree in co-relation 42254. Up to 4571 conditions per place. [2024-06-04 14:40:07,806 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 223 selfloop transitions, 31 changer transitions 0/257 dead transitions. [2024-06-04 14:40:07,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 257 transitions, 2848 flow [2024-06-04 14:40:07,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:40:07,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:40:07,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-04 14:40:07,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-04 14:40:07,807 INFO L175 Difference]: Start difference. First operand has 170 places, 213 transitions, 1848 flow. Second operand 9 states and 156 transitions. [2024-06-04 14:40:07,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 257 transitions, 2848 flow [2024-06-04 14:40:08,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 257 transitions, 2780 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-04 14:40:08,012 INFO L231 Difference]: Finished difference. Result has 174 places, 215 transitions, 1954 flow [2024-06-04 14:40:08,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1780, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1954, PETRI_PLACES=174, PETRI_TRANSITIONS=215} [2024-06-04 14:40:08,012 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 130 predicate places. [2024-06-04 14:40:08,012 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 215 transitions, 1954 flow [2024-06-04 14:40:08,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:40:08,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:40:08,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:40:08,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 14:40:08,013 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:40:08,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:40:08,013 INFO L85 PathProgramCache]: Analyzing trace with hash -744517532, now seen corresponding path program 5 times [2024-06-04 14:40:08,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:40:08,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143246455] [2024-06-04 14:40:08,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:40:08,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:40:08,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:40:11,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:40:11,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:40:11,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143246455] [2024-06-04 14:40:11,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143246455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:40:11,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:40:11,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:40:11,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174888632] [2024-06-04 14:40:11,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:40:11,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:40:11,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:40:11,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:40:11,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:40:11,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:40:11,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 215 transitions, 1954 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:40:11,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:40:11,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:40:11,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:40:13,574 INFO L124 PetriNetUnfolderBase]: 3340/4993 cut-off events. [2024-06-04 14:40:13,575 INFO L125 PetriNetUnfolderBase]: For 420290/420309 co-relation queries the response was YES. [2024-06-04 14:40:13,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43324 conditions, 4993 events. 3340/4993 cut-off events. For 420290/420309 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 25038 event pairs, 837 based on Foata normal form. 20/5009 useless extension candidates. Maximal degree in co-relation 43246. Up to 4765 conditions per place. [2024-06-04 14:40:13,615 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 225 selfloop transitions, 38 changer transitions 0/266 dead transitions. [2024-06-04 14:40:13,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 266 transitions, 2952 flow [2024-06-04 14:40:13,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:40:13,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:40:13,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-04 14:40:13,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.386046511627907 [2024-06-04 14:40:13,617 INFO L175 Difference]: Start difference. First operand has 174 places, 215 transitions, 1954 flow. Second operand 10 states and 166 transitions. [2024-06-04 14:40:13,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 266 transitions, 2952 flow [2024-06-04 14:40:13,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 266 transitions, 2816 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-04 14:40:13,834 INFO L231 Difference]: Finished difference. Result has 180 places, 226 transitions, 2061 flow [2024-06-04 14:40:13,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1836, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2061, PETRI_PLACES=180, PETRI_TRANSITIONS=226} [2024-06-04 14:40:13,835 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 136 predicate places. [2024-06-04 14:40:13,835 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 226 transitions, 2061 flow [2024-06-04 14:40:13,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:40:13,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:40:13,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:40:13,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 14:40:13,836 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:40:13,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:40:13,836 INFO L85 PathProgramCache]: Analyzing trace with hash -750231824, now seen corresponding path program 8 times [2024-06-04 14:40:13,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:40:13,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026007805] [2024-06-04 14:40:13,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:40:13,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:40:13,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:40:16,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:40:16,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:40:16,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026007805] [2024-06-04 14:40:16,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026007805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:40:16,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:40:16,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:40:16,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907941358] [2024-06-04 14:40:16,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:40:16,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:40:16,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:40:16,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:40:16,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:40:17,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:40:17,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 226 transitions, 2061 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:40:17,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:40:17,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:40:17,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:40:18,438 INFO L124 PetriNetUnfolderBase]: 3374/5050 cut-off events. [2024-06-04 14:40:18,438 INFO L125 PetriNetUnfolderBase]: For 433174/433187 co-relation queries the response was YES. [2024-06-04 14:40:18,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43948 conditions, 5050 events. 3374/5050 cut-off events. For 433174/433187 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 25398 event pairs, 835 based on Foata normal form. 14/5059 useless extension candidates. Maximal degree in co-relation 43866. Up to 4729 conditions per place. [2024-06-04 14:40:18,486 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 210 selfloop transitions, 48 changer transitions 0/261 dead transitions. [2024-06-04 14:40:18,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 261 transitions, 2801 flow [2024-06-04 14:40:18,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:40:18,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:40:18,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-04 14:40:18,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-04 14:40:18,488 INFO L175 Difference]: Start difference. First operand has 180 places, 226 transitions, 2061 flow. Second operand 9 states and 150 transitions. [2024-06-04 14:40:18,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 261 transitions, 2801 flow [2024-06-04 14:40:18,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 261 transitions, 2694 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-04 14:40:18,758 INFO L231 Difference]: Finished difference. Result has 184 places, 228 transitions, 2165 flow [2024-06-04 14:40:18,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1954, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2165, PETRI_PLACES=184, PETRI_TRANSITIONS=228} [2024-06-04 14:40:18,758 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-04 14:40:18,758 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 228 transitions, 2165 flow [2024-06-04 14:40:18,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:40:18,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:40:18,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:40:18,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 14:40:18,759 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:40:18,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:40:18,759 INFO L85 PathProgramCache]: Analyzing trace with hash -750081722, now seen corresponding path program 6 times [2024-06-04 14:40:18,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:40:18,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922667407] [2024-06-04 14:40:18,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:40:18,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:40:18,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:40:22,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:40:22,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:40:22,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922667407] [2024-06-04 14:40:22,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922667407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:40:22,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:40:22,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:40:22,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577132565] [2024-06-04 14:40:22,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:40:22,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:40:22,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:40:22,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:40:22,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:40:22,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:40:22,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 228 transitions, 2165 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:40:22,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:40:22,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:40:22,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:40:23,854 INFO L124 PetriNetUnfolderBase]: 3380/5059 cut-off events. [2024-06-04 14:40:23,854 INFO L125 PetriNetUnfolderBase]: For 445757/445770 co-relation queries the response was YES. [2024-06-04 14:40:23,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44378 conditions, 5059 events. 3380/5059 cut-off events. For 445757/445770 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 25471 event pairs, 831 based on Foata normal form. 10/5064 useless extension candidates. Maximal degree in co-relation 44295. Up to 4761 conditions per place. [2024-06-04 14:40:23,904 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 215 selfloop transitions, 52 changer transitions 0/270 dead transitions. [2024-06-04 14:40:23,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 270 transitions, 2952 flow [2024-06-04 14:40:23,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:40:23,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:40:23,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-04 14:40:23,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3813953488372093 [2024-06-04 14:40:23,906 INFO L175 Difference]: Start difference. First operand has 184 places, 228 transitions, 2165 flow. Second operand 10 states and 164 transitions. [2024-06-04 14:40:23,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 270 transitions, 2952 flow [2024-06-04 14:40:24,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 270 transitions, 2756 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-04 14:40:24,182 INFO L231 Difference]: Finished difference. Result has 188 places, 234 transitions, 2232 flow [2024-06-04 14:40:24,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1972, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2232, PETRI_PLACES=188, PETRI_TRANSITIONS=234} [2024-06-04 14:40:24,183 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 144 predicate places. [2024-06-04 14:40:24,183 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 234 transitions, 2232 flow [2024-06-04 14:40:24,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:40:24,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:40:24,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:40:24,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 14:40:24,183 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:40:24,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:40:24,184 INFO L85 PathProgramCache]: Analyzing trace with hash -543428282, now seen corresponding path program 7 times [2024-06-04 14:40:24,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:40:24,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940677136] [2024-06-04 14:40:24,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:40:24,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:40:24,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:40:28,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:40:28,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:40:28,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940677136] [2024-06-04 14:40:28,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940677136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:40:28,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:40:28,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:40:28,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881518163] [2024-06-04 14:40:28,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:40:28,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:40:28,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:40:28,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:40:28,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:40:28,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:40:28,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 234 transitions, 2232 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:40:28,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:40:28,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:40:28,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:40:30,175 INFO L124 PetriNetUnfolderBase]: 3435/5136 cut-off events. [2024-06-04 14:40:30,175 INFO L125 PetriNetUnfolderBase]: For 449663/449682 co-relation queries the response was YES. [2024-06-04 14:40:30,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45360 conditions, 5136 events. 3435/5136 cut-off events. For 449663/449682 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 26064 event pairs, 739 based on Foata normal form. 20/5152 useless extension candidates. Maximal degree in co-relation 45275. Up to 4778 conditions per place. [2024-06-04 14:40:30,224 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 228 selfloop transitions, 65 changer transitions 0/296 dead transitions. [2024-06-04 14:40:30,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 296 transitions, 3235 flow [2024-06-04 14:40:30,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:40:30,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:40:30,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-04 14:40:30,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3813953488372093 [2024-06-04 14:40:30,226 INFO L175 Difference]: Start difference. First operand has 188 places, 234 transitions, 2232 flow. Second operand 10 states and 164 transitions. [2024-06-04 14:40:30,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 296 transitions, 3235 flow [2024-06-04 14:40:30,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 296 transitions, 3019 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-04 14:40:30,509 INFO L231 Difference]: Finished difference. Result has 194 places, 256 transitions, 2493 flow [2024-06-04 14:40:30,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2016, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2493, PETRI_PLACES=194, PETRI_TRANSITIONS=256} [2024-06-04 14:40:30,510 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 150 predicate places. [2024-06-04 14:40:30,510 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 256 transitions, 2493 flow [2024-06-04 14:40:30,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:40:30,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:40:30,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:40:30,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 14:40:30,511 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:40:30,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:40:30,512 INFO L85 PathProgramCache]: Analyzing trace with hash -2064203181, now seen corresponding path program 2 times [2024-06-04 14:40:30,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:40:30,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400564917] [2024-06-04 14:40:30,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:40:30,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:40:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:40:33,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:40:33,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:40:33,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400564917] [2024-06-04 14:40:33,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400564917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:40:33,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:40:33,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:40:33,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246907126] [2024-06-04 14:40:33,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:40:33,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:40:33,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:40:33,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:40:33,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:40:34,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:40:34,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 256 transitions, 2493 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:40:34,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:40:34,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:40:34,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:40:35,598 INFO L124 PetriNetUnfolderBase]: 3463/5179 cut-off events. [2024-06-04 14:40:35,598 INFO L125 PetriNetUnfolderBase]: For 467069/467088 co-relation queries the response was YES. [2024-06-04 14:40:35,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46475 conditions, 5179 events. 3463/5179 cut-off events. For 467069/467088 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 26266 event pairs, 798 based on Foata normal form. 20/5195 useless extension candidates. Maximal degree in co-relation 46386. Up to 4958 conditions per place. [2024-06-04 14:40:35,647 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 237 selfloop transitions, 54 changer transitions 0/294 dead transitions. [2024-06-04 14:40:35,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 294 transitions, 3337 flow [2024-06-04 14:40:35,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:40:35,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:40:35,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-04 14:40:35,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772609819121447 [2024-06-04 14:40:35,648 INFO L175 Difference]: Start difference. First operand has 194 places, 256 transitions, 2493 flow. Second operand 9 states and 146 transitions. [2024-06-04 14:40:35,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 294 transitions, 3337 flow [2024-06-04 14:40:36,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 294 transitions, 3183 flow, removed 66 selfloop flow, removed 3 redundant places. [2024-06-04 14:40:36,009 INFO L231 Difference]: Finished difference. Result has 201 places, 264 transitions, 2642 flow [2024-06-04 14:40:36,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2345, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2642, PETRI_PLACES=201, PETRI_TRANSITIONS=264} [2024-06-04 14:40:36,010 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 157 predicate places. [2024-06-04 14:40:36,010 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 264 transitions, 2642 flow [2024-06-04 14:40:36,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:40:36,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:40:36,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:40:36,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 14:40:36,010 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:40:36,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:40:36,011 INFO L85 PathProgramCache]: Analyzing trace with hash -750235544, now seen corresponding path program 9 times [2024-06-04 14:40:36,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:40:36,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080174377] [2024-06-04 14:40:36,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:40:36,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:40:36,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:40:39,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:40:39,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:40:39,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080174377] [2024-06-04 14:40:39,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080174377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:40:39,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:40:39,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:40:39,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090119659] [2024-06-04 14:40:39,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:40:39,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:40:39,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:40:39,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:40:39,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:40:39,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:40:39,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 264 transitions, 2642 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:40:39,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:40:39,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:40:39,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:40:40,791 INFO L124 PetriNetUnfolderBase]: 3497/5236 cut-off events. [2024-06-04 14:40:40,791 INFO L125 PetriNetUnfolderBase]: For 488869/488882 co-relation queries the response was YES. [2024-06-04 14:40:40,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46739 conditions, 5236 events. 3497/5236 cut-off events. For 488869/488882 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 26631 event pairs, 750 based on Foata normal form. 14/5245 useless extension candidates. Maximal degree in co-relation 46647. Up to 4943 conditions per place. [2024-06-04 14:40:40,837 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 248 selfloop transitions, 47 changer transitions 0/298 dead transitions. [2024-06-04 14:40:40,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 298 transitions, 3448 flow [2024-06-04 14:40:40,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:40:40,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:40:40,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-04 14:40:40,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38242894056847543 [2024-06-04 14:40:40,839 INFO L175 Difference]: Start difference. First operand has 201 places, 264 transitions, 2642 flow. Second operand 9 states and 148 transitions. [2024-06-04 14:40:40,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 298 transitions, 3448 flow [2024-06-04 14:40:41,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 298 transitions, 3282 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-04 14:40:41,198 INFO L231 Difference]: Finished difference. Result has 206 places, 266 transitions, 2693 flow [2024-06-04 14:40:41,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2476, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2693, PETRI_PLACES=206, PETRI_TRANSITIONS=266} [2024-06-04 14:40:41,199 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 162 predicate places. [2024-06-04 14:40:41,199 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 266 transitions, 2693 flow [2024-06-04 14:40:41,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:40:41,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:40:41,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:40:41,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 14:40:41,199 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:40:41,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:40:41,200 INFO L85 PathProgramCache]: Analyzing trace with hash -744509813, now seen corresponding path program 3 times [2024-06-04 14:40:41,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:40:41,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939898923] [2024-06-04 14:40:41,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:40:41,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:40:41,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:40:44,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:40:44,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:40:44,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939898923] [2024-06-04 14:40:44,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939898923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:40:44,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:40:44,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:40:44,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403873476] [2024-06-04 14:40:44,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:40:44,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:40:44,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:40:44,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:40:44,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:40:45,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:40:45,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 266 transitions, 2693 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:40:45,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:40:45,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:40:45,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:40:46,664 INFO L124 PetriNetUnfolderBase]: 3514/5260 cut-off events. [2024-06-04 14:40:46,664 INFO L125 PetriNetUnfolderBase]: For 501625/501644 co-relation queries the response was YES. [2024-06-04 14:40:46,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47310 conditions, 5260 events. 3514/5260 cut-off events. For 501625/501644 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 26767 event pairs, 799 based on Foata normal form. 20/5276 useless extension candidates. Maximal degree in co-relation 47217. Up to 5143 conditions per place. [2024-06-04 14:40:46,715 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 268 selfloop transitions, 28 changer transitions 0/299 dead transitions. [2024-06-04 14:40:46,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 299 transitions, 3498 flow [2024-06-04 14:40:46,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:40:46,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:40:46,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-04 14:40:46,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695090439276486 [2024-06-04 14:40:46,717 INFO L175 Difference]: Start difference. First operand has 206 places, 266 transitions, 2693 flow. Second operand 9 states and 143 transitions. [2024-06-04 14:40:46,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 299 transitions, 3498 flow [2024-06-04 14:40:47,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 299 transitions, 3288 flow, removed 54 selfloop flow, removed 8 redundant places. [2024-06-04 14:40:47,084 INFO L231 Difference]: Finished difference. Result has 207 places, 268 transitions, 2652 flow [2024-06-04 14:40:47,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2483, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2652, PETRI_PLACES=207, PETRI_TRANSITIONS=268} [2024-06-04 14:40:47,085 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-04 14:40:47,085 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 268 transitions, 2652 flow [2024-06-04 14:40:47,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:40:47,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:40:47,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:40:47,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 14:40:47,085 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:40:47,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:40:47,086 INFO L85 PathProgramCache]: Analyzing trace with hash -744719342, now seen corresponding path program 8 times [2024-06-04 14:40:47,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:40:47,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054736984] [2024-06-04 14:40:47,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:40:47,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:40:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:40:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:40:50,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:40:50,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054736984] [2024-06-04 14:40:50,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054736984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:40:50,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:40:50,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:40:50,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562287536] [2024-06-04 14:40:50,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:40:50,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:40:50,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:40:50,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:40:50,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:40:50,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:40:50,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 268 transitions, 2652 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:40:50,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:40:50,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:40:50,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:40:51,817 INFO L124 PetriNetUnfolderBase]: 3504/5246 cut-off events. [2024-06-04 14:40:51,818 INFO L125 PetriNetUnfolderBase]: For 506524/506543 co-relation queries the response was YES. [2024-06-04 14:40:51,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46888 conditions, 5246 events. 3504/5246 cut-off events. For 506524/506543 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 26724 event pairs, 777 based on Foata normal form. 20/5262 useless extension candidates. Maximal degree in co-relation 46795. Up to 5024 conditions per place. [2024-06-04 14:40:51,867 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 260 selfloop transitions, 43 changer transitions 0/306 dead transitions. [2024-06-04 14:40:51,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 306 transitions, 3395 flow [2024-06-04 14:40:51,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:40:51,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:40:51,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-04 14:40:51,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-04 14:40:51,869 INFO L175 Difference]: Start difference. First operand has 207 places, 268 transitions, 2652 flow. Second operand 10 states and 165 transitions. [2024-06-04 14:40:51,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 306 transitions, 3395 flow [2024-06-04 14:40:52,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 306 transitions, 3206 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-04 14:40:52,279 INFO L231 Difference]: Finished difference. Result has 211 places, 268 transitions, 2557 flow [2024-06-04 14:40:52,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2463, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2557, PETRI_PLACES=211, PETRI_TRANSITIONS=268} [2024-06-04 14:40:52,279 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 167 predicate places. [2024-06-04 14:40:52,279 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 268 transitions, 2557 flow [2024-06-04 14:40:52,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:40:52,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:40:52,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:40:52,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 14:40:52,280 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:40:52,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:40:52,281 INFO L85 PathProgramCache]: Analyzing trace with hash -2003485045, now seen corresponding path program 4 times [2024-06-04 14:40:52,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:40:52,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204599583] [2024-06-04 14:40:52,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:40:52,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:40:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:40:55,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:40:55,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:40:55,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204599583] [2024-06-04 14:40:55,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204599583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:40:55,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:40:55,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:40:55,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656193603] [2024-06-04 14:40:55,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:40:55,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:40:55,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:40:55,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:40:55,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:40:55,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:40:55,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 268 transitions, 2557 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:40:55,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:40:55,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:40:55,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:40:57,468 INFO L124 PetriNetUnfolderBase]: 3521/5273 cut-off events. [2024-06-04 14:40:57,468 INFO L125 PetriNetUnfolderBase]: For 522195/522214 co-relation queries the response was YES. [2024-06-04 14:40:57,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47281 conditions, 5273 events. 3521/5273 cut-off events. For 522195/522214 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 26935 event pairs, 756 based on Foata normal form. 20/5289 useless extension candidates. Maximal degree in co-relation 47187. Up to 4951 conditions per place. [2024-06-04 14:40:57,518 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 240 selfloop transitions, 68 changer transitions 0/311 dead transitions. [2024-06-04 14:40:57,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 311 transitions, 3736 flow [2024-06-04 14:40:57,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:40:57,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:40:57,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-04 14:40:57,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3767441860465116 [2024-06-04 14:40:57,520 INFO L175 Difference]: Start difference. First operand has 211 places, 268 transitions, 2557 flow. Second operand 10 states and 162 transitions. [2024-06-04 14:40:57,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 311 transitions, 3736 flow [2024-06-04 14:40:57,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 311 transitions, 3604 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-04 14:40:57,855 INFO L231 Difference]: Finished difference. Result has 211 places, 274 transitions, 2811 flow [2024-06-04 14:40:57,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2430, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2811, PETRI_PLACES=211, PETRI_TRANSITIONS=274} [2024-06-04 14:40:57,856 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 167 predicate places. [2024-06-04 14:40:57,856 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 274 transitions, 2811 flow [2024-06-04 14:40:57,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:40:57,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:40:57,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:40:57,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 14:40:57,857 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:40:57,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:40:57,857 INFO L85 PathProgramCache]: Analyzing trace with hash 2025243060, now seen corresponding path program 10 times [2024-06-04 14:40:57,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:40:57,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411144490] [2024-06-04 14:40:57,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:40:57,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:40:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:01,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:41:01,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:01,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411144490] [2024-06-04 14:41:01,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411144490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:01,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:01,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:41:01,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825879492] [2024-06-04 14:41:01,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:01,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:41:01,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:01,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:41:01,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:41:01,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:41:01,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 274 transitions, 2811 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:41:01,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:01,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:41:01,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:02,728 INFO L124 PetriNetUnfolderBase]: 3580/5374 cut-off events. [2024-06-04 14:41:02,728 INFO L125 PetriNetUnfolderBase]: For 576651/576670 co-relation queries the response was YES. [2024-06-04 14:41:02,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48311 conditions, 5374 events. 3580/5374 cut-off events. For 576651/576670 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 27619 event pairs, 781 based on Foata normal form. 44/5414 useless extension candidates. Maximal degree in co-relation 48217. Up to 4615 conditions per place. [2024-06-04 14:41:02,776 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 220 selfloop transitions, 94 changer transitions 0/317 dead transitions. [2024-06-04 14:41:02,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 317 transitions, 3964 flow [2024-06-04 14:41:02,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:41:02,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:41:02,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-04 14:41:02,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-04 14:41:02,778 INFO L175 Difference]: Start difference. First operand has 211 places, 274 transitions, 2811 flow. Second operand 9 states and 161 transitions. [2024-06-04 14:41:02,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 317 transitions, 3964 flow [2024-06-04 14:41:03,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 317 transitions, 3786 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-04 14:41:03,137 INFO L231 Difference]: Finished difference. Result has 215 places, 276 transitions, 2962 flow [2024-06-04 14:41:03,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2639, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2962, PETRI_PLACES=215, PETRI_TRANSITIONS=276} [2024-06-04 14:41:03,138 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 171 predicate places. [2024-06-04 14:41:03,138 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 276 transitions, 2962 flow [2024-06-04 14:41:03,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:41:03,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:03,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:03,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 14:41:03,139 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:41:03,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:03,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1878760390, now seen corresponding path program 9 times [2024-06-04 14:41:03,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:03,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44608425] [2024-06-04 14:41:03,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:03,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:03,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:06,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:41:06,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:06,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44608425] [2024-06-04 14:41:06,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44608425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:06,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:06,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:41:06,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610665922] [2024-06-04 14:41:06,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:06,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:41:06,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:06,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:41:06,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:41:06,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:41:06,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 276 transitions, 2962 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:41:06,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:06,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:41:06,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:08,165 INFO L124 PetriNetUnfolderBase]: 3624/5438 cut-off events. [2024-06-04 14:41:08,165 INFO L125 PetriNetUnfolderBase]: For 559918/559937 co-relation queries the response was YES. [2024-06-04 14:41:08,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49265 conditions, 5438 events. 3624/5438 cut-off events. For 559918/559937 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 28049 event pairs, 781 based on Foata normal form. 20/5454 useless extension candidates. Maximal degree in co-relation 49170. Up to 4814 conditions per place. [2024-06-04 14:41:08,216 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 221 selfloop transitions, 99 changer transitions 0/323 dead transitions. [2024-06-04 14:41:08,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 323 transitions, 4066 flow [2024-06-04 14:41:08,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:41:08,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:41:08,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-04 14:41:08,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-04 14:41:08,218 INFO L175 Difference]: Start difference. First operand has 215 places, 276 transitions, 2962 flow. Second operand 10 states and 172 transitions. [2024-06-04 14:41:08,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 323 transitions, 4066 flow [2024-06-04 14:41:08,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 323 transitions, 3796 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-04 14:41:08,720 INFO L231 Difference]: Finished difference. Result has 218 places, 282 transitions, 3003 flow [2024-06-04 14:41:08,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2703, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3003, PETRI_PLACES=218, PETRI_TRANSITIONS=282} [2024-06-04 14:41:08,721 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-04 14:41:08,721 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 282 transitions, 3003 flow [2024-06-04 14:41:08,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:41:08,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:08,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:08,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 14:41:08,722 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:41:08,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:08,722 INFO L85 PathProgramCache]: Analyzing trace with hash 2025450822, now seen corresponding path program 10 times [2024-06-04 14:41:08,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:08,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572826124] [2024-06-04 14:41:08,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:08,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:11,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:41:11,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:11,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572826124] [2024-06-04 14:41:11,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572826124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:11,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:11,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:41:11,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524301527] [2024-06-04 14:41:11,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:11,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:41:11,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:11,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:41:11,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:41:12,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:41:12,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 282 transitions, 3003 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:41:12,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:12,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:41:12,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:13,941 INFO L124 PetriNetUnfolderBase]: 3636/5456 cut-off events. [2024-06-04 14:41:13,941 INFO L125 PetriNetUnfolderBase]: For 549601/549620 co-relation queries the response was YES. [2024-06-04 14:41:13,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48552 conditions, 5456 events. 3636/5456 cut-off events. For 549601/549620 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 28163 event pairs, 786 based on Foata normal form. 20/5472 useless extension candidates. Maximal degree in co-relation 48456. Up to 4825 conditions per place. [2024-06-04 14:41:13,996 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 223 selfloop transitions, 98 changer transitions 0/324 dead transitions. [2024-06-04 14:41:13,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 324 transitions, 3811 flow [2024-06-04 14:41:13,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:41:13,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:41:13,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-04 14:41:13,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39767441860465114 [2024-06-04 14:41:13,998 INFO L175 Difference]: Start difference. First operand has 218 places, 282 transitions, 3003 flow. Second operand 10 states and 171 transitions. [2024-06-04 14:41:13,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 324 transitions, 3811 flow [2024-06-04 14:41:14,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 324 transitions, 3489 flow, removed 53 selfloop flow, removed 8 redundant places. [2024-06-04 14:41:14,547 INFO L231 Difference]: Finished difference. Result has 220 places, 285 transitions, 2914 flow [2024-06-04 14:41:14,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2687, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2914, PETRI_PLACES=220, PETRI_TRANSITIONS=285} [2024-06-04 14:41:14,547 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 176 predicate places. [2024-06-04 14:41:14,547 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 285 transitions, 2914 flow [2024-06-04 14:41:14,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:41:14,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:14,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:14,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 14:41:14,548 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:41:14,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:14,548 INFO L85 PathProgramCache]: Analyzing trace with hash 2025458541, now seen corresponding path program 5 times [2024-06-04 14:41:14,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:14,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519515325] [2024-06-04 14:41:14,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:14,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:14,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:18,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:41:18,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:18,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519515325] [2024-06-04 14:41:18,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519515325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:18,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:18,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:41:18,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983018850] [2024-06-04 14:41:18,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:18,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:41:18,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:18,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:41:18,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:41:18,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:41:18,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 285 transitions, 2914 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:41:18,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:18,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:41:18,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:19,976 INFO L124 PetriNetUnfolderBase]: 3628/5444 cut-off events. [2024-06-04 14:41:19,976 INFO L125 PetriNetUnfolderBase]: For 557152/557171 co-relation queries the response was YES. [2024-06-04 14:41:20,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48129 conditions, 5444 events. 3628/5444 cut-off events. For 557152/557171 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 28028 event pairs, 814 based on Foata normal form. 20/5460 useless extension candidates. Maximal degree in co-relation 48033. Up to 5264 conditions per place. [2024-06-04 14:41:20,030 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 270 selfloop transitions, 47 changer transitions 0/320 dead transitions. [2024-06-04 14:41:20,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 320 transitions, 3667 flow [2024-06-04 14:41:20,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:41:20,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:41:20,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-04 14:41:20,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3697674418604651 [2024-06-04 14:41:20,031 INFO L175 Difference]: Start difference. First operand has 220 places, 285 transitions, 2914 flow. Second operand 10 states and 159 transitions. [2024-06-04 14:41:20,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 320 transitions, 3667 flow [2024-06-04 14:41:20,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 320 transitions, 3355 flow, removed 60 selfloop flow, removed 9 redundant places. [2024-06-04 14:41:20,488 INFO L231 Difference]: Finished difference. Result has 221 places, 286 transitions, 2714 flow [2024-06-04 14:41:20,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2602, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2714, PETRI_PLACES=221, PETRI_TRANSITIONS=286} [2024-06-04 14:41:20,489 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 177 predicate places. [2024-06-04 14:41:20,489 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 286 transitions, 2714 flow [2024-06-04 14:41:20,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 14:41:20,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:20,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:20,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 14:41:20,490 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:41:20,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:20,490 INFO L85 PathProgramCache]: Analyzing trace with hash -164958816, now seen corresponding path program 3 times [2024-06-04 14:41:20,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:20,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727956768] [2024-06-04 14:41:20,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:20,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:22,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:41:22,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:22,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727956768] [2024-06-04 14:41:22,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727956768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:22,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:22,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:41:22,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358265950] [2024-06-04 14:41:22,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:22,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:41:22,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:22,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:41:22,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:41:22,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:41:22,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 286 transitions, 2714 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:22,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:22,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:41:22,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:23,911 INFO L124 PetriNetUnfolderBase]: 3622/5439 cut-off events. [2024-06-04 14:41:23,911 INFO L125 PetriNetUnfolderBase]: For 542872/542885 co-relation queries the response was YES. [2024-06-04 14:41:23,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46932 conditions, 5439 events. 3622/5439 cut-off events. For 542872/542885 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 28029 event pairs, 829 based on Foata normal form. 8/5442 useless extension candidates. Maximal degree in co-relation 46838. Up to 5296 conditions per place. [2024-06-04 14:41:23,967 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 261 selfloop transitions, 37 changer transitions 0/301 dead transitions. [2024-06-04 14:41:23,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 301 transitions, 3414 flow [2024-06-04 14:41:23,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:41:23,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:41:23,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-04 14:41:23,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36212624584717606 [2024-06-04 14:41:23,969 INFO L175 Difference]: Start difference. First operand has 221 places, 286 transitions, 2714 flow. Second operand 7 states and 109 transitions. [2024-06-04 14:41:23,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 301 transitions, 3414 flow [2024-06-04 14:41:24,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 301 transitions, 3265 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-04 14:41:24,573 INFO L231 Difference]: Finished difference. Result has 220 places, 289 transitions, 2719 flow [2024-06-04 14:41:24,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2565, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2719, PETRI_PLACES=220, PETRI_TRANSITIONS=289} [2024-06-04 14:41:24,574 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 176 predicate places. [2024-06-04 14:41:24,574 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 289 transitions, 2719 flow [2024-06-04 14:41:24,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:24,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:24,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:24,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 14:41:24,575 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:41:24,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:24,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1030154375, now seen corresponding path program 2 times [2024-06-04 14:41:24,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:24,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922967339] [2024-06-04 14:41:24,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:24,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:24,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:26,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:41:26,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:26,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922967339] [2024-06-04 14:41:26,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922967339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:26,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:26,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:41:26,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935067624] [2024-06-04 14:41:26,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:26,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:41:26,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:26,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:41:26,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:41:27,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:41:27,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 289 transitions, 2719 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:27,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:27,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:41:27,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:28,247 INFO L124 PetriNetUnfolderBase]: 3627/5443 cut-off events. [2024-06-04 14:41:28,247 INFO L125 PetriNetUnfolderBase]: For 556487/556506 co-relation queries the response was YES. [2024-06-04 14:41:28,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47459 conditions, 5443 events. 3627/5443 cut-off events. For 556487/556506 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 28009 event pairs, 813 based on Foata normal form. 17/5456 useless extension candidates. Maximal degree in co-relation 47364. Up to 5389 conditions per place. [2024-06-04 14:41:28,303 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 279 selfloop transitions, 22 changer transitions 0/304 dead transitions. [2024-06-04 14:41:28,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 304 transitions, 3419 flow [2024-06-04 14:41:28,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:41:28,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:41:28,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-04 14:41:28,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34551495016611294 [2024-06-04 14:41:28,304 INFO L175 Difference]: Start difference. First operand has 220 places, 289 transitions, 2719 flow. Second operand 7 states and 104 transitions. [2024-06-04 14:41:28,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 304 transitions, 3419 flow [2024-06-04 14:41:28,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 304 transitions, 3287 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-04 14:41:28,786 INFO L231 Difference]: Finished difference. Result has 222 places, 292 transitions, 2701 flow [2024-06-04 14:41:28,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2587, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2701, PETRI_PLACES=222, PETRI_TRANSITIONS=292} [2024-06-04 14:41:28,787 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 178 predicate places. [2024-06-04 14:41:28,787 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 292 transitions, 2701 flow [2024-06-04 14:41:28,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:28,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:28,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:28,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 14:41:28,787 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:41:28,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:28,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1030599845, now seen corresponding path program 3 times [2024-06-04 14:41:28,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:28,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626277026] [2024-06-04 14:41:28,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:28,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:31,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:41:31,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:31,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626277026] [2024-06-04 14:41:31,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626277026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:31,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:31,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:41:31,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822684137] [2024-06-04 14:41:31,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:31,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:41:31,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:31,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:41:31,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:41:31,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:41:31,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 292 transitions, 2701 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:31,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:31,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:41:31,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:32,450 INFO L124 PetriNetUnfolderBase]: 3624/5439 cut-off events. [2024-06-04 14:41:32,450 INFO L125 PetriNetUnfolderBase]: For 568640/568659 co-relation queries the response was YES. [2024-06-04 14:41:32,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47803 conditions, 5439 events. 3624/5439 cut-off events. For 568640/568659 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 27934 event pairs, 813 based on Foata normal form. 17/5452 useless extension candidates. Maximal degree in co-relation 47707. Up to 5376 conditions per place. [2024-06-04 14:41:32,503 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 277 selfloop transitions, 30 changer transitions 0/310 dead transitions. [2024-06-04 14:41:32,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 310 transitions, 3433 flow [2024-06-04 14:41:32,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:41:32,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:41:32,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-04 14:41:32,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3488372093023256 [2024-06-04 14:41:32,504 INFO L175 Difference]: Start difference. First operand has 222 places, 292 transitions, 2701 flow. Second operand 7 states and 105 transitions. [2024-06-04 14:41:32,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 310 transitions, 3433 flow [2024-06-04 14:41:32,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 310 transitions, 3341 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-04 14:41:32,994 INFO L231 Difference]: Finished difference. Result has 225 places, 298 transitions, 2775 flow [2024-06-04 14:41:32,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2609, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2775, PETRI_PLACES=225, PETRI_TRANSITIONS=298} [2024-06-04 14:41:32,995 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-04 14:41:32,995 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 298 transitions, 2775 flow [2024-06-04 14:41:32,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:32,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:32,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:32,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 14:41:32,995 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:41:32,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:32,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1022981440, now seen corresponding path program 1 times [2024-06-04 14:41:32,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:32,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778926990] [2024-06-04 14:41:32,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:32,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:33,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:35,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:41:35,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:35,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778926990] [2024-06-04 14:41:35,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778926990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:35,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:35,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:41:35,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785823302] [2024-06-04 14:41:35,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:35,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:41:35,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:35,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:41:35,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:41:35,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-04 14:41:35,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 298 transitions, 2775 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-04 14:41:35,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:35,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-04 14:41:35,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:36,515 INFO L124 PetriNetUnfolderBase]: 3468/5290 cut-off events. [2024-06-04 14:41:36,515 INFO L125 PetriNetUnfolderBase]: For 587158/587158 co-relation queries the response was YES. [2024-06-04 14:41:36,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47245 conditions, 5290 events. 3468/5290 cut-off events. For 587158/587158 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 27842 event pairs, 771 based on Foata normal form. 3/5291 useless extension candidates. Maximal degree in co-relation 47147. Up to 5114 conditions per place. [2024-06-04 14:41:36,566 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 297 selfloop transitions, 14 changer transitions 0/319 dead transitions. [2024-06-04 14:41:36,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 319 transitions, 3545 flow [2024-06-04 14:41:36,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:41:36,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:41:36,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-04 14:41:36,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-04 14:41:36,568 INFO L175 Difference]: Start difference. First operand has 225 places, 298 transitions, 2775 flow. Second operand 7 states and 116 transitions. [2024-06-04 14:41:36,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 319 transitions, 3545 flow [2024-06-04 14:41:37,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 319 transitions, 3465 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-04 14:41:37,054 INFO L231 Difference]: Finished difference. Result has 229 places, 301 transitions, 2787 flow [2024-06-04 14:41:37,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2695, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2787, PETRI_PLACES=229, PETRI_TRANSITIONS=301} [2024-06-04 14:41:37,055 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 185 predicate places. [2024-06-04 14:41:37,055 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 301 transitions, 2787 flow [2024-06-04 14:41:37,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-04 14:41:37,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:37,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:37,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 14:41:37,055 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:41:37,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:37,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1022987020, now seen corresponding path program 2 times [2024-06-04 14:41:37,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:37,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114042238] [2024-06-04 14:41:37,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:37,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:37,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:39,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:41:39,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:39,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114042238] [2024-06-04 14:41:39,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114042238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:39,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:39,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:41:39,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899820824] [2024-06-04 14:41:39,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:39,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:41:39,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:39,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:41:39,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:41:39,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-04 14:41:39,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 301 transitions, 2787 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-04 14:41:39,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:39,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-04 14:41:39,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:40,665 INFO L124 PetriNetUnfolderBase]: 3483/5311 cut-off events. [2024-06-04 14:41:40,666 INFO L125 PetriNetUnfolderBase]: For 603287/603287 co-relation queries the response was YES. [2024-06-04 14:41:40,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48068 conditions, 5311 events. 3483/5311 cut-off events. For 603287/603287 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 27919 event pairs, 771 based on Foata normal form. 3/5312 useless extension candidates. Maximal degree in co-relation 47968. Up to 5141 conditions per place. [2024-06-04 14:41:40,715 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 297 selfloop transitions, 14 changer transitions 0/319 dead transitions. [2024-06-04 14:41:40,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 319 transitions, 3553 flow [2024-06-04 14:41:40,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:41:40,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:41:40,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-04 14:41:40,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3754152823920266 [2024-06-04 14:41:40,717 INFO L175 Difference]: Start difference. First operand has 229 places, 301 transitions, 2787 flow. Second operand 7 states and 113 transitions. [2024-06-04 14:41:40,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 319 transitions, 3553 flow [2024-06-04 14:41:41,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 319 transitions, 3483 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-04 14:41:41,122 INFO L231 Difference]: Finished difference. Result has 231 places, 304 transitions, 2815 flow [2024-06-04 14:41:41,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2717, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2815, PETRI_PLACES=231, PETRI_TRANSITIONS=304} [2024-06-04 14:41:41,123 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-04 14:41:41,123 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 304 transitions, 2815 flow [2024-06-04 14:41:41,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-04 14:41:41,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:41,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:41,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 14:41:41,124 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:41:41,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:41,125 INFO L85 PathProgramCache]: Analyzing trace with hash 560568419, now seen corresponding path program 1 times [2024-06-04 14:41:41,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:41,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579509198] [2024-06-04 14:41:41,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:41,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:41,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:41:43,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:43,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579509198] [2024-06-04 14:41:43,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579509198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:43,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:43,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:41:43,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817961765] [2024-06-04 14:41:43,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:43,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:41:43,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:43,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:41:43,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:41:43,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-04 14:41:43,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 304 transitions, 2815 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-04 14:41:43,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:43,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-04 14:41:43,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:44,798 INFO L124 PetriNetUnfolderBase]: 3488/5320 cut-off events. [2024-06-04 14:41:44,798 INFO L125 PetriNetUnfolderBase]: For 618491/618491 co-relation queries the response was YES. [2024-06-04 14:41:44,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48643 conditions, 5320 events. 3488/5320 cut-off events. For 618491/618491 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 28021 event pairs, 770 based on Foata normal form. 2/5320 useless extension candidates. Maximal degree in co-relation 48542. Up to 5154 conditions per place. [2024-06-04 14:41:44,848 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 298 selfloop transitions, 14 changer transitions 0/320 dead transitions. [2024-06-04 14:41:44,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 320 transitions, 3527 flow [2024-06-04 14:41:44,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:41:44,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:41:44,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-04 14:41:44,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3687707641196013 [2024-06-04 14:41:44,849 INFO L175 Difference]: Start difference. First operand has 231 places, 304 transitions, 2815 flow. Second operand 7 states and 111 transitions. [2024-06-04 14:41:44,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 320 transitions, 3527 flow [2024-06-04 14:41:45,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 320 transitions, 3451 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-04 14:41:45,307 INFO L231 Difference]: Finished difference. Result has 233 places, 307 transitions, 2829 flow [2024-06-04 14:41:45,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2739, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2829, PETRI_PLACES=233, PETRI_TRANSITIONS=307} [2024-06-04 14:41:45,308 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 189 predicate places. [2024-06-04 14:41:45,308 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 307 transitions, 2829 flow [2024-06-04 14:41:45,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-04 14:41:45,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:45,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:45,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 14:41:45,308 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:41:45,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:45,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1030605797, now seen corresponding path program 2 times [2024-06-04 14:41:45,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:45,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638515211] [2024-06-04 14:41:45,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:45,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:45,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:47,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:41:47,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:47,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638515211] [2024-06-04 14:41:47,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638515211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:47,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:47,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:41:47,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957373894] [2024-06-04 14:41:47,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:47,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:41:47,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:47,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:41:47,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:41:47,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-04 14:41:47,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 307 transitions, 2829 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-04 14:41:47,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:47,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-04 14:41:47,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:49,037 INFO L124 PetriNetUnfolderBase]: 3498/5336 cut-off events. [2024-06-04 14:41:49,038 INFO L125 PetriNetUnfolderBase]: For 635534/635534 co-relation queries the response was YES. [2024-06-04 14:41:49,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49227 conditions, 5336 events. 3498/5336 cut-off events. For 635534/635534 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 28069 event pairs, 770 based on Foata normal form. 3/5337 useless extension candidates. Maximal degree in co-relation 49125. Up to 5169 conditions per place. [2024-06-04 14:41:49,086 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 300 selfloop transitions, 16 changer transitions 0/324 dead transitions. [2024-06-04 14:41:49,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 324 transitions, 3565 flow [2024-06-04 14:41:49,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:41:49,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:41:49,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-04 14:41:49,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36212624584717606 [2024-06-04 14:41:49,087 INFO L175 Difference]: Start difference. First operand has 233 places, 307 transitions, 2829 flow. Second operand 7 states and 109 transitions. [2024-06-04 14:41:49,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 324 transitions, 3565 flow [2024-06-04 14:41:49,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 324 transitions, 3497 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-04 14:41:49,505 INFO L231 Difference]: Finished difference. Result has 236 places, 313 transitions, 2890 flow [2024-06-04 14:41:49,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2761, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2890, PETRI_PLACES=236, PETRI_TRANSITIONS=313} [2024-06-04 14:41:49,505 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-04 14:41:49,506 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 313 transitions, 2890 flow [2024-06-04 14:41:49,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-04 14:41:49,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:49,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:49,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 14:41:49,506 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:41:49,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:49,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1535829442, now seen corresponding path program 3 times [2024-06-04 14:41:49,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:49,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986066654] [2024-06-04 14:41:49,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:49,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:51,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:41:51,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:51,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986066654] [2024-06-04 14:41:51,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986066654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:51,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:51,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:41:51,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022221811] [2024-06-04 14:41:51,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:51,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:41:51,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:51,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:41:51,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:41:52,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-04 14:41:52,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 313 transitions, 2890 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-04 14:41:52,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:52,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-04 14:41:52,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:53,264 INFO L124 PetriNetUnfolderBase]: 3505/5346 cut-off events. [2024-06-04 14:41:53,264 INFO L125 PetriNetUnfolderBase]: For 648527/648527 co-relation queries the response was YES. [2024-06-04 14:41:53,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49975 conditions, 5346 events. 3505/5346 cut-off events. For 648527/648527 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 28083 event pairs, 770 based on Foata normal form. 3/5347 useless extension candidates. Maximal degree in co-relation 49871. Up to 5178 conditions per place. [2024-06-04 14:41:53,324 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 306 selfloop transitions, 14 changer transitions 0/328 dead transitions. [2024-06-04 14:41:53,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 328 transitions, 3674 flow [2024-06-04 14:41:53,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:41:53,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:41:53,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-04 14:41:53,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3654485049833887 [2024-06-04 14:41:53,326 INFO L175 Difference]: Start difference. First operand has 236 places, 313 transitions, 2890 flow. Second operand 7 states and 110 transitions. [2024-06-04 14:41:53,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 328 transitions, 3674 flow [2024-06-04 14:41:53,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 328 transitions, 3605 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-04 14:41:53,893 INFO L231 Difference]: Finished difference. Result has 239 places, 316 transitions, 2929 flow [2024-06-04 14:41:53,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2821, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2929, PETRI_PLACES=239, PETRI_TRANSITIONS=316} [2024-06-04 14:41:53,893 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 195 predicate places. [2024-06-04 14:41:53,894 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 316 transitions, 2929 flow [2024-06-04 14:41:53,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-04 14:41:53,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:53,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:53,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 14:41:53,894 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:41:53,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:53,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1030338887, now seen corresponding path program 3 times [2024-06-04 14:41:53,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:53,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359426830] [2024-06-04 14:41:53,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:53,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:56,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:41:56,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:56,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359426830] [2024-06-04 14:41:56,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359426830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:56,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:56,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:41:56,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329666960] [2024-06-04 14:41:56,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:56,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:41:56,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:56,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:41:56,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:41:56,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-04 14:41:56,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 316 transitions, 2929 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-04 14:41:56,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:56,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-04 14:41:56,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:57,558 INFO L124 PetriNetUnfolderBase]: 3504/5345 cut-off events. [2024-06-04 14:41:57,558 INFO L125 PetriNetUnfolderBase]: For 661401/661401 co-relation queries the response was YES. [2024-06-04 14:41:57,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50365 conditions, 5345 events. 3504/5345 cut-off events. For 661401/661401 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 28157 event pairs, 769 based on Foata normal form. 3/5346 useless extension candidates. Maximal degree in co-relation 50260. Up to 5181 conditions per place. [2024-06-04 14:41:57,613 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 308 selfloop transitions, 14 changer transitions 0/330 dead transitions. [2024-06-04 14:41:57,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 330 transitions, 3671 flow [2024-06-04 14:41:57,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:41:57,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:41:57,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-04 14:41:57,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36212624584717606 [2024-06-04 14:41:57,614 INFO L175 Difference]: Start difference. First operand has 239 places, 316 transitions, 2929 flow. Second operand 7 states and 109 transitions. [2024-06-04 14:41:57,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 330 transitions, 3671 flow [2024-06-04 14:41:58,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 330 transitions, 3585 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-04 14:41:58,207 INFO L231 Difference]: Finished difference. Result has 241 places, 319 transitions, 2947 flow [2024-06-04 14:41:58,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2843, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2947, PETRI_PLACES=241, PETRI_TRANSITIONS=319} [2024-06-04 14:41:58,208 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 197 predicate places. [2024-06-04 14:41:58,208 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 319 transitions, 2947 flow [2024-06-04 14:41:58,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2024-06-04 14:41:58,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:58,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:58,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 14:41:58,208 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:41:58,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:58,209 INFO L85 PathProgramCache]: Analyzing trace with hash 534473817, now seen corresponding path program 1 times [2024-06-04 14:41:58,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:58,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173335508] [2024-06-04 14:41:58,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:58,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:02,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:42:02,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:02,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173335508] [2024-06-04 14:42:02,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173335508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:02,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:02,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:42:02,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18656409] [2024-06-04 14:42:02,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:02,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:42:02,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:02,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:42:02,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:42:03,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:42:03,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 319 transitions, 2947 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 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) [2024-06-04 14:42:03,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:03,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:42:03,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:04,918 INFO L124 PetriNetUnfolderBase]: 3680/5517 cut-off events. [2024-06-04 14:42:04,919 INFO L125 PetriNetUnfolderBase]: For 675099/675105 co-relation queries the response was YES. [2024-06-04 14:42:04,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52078 conditions, 5517 events. 3680/5517 cut-off events. For 675099/675105 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 28404 event pairs, 748 based on Foata normal form. 8/5523 useless extension candidates. Maximal degree in co-relation 51972. Up to 5254 conditions per place. [2024-06-04 14:42:04,980 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 313 selfloop transitions, 50 changer transitions 0/366 dead transitions. [2024-06-04 14:42:04,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 366 transitions, 3965 flow [2024-06-04 14:42:04,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:42:04,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:42:04,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-04 14:42:04,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-04 14:42:04,982 INFO L175 Difference]: Start difference. First operand has 241 places, 319 transitions, 2947 flow. Second operand 10 states and 165 transitions. [2024-06-04 14:42:04,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 366 transitions, 3965 flow [2024-06-04 14:42:05,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 366 transitions, 3887 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-04 14:42:05,492 INFO L231 Difference]: Finished difference. Result has 247 places, 325 transitions, 3156 flow [2024-06-04 14:42:05,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2869, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3156, PETRI_PLACES=247, PETRI_TRANSITIONS=325} [2024-06-04 14:42:05,493 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 203 predicate places. [2024-06-04 14:42:05,493 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 325 transitions, 3156 flow [2024-06-04 14:42:05,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 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) [2024-06-04 14:42:05,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:05,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:42:05,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 14:42:05,493 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:42:05,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:05,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1068398981, now seen corresponding path program 1 times [2024-06-04 14:42:05,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:05,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448349671] [2024-06-04 14:42:05,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:05,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:42:08,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:08,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448349671] [2024-06-04 14:42:08,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448349671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:08,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:08,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:42:08,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402570763] [2024-06-04 14:42:08,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:08,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:42:08,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:08,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:42:08,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:42:09,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:42:09,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 325 transitions, 3156 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 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) [2024-06-04 14:42:09,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:09,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:42:09,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:10,909 INFO L124 PetriNetUnfolderBase]: 3772/5669 cut-off events. [2024-06-04 14:42:10,910 INFO L125 PetriNetUnfolderBase]: For 746847/746853 co-relation queries the response was YES. [2024-06-04 14:42:10,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54448 conditions, 5669 events. 3772/5669 cut-off events. For 746847/746853 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 29526 event pairs, 743 based on Foata normal form. 26/5693 useless extension candidates. Maximal degree in co-relation 54340. Up to 5309 conditions per place. [2024-06-04 14:42:10,981 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 328 selfloop transitions, 42 changer transitions 0/373 dead transitions. [2024-06-04 14:42:10,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 373 transitions, 4182 flow [2024-06-04 14:42:10,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:42:10,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:42:10,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-04 14:42:10,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3930232558139535 [2024-06-04 14:42:10,982 INFO L175 Difference]: Start difference. First operand has 247 places, 325 transitions, 3156 flow. Second operand 10 states and 169 transitions. [2024-06-04 14:42:10,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 373 transitions, 4182 flow [2024-06-04 14:42:11,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 373 transitions, 3964 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-04 14:42:11,423 INFO L231 Difference]: Finished difference. Result has 250 places, 328 transitions, 3130 flow [2024-06-04 14:42:11,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2938, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3130, PETRI_PLACES=250, PETRI_TRANSITIONS=328} [2024-06-04 14:42:11,424 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 206 predicate places. [2024-06-04 14:42:11,424 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 328 transitions, 3130 flow [2024-06-04 14:42:11,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 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) [2024-06-04 14:42:11,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:11,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:42:11,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 14:42:11,424 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:42:11,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:11,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1318534293, now seen corresponding path program 1 times [2024-06-04 14:42:11,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:11,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537169283] [2024-06-04 14:42:11,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:11,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:11,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:13,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:42:13,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:13,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537169283] [2024-06-04 14:42:13,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537169283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:13,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:13,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:42:13,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062769562] [2024-06-04 14:42:13,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:13,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:42:13,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:13,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:42:13,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:42:13,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:42:13,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 328 transitions, 3130 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:13,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:13,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:42:13,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:15,512 INFO L124 PetriNetUnfolderBase]: 3782/5683 cut-off events. [2024-06-04 14:42:15,513 INFO L125 PetriNetUnfolderBase]: For 729884/729890 co-relation queries the response was YES. [2024-06-04 14:42:15,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54531 conditions, 5683 events. 3782/5683 cut-off events. For 729884/729890 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 29575 event pairs, 782 based on Foata normal form. 8/5689 useless extension candidates. Maximal degree in co-relation 54422. Up to 5559 conditions per place. [2024-06-04 14:42:15,576 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 324 selfloop transitions, 29 changer transitions 0/356 dead transitions. [2024-06-04 14:42:15,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 356 transitions, 3988 flow [2024-06-04 14:42:15,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:42:15,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:42:15,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-04 14:42:15,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-04 14:42:15,585 INFO L175 Difference]: Start difference. First operand has 250 places, 328 transitions, 3130 flow. Second operand 8 states and 128 transitions. [2024-06-04 14:42:15,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 356 transitions, 3988 flow [2024-06-04 14:42:16,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 356 transitions, 3860 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-04 14:42:16,023 INFO L231 Difference]: Finished difference. Result has 250 places, 331 transitions, 3142 flow [2024-06-04 14:42:16,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3002, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3142, PETRI_PLACES=250, PETRI_TRANSITIONS=331} [2024-06-04 14:42:16,024 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 206 predicate places. [2024-06-04 14:42:16,024 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 331 transitions, 3142 flow [2024-06-04 14:42:16,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:16,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:16,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:42:16,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 14:42:16,024 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:42:16,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:16,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1315019947, now seen corresponding path program 1 times [2024-06-04 14:42:16,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:16,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520656462] [2024-06-04 14:42:16,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:16,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:16,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:17,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:42:17,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:17,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520656462] [2024-06-04 14:42:17,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520656462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:17,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:17,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:42:17,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750301199] [2024-06-04 14:42:17,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:17,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:42:17,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:17,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:42:17,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:42:17,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:42:17,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 331 transitions, 3142 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:17,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:17,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:42:17,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:19,305 INFO L124 PetriNetUnfolderBase]: 3787/5690 cut-off events. [2024-06-04 14:42:19,305 INFO L125 PetriNetUnfolderBase]: For 734257/734263 co-relation queries the response was YES. [2024-06-04 14:42:19,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54673 conditions, 5690 events. 3787/5690 cut-off events. For 734257/734263 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 29603 event pairs, 781 based on Foata normal form. 7/5695 useless extension candidates. Maximal degree in co-relation 54563. Up to 5634 conditions per place. [2024-06-04 14:42:19,371 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 334 selfloop transitions, 17 changer transitions 0/354 dead transitions. [2024-06-04 14:42:19,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 354 transitions, 3998 flow [2024-06-04 14:42:19,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:42:19,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:42:19,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-04 14:42:19,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3687707641196013 [2024-06-04 14:42:19,373 INFO L175 Difference]: Start difference. First operand has 250 places, 331 transitions, 3142 flow. Second operand 7 states and 111 transitions. [2024-06-04 14:42:19,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 354 transitions, 3998 flow [2024-06-04 14:42:19,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 354 transitions, 3880 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-04 14:42:19,921 INFO L231 Difference]: Finished difference. Result has 251 places, 334 transitions, 3158 flow [2024-06-04 14:42:19,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3024, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3158, PETRI_PLACES=251, PETRI_TRANSITIONS=334} [2024-06-04 14:42:19,922 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 207 predicate places. [2024-06-04 14:42:19,922 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 334 transitions, 3158 flow [2024-06-04 14:42:19,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:19,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:19,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:42:19,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 14:42:19,922 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:42:19,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:19,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1158674309, now seen corresponding path program 2 times [2024-06-04 14:42:19,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:19,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820515732] [2024-06-04 14:42:19,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:19,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:19,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:21,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:42:21,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:21,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820515732] [2024-06-04 14:42:21,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820515732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:21,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:21,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:42:21,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817626010] [2024-06-04 14:42:21,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:21,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:42:21,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:21,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:42:21,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:42:21,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:42:21,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 334 transitions, 3158 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:21,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:21,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:42:21,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:23,383 INFO L124 PetriNetUnfolderBase]: 3792/5697 cut-off events. [2024-06-04 14:42:23,383 INFO L125 PetriNetUnfolderBase]: For 752869/752875 co-relation queries the response was YES. [2024-06-04 14:42:23,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55214 conditions, 5697 events. 3792/5697 cut-off events. For 752869/752875 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 29680 event pairs, 781 based on Foata normal form. 7/5702 useless extension candidates. Maximal degree in co-relation 55103. Up to 5650 conditions per place. [2024-06-04 14:42:23,440 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 334 selfloop transitions, 17 changer transitions 0/354 dead transitions. [2024-06-04 14:42:23,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 354 transitions, 4010 flow [2024-06-04 14:42:23,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:42:23,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:42:23,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-04 14:42:23,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588039867109635 [2024-06-04 14:42:23,441 INFO L175 Difference]: Start difference. First operand has 251 places, 334 transitions, 3158 flow. Second operand 7 states and 108 transitions. [2024-06-04 14:42:23,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 354 transitions, 4010 flow [2024-06-04 14:42:23,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 354 transitions, 3898 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-04 14:42:23,964 INFO L231 Difference]: Finished difference. Result has 253 places, 337 transitions, 3186 flow [2024-06-04 14:42:23,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3046, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3186, PETRI_PLACES=253, PETRI_TRANSITIONS=337} [2024-06-04 14:42:23,964 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 209 predicate places. [2024-06-04 14:42:23,964 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 337 transitions, 3186 flow [2024-06-04 14:42:23,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:23,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:23,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:42:23,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 14:42:23,965 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:42:23,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:23,965 INFO L85 PathProgramCache]: Analyzing trace with hash 27277293, now seen corresponding path program 2 times [2024-06-04 14:42:23,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:23,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078202365] [2024-06-04 14:42:23,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:23,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:28,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:42:28,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:28,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078202365] [2024-06-04 14:42:28,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078202365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:28,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:28,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:42:28,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601477252] [2024-06-04 14:42:28,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:28,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:42:28,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:28,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:42:28,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:42:28,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:42:28,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 337 transitions, 3186 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 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) [2024-06-04 14:42:28,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:28,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:42:28,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:30,455 INFO L124 PetriNetUnfolderBase]: 3884/5849 cut-off events. [2024-06-04 14:42:30,455 INFO L125 PetriNetUnfolderBase]: For 828068/828074 co-relation queries the response was YES. [2024-06-04 14:42:30,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57268 conditions, 5849 events. 3884/5849 cut-off events. For 828068/828074 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 30741 event pairs, 764 based on Foata normal form. 26/5873 useless extension candidates. Maximal degree in co-relation 57156. Up to 5388 conditions per place. [2024-06-04 14:42:30,516 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 344 selfloop transitions, 41 changer transitions 0/388 dead transitions. [2024-06-04 14:42:30,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 388 transitions, 4288 flow [2024-06-04 14:42:30,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:42:30,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:42:30,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-04 14:42:30,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.386892177589852 [2024-06-04 14:42:30,518 INFO L175 Difference]: Start difference. First operand has 253 places, 337 transitions, 3186 flow. Second operand 11 states and 183 transitions. [2024-06-04 14:42:30,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 388 transitions, 4288 flow [2024-06-04 14:42:31,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 388 transitions, 4170 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-04 14:42:31,289 INFO L231 Difference]: Finished difference. Result has 259 places, 340 transitions, 3294 flow [2024-06-04 14:42:31,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3068, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3294, PETRI_PLACES=259, PETRI_TRANSITIONS=340} [2024-06-04 14:42:31,290 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 215 predicate places. [2024-06-04 14:42:31,290 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 340 transitions, 3294 flow [2024-06-04 14:42:31,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 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) [2024-06-04 14:42:31,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:31,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:42:31,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 14:42:31,291 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:42:31,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:31,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1942734307, now seen corresponding path program 3 times [2024-06-04 14:42:31,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:31,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6861364] [2024-06-04 14:42:31,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:31,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:31,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:42:35,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:35,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6861364] [2024-06-04 14:42:35,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6861364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:35,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:35,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:42:35,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692964103] [2024-06-04 14:42:35,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:35,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:42:35,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:35,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:42:35,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:42:35,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:42:35,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 340 transitions, 3294 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 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) [2024-06-04 14:42:35,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:35,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:42:35,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:37,724 INFO L124 PetriNetUnfolderBase]: 3976/6002 cut-off events. [2024-06-04 14:42:37,725 INFO L125 PetriNetUnfolderBase]: For 867780/867780 co-relation queries the response was YES. [2024-06-04 14:42:37,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59224 conditions, 6002 events. 3976/6002 cut-off events. For 867780/867780 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 31904 event pairs, 763 based on Foata normal form. 20/6020 useless extension candidates. Maximal degree in co-relation 59111. Up to 5349 conditions per place. [2024-06-04 14:42:37,803 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 305 selfloop transitions, 82 changer transitions 0/390 dead transitions. [2024-06-04 14:42:37,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 390 transitions, 4362 flow [2024-06-04 14:42:37,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:42:37,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:42:37,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-04 14:42:37,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39957716701902746 [2024-06-04 14:42:37,804 INFO L175 Difference]: Start difference. First operand has 259 places, 340 transitions, 3294 flow. Second operand 11 states and 189 transitions. [2024-06-04 14:42:37,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 390 transitions, 4362 flow [2024-06-04 14:42:38,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 390 transitions, 4236 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-04 14:42:38,361 INFO L231 Difference]: Finished difference. Result has 261 places, 343 transitions, 3444 flow [2024-06-04 14:42:38,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3168, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3444, PETRI_PLACES=261, PETRI_TRANSITIONS=343} [2024-06-04 14:42:38,362 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 217 predicate places. [2024-06-04 14:42:38,362 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 343 transitions, 3444 flow [2024-06-04 14:42:38,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 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) [2024-06-04 14:42:38,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:38,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:42:38,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 14:42:38,362 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:42:38,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:38,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1776500527, now seen corresponding path program 4 times [2024-06-04 14:42:38,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:38,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400162441] [2024-06-04 14:42:38,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:38,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:42,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:42:42,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:42,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400162441] [2024-06-04 14:42:42,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400162441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:42,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:42,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:42:42,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362621787] [2024-06-04 14:42:42,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:42,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:42:42,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:42,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:42:42,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:42:42,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:42:42,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 343 transitions, 3444 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 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) [2024-06-04 14:42:42,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:42,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:42:42,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:44,557 INFO L124 PetriNetUnfolderBase]: 4051/6126 cut-off events. [2024-06-04 14:42:44,558 INFO L125 PetriNetUnfolderBase]: For 894048/894054 co-relation queries the response was YES. [2024-06-04 14:42:44,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60695 conditions, 6126 events. 4051/6126 cut-off events. For 894048/894054 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 32862 event pairs, 824 based on Foata normal form. 26/6150 useless extension candidates. Maximal degree in co-relation 60581. Up to 5853 conditions per place. [2024-06-04 14:42:44,632 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 356 selfloop transitions, 32 changer transitions 0/391 dead transitions. [2024-06-04 14:42:44,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 391 transitions, 4512 flow [2024-06-04 14:42:44,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:42:44,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:42:44,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-04 14:42:44,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3784355179704017 [2024-06-04 14:42:44,634 INFO L175 Difference]: Start difference. First operand has 261 places, 343 transitions, 3444 flow. Second operand 11 states and 179 transitions. [2024-06-04 14:42:44,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 391 transitions, 4512 flow [2024-06-04 14:42:45,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 391 transitions, 4300 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-04 14:42:45,420 INFO L231 Difference]: Finished difference. Result has 263 places, 344 transitions, 3395 flow [2024-06-04 14:42:45,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3232, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3395, PETRI_PLACES=263, PETRI_TRANSITIONS=344} [2024-06-04 14:42:45,420 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 219 predicate places. [2024-06-04 14:42:45,420 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 344 transitions, 3395 flow [2024-06-04 14:42:45,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 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) [2024-06-04 14:42:45,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:45,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:42:45,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 14:42:45,421 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:42:45,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:45,421 INFO L85 PathProgramCache]: Analyzing trace with hash 27516303, now seen corresponding path program 5 times [2024-06-04 14:42:45,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:45,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137365944] [2024-06-04 14:42:45,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:45,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:48,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:42:48,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:48,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137365944] [2024-06-04 14:42:48,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137365944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:48,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:48,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:42:48,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191205571] [2024-06-04 14:42:48,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:48,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:42:48,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:48,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:42:48,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:42:48,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:42:48,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 344 transitions, 3395 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-04 14:42:48,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:48,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:42:48,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:50,406 INFO L124 PetriNetUnfolderBase]: 4187/6354 cut-off events. [2024-06-04 14:42:50,406 INFO L125 PetriNetUnfolderBase]: For 943853/943859 co-relation queries the response was YES. [2024-06-04 14:42:50,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63521 conditions, 6354 events. 4187/6354 cut-off events. For 943853/943859 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 34420 event pairs, 841 based on Foata normal form. 22/6374 useless extension candidates. Maximal degree in co-relation 63406. Up to 5540 conditions per place. [2024-06-04 14:42:50,487 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 350 selfloop transitions, 43 changer transitions 0/396 dead transitions. [2024-06-04 14:42:50,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 396 transitions, 4911 flow [2024-06-04 14:42:50,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:42:50,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:42:50,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-04 14:42:50,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39767441860465114 [2024-06-04 14:42:50,488 INFO L175 Difference]: Start difference. First operand has 263 places, 344 transitions, 3395 flow. Second operand 10 states and 171 transitions. [2024-06-04 14:42:50,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 396 transitions, 4911 flow [2024-06-04 14:42:51,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 396 transitions, 4788 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-04 14:42:51,336 INFO L231 Difference]: Finished difference. Result has 265 places, 347 transitions, 3600 flow [2024-06-04 14:42:51,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3272, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3600, PETRI_PLACES=265, PETRI_TRANSITIONS=347} [2024-06-04 14:42:51,337 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 221 predicate places. [2024-06-04 14:42:51,337 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 347 transitions, 3600 flow [2024-06-04 14:42:51,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-04 14:42:51,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:51,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:42:51,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 14:42:51,337 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:42:51,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:51,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1308345213, now seen corresponding path program 2 times [2024-06-04 14:42:51,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:51,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601264496] [2024-06-04 14:42:51,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:51,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:51,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:42:54,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:54,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601264496] [2024-06-04 14:42:54,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601264496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:54,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:54,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:42:54,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059548284] [2024-06-04 14:42:54,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:54,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:42:54,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:54,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:42:54,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:42:54,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:42:54,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 347 transitions, 3600 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:54,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:54,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:42:54,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:55,808 INFO L124 PetriNetUnfolderBase]: 4213/6391 cut-off events. [2024-06-04 14:42:55,808 INFO L125 PetriNetUnfolderBase]: For 928552/928552 co-relation queries the response was YES. [2024-06-04 14:42:55,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63996 conditions, 6391 events. 4213/6391 cut-off events. For 928552/928552 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 34777 event pairs, 907 based on Foata normal form. 2/6391 useless extension candidates. Maximal degree in co-relation 63879. Up to 6235 conditions per place. [2024-06-04 14:42:55,882 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 329 selfloop transitions, 41 changer transitions 0/373 dead transitions. [2024-06-04 14:42:55,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 373 transitions, 4710 flow [2024-06-04 14:42:55,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:42:55,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:42:55,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-04 14:42:55,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-04 14:42:55,883 INFO L175 Difference]: Start difference. First operand has 265 places, 347 transitions, 3600 flow. Second operand 8 states and 127 transitions. [2024-06-04 14:42:55,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 373 transitions, 4710 flow [2024-06-04 14:42:56,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 373 transitions, 4602 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-04 14:42:56,515 INFO L231 Difference]: Finished difference. Result has 267 places, 353 transitions, 3738 flow [2024-06-04 14:42:56,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3492, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3738, PETRI_PLACES=267, PETRI_TRANSITIONS=353} [2024-06-04 14:42:56,516 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 223 predicate places. [2024-06-04 14:42:56,516 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 353 transitions, 3738 flow [2024-06-04 14:42:56,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:56,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:56,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:42:56,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 14:42:56,516 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:42:56,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:56,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1158665381, now seen corresponding path program 1 times [2024-06-04 14:42:56,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:56,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075114527] [2024-06-04 14:42:56,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:56,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:56,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:42:59,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:59,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075114527] [2024-06-04 14:42:59,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075114527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:59,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:59,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:42:59,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322333695] [2024-06-04 14:42:59,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:59,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:42:59,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:59,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:42:59,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:42:59,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:42:59,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 353 transitions, 3738 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:59,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:59,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:42:59,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:00,940 INFO L124 PetriNetUnfolderBase]: 4218/6397 cut-off events. [2024-06-04 14:43:00,940 INFO L125 PetriNetUnfolderBase]: For 935802/935808 co-relation queries the response was YES. [2024-06-04 14:43:00,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64350 conditions, 6397 events. 4218/6397 cut-off events. For 935802/935808 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 34754 event pairs, 905 based on Foata normal form. 7/6402 useless extension candidates. Maximal degree in co-relation 64231. Up to 6347 conditions per place. [2024-06-04 14:43:01,008 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 351 selfloop transitions, 20 changer transitions 0/374 dead transitions. [2024-06-04 14:43:01,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 374 transitions, 4614 flow [2024-06-04 14:43:01,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:43:01,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:43:01,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-04 14:43:01,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34593023255813954 [2024-06-04 14:43:01,009 INFO L175 Difference]: Start difference. First operand has 267 places, 353 transitions, 3738 flow. Second operand 8 states and 119 transitions. [2024-06-04 14:43:01,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 374 transitions, 4614 flow [2024-06-04 14:43:01,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 374 transitions, 4502 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-04 14:43:01,587 INFO L231 Difference]: Finished difference. Result has 271 places, 356 transitions, 3754 flow [2024-06-04 14:43:01,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3626, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3754, PETRI_PLACES=271, PETRI_TRANSITIONS=356} [2024-06-04 14:43:01,588 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 227 predicate places. [2024-06-04 14:43:01,588 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 356 transitions, 3754 flow [2024-06-04 14:43:01,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:01,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:01,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:01,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 14:43:01,588 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:43:01,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:01,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1308357303, now seen corresponding path program 3 times [2024-06-04 14:43:01,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:01,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941239645] [2024-06-04 14:43:01,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:01,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:01,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:04,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:43:04,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:04,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941239645] [2024-06-04 14:43:04,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941239645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:04,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:04,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:43:04,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210183052] [2024-06-04 14:43:04,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:04,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:43:04,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:04,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:43:04,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:43:04,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:43:04,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 356 transitions, 3754 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:04,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:04,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:43:04,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:06,104 INFO L124 PetriNetUnfolderBase]: 4212/6390 cut-off events. [2024-06-04 14:43:06,104 INFO L125 PetriNetUnfolderBase]: For 940142/940142 co-relation queries the response was YES. [2024-06-04 14:43:06,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64634 conditions, 6390 events. 4212/6390 cut-off events. For 940142/940142 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 34669 event pairs, 906 based on Foata normal form. 2/6390 useless extension candidates. Maximal degree in co-relation 64513. Up to 6254 conditions per place. [2024-06-04 14:43:06,187 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 339 selfloop transitions, 33 changer transitions 0/375 dead transitions. [2024-06-04 14:43:06,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 375 transitions, 4556 flow [2024-06-04 14:43:06,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:43:06,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:43:06,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-04 14:43:06,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3633720930232558 [2024-06-04 14:43:06,189 INFO L175 Difference]: Start difference. First operand has 271 places, 356 transitions, 3754 flow. Second operand 8 states and 125 transitions. [2024-06-04 14:43:06,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 375 transitions, 4556 flow [2024-06-04 14:43:07,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 375 transitions, 4396 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-04 14:43:07,083 INFO L231 Difference]: Finished difference. Result has 273 places, 356 transitions, 3666 flow [2024-06-04 14:43:07,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3594, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3666, PETRI_PLACES=273, PETRI_TRANSITIONS=356} [2024-06-04 14:43:07,084 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 229 predicate places. [2024-06-04 14:43:07,084 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 356 transitions, 3666 flow [2024-06-04 14:43:07,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:07,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:07,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:07,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 14:43:07,084 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:43:07,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:07,085 INFO L85 PathProgramCache]: Analyzing trace with hash -118910123, now seen corresponding path program 3 times [2024-06-04 14:43:07,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:07,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100703085] [2024-06-04 14:43:07,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:07,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:09,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:43:09,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:09,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100703085] [2024-06-04 14:43:09,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100703085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:09,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:09,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:43:09,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376691662] [2024-06-04 14:43:09,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:09,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:43:09,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:09,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:43:09,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:43:09,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:43:09,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 356 transitions, 3666 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:09,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:09,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:43:09,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:10,699 INFO L124 PetriNetUnfolderBase]: 4217/6397 cut-off events. [2024-06-04 14:43:10,699 INFO L125 PetriNetUnfolderBase]: For 956736/956752 co-relation queries the response was YES. [2024-06-04 14:43:10,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64914 conditions, 6397 events. 4217/6397 cut-off events. For 956736/956752 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 34694 event pairs, 907 based on Foata normal form. 15/6408 useless extension candidates. Maximal degree in co-relation 64792. Up to 6322 conditions per place. [2024-06-04 14:43:10,775 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 352 selfloop transitions, 22 changer transitions 0/377 dead transitions. [2024-06-04 14:43:10,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 377 transitions, 4576 flow [2024-06-04 14:43:10,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:43:10,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:43:10,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-04 14:43:10,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3654485049833887 [2024-06-04 14:43:10,776 INFO L175 Difference]: Start difference. First operand has 273 places, 356 transitions, 3666 flow. Second operand 7 states and 110 transitions. [2024-06-04 14:43:10,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 377 transitions, 4576 flow [2024-06-04 14:43:11,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 377 transitions, 4490 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-04 14:43:11,626 INFO L231 Difference]: Finished difference. Result has 273 places, 359 transitions, 3738 flow [2024-06-04 14:43:11,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3580, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3738, PETRI_PLACES=273, PETRI_TRANSITIONS=359} [2024-06-04 14:43:11,627 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 229 predicate places. [2024-06-04 14:43:11,627 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 359 transitions, 3738 flow [2024-06-04 14:43:11,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:11,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:11,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:11,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 14:43:11,628 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:43:11,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:11,628 INFO L85 PathProgramCache]: Analyzing trace with hash -106529963, now seen corresponding path program 4 times [2024-06-04 14:43:11,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:11,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005057367] [2024-06-04 14:43:11,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:11,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:11,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:13,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:43:13,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:13,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005057367] [2024-06-04 14:43:13,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005057367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:13,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:13,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:43:13,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381211560] [2024-06-04 14:43:13,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:13,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:43:13,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:13,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:43:13,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:43:13,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:43:13,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 359 transitions, 3738 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:13,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:13,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:43:13,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:15,358 INFO L124 PetriNetUnfolderBase]: 4222/6404 cut-off events. [2024-06-04 14:43:15,358 INFO L125 PetriNetUnfolderBase]: For 978521/978537 co-relation queries the response was YES. [2024-06-04 14:43:15,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65555 conditions, 6404 events. 4222/6404 cut-off events. For 978521/978537 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 34755 event pairs, 907 based on Foata normal form. 15/6415 useless extension candidates. Maximal degree in co-relation 65432. Up to 6320 conditions per place. [2024-06-04 14:43:15,426 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 344 selfloop transitions, 30 changer transitions 0/377 dead transitions. [2024-06-04 14:43:15,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 377 transitions, 4644 flow [2024-06-04 14:43:15,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:43:15,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:43:15,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-04 14:43:15,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588039867109635 [2024-06-04 14:43:15,427 INFO L175 Difference]: Start difference. First operand has 273 places, 359 transitions, 3738 flow. Second operand 7 states and 108 transitions. [2024-06-04 14:43:15,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 377 transitions, 4644 flow [2024-06-04 14:43:16,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 377 transitions, 4508 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-04 14:43:16,313 INFO L231 Difference]: Finished difference. Result has 275 places, 362 transitions, 3782 flow [2024-06-04 14:43:16,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3602, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3782, PETRI_PLACES=275, PETRI_TRANSITIONS=362} [2024-06-04 14:43:16,314 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-04 14:43:16,314 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 362 transitions, 3782 flow [2024-06-04 14:43:16,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:16,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:16,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:16,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 14:43:16,315 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:43:16,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:16,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1999045461, now seen corresponding path program 5 times [2024-06-04 14:43:16,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:16,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175539906] [2024-06-04 14:43:16,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:16,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:18,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:43:18,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:18,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175539906] [2024-06-04 14:43:18,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175539906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:18,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:18,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:43:18,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992350834] [2024-06-04 14:43:18,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:18,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:43:18,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:18,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:43:18,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:43:18,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:43:18,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 362 transitions, 3782 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:18,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:18,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:43:18,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:19,978 INFO L124 PetriNetUnfolderBase]: 4227/6411 cut-off events. [2024-06-04 14:43:19,978 INFO L125 PetriNetUnfolderBase]: For 1000445/1000461 co-relation queries the response was YES. [2024-06-04 14:43:20,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66186 conditions, 6411 events. 4227/6411 cut-off events. For 1000445/1000461 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 34780 event pairs, 902 based on Foata normal form. 15/6422 useless extension candidates. Maximal degree in co-relation 66062. Up to 6357 conditions per place. [2024-06-04 14:43:20,057 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 352 selfloop transitions, 22 changer transitions 0/377 dead transitions. [2024-06-04 14:43:20,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 377 transitions, 4684 flow [2024-06-04 14:43:20,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:43:20,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:43:20,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-04 14:43:20,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34551495016611294 [2024-06-04 14:43:20,059 INFO L175 Difference]: Start difference. First operand has 275 places, 362 transitions, 3782 flow. Second operand 7 states and 104 transitions. [2024-06-04 14:43:20,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 377 transitions, 4684 flow [2024-06-04 14:43:21,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 377 transitions, 4526 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-04 14:43:21,026 INFO L231 Difference]: Finished difference. Result has 277 places, 365 transitions, 3794 flow [2024-06-04 14:43:21,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3624, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3794, PETRI_PLACES=277, PETRI_TRANSITIONS=365} [2024-06-04 14:43:21,027 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 233 predicate places. [2024-06-04 14:43:21,027 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 365 transitions, 3794 flow [2024-06-04 14:43:21,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:21,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:21,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:21,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 14:43:21,027 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:43:21,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:21,027 INFO L85 PathProgramCache]: Analyzing trace with hash 2004759381, now seen corresponding path program 6 times [2024-06-04 14:43:21,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:21,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605482751] [2024-06-04 14:43:21,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:21,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:23,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:43:23,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:23,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605482751] [2024-06-04 14:43:23,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605482751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:23,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:23,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:43:23,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055137082] [2024-06-04 14:43:23,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:23,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:43:23,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:23,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:43:23,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:43:23,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:43:23,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 365 transitions, 3794 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:23,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:23,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:43:23,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:24,674 INFO L124 PetriNetUnfolderBase]: 4224/6407 cut-off events. [2024-06-04 14:43:24,674 INFO L125 PetriNetUnfolderBase]: For 1017288/1017304 co-relation queries the response was YES. [2024-06-04 14:43:24,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66495 conditions, 6407 events. 4224/6407 cut-off events. For 1017288/1017304 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 34764 event pairs, 909 based on Foata normal form. 15/6418 useless extension candidates. Maximal degree in co-relation 66370. Up to 6344 conditions per place. [2024-06-04 14:43:24,757 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 347 selfloop transitions, 30 changer transitions 0/380 dead transitions. [2024-06-04 14:43:24,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 380 transitions, 4708 flow [2024-06-04 14:43:24,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:43:24,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:43:24,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-04 14:43:24,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3488372093023256 [2024-06-04 14:43:24,758 INFO L175 Difference]: Start difference. First operand has 277 places, 365 transitions, 3794 flow. Second operand 7 states and 105 transitions. [2024-06-04 14:43:24,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 380 transitions, 4708 flow [2024-06-04 14:43:25,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 380 transitions, 4560 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-04 14:43:25,611 INFO L231 Difference]: Finished difference. Result has 279 places, 368 transitions, 3838 flow [2024-06-04 14:43:25,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3646, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3838, PETRI_PLACES=279, PETRI_TRANSITIONS=368} [2024-06-04 14:43:25,612 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 235 predicate places. [2024-06-04 14:43:25,612 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 368 transitions, 3838 flow [2024-06-04 14:43:25,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:25,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:25,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:25,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 14:43:25,612 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:43:25,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:25,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1604966683, now seen corresponding path program 6 times [2024-06-04 14:43:25,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:25,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642138086] [2024-06-04 14:43:25,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:25,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:25,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:28,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:43:28,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:28,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642138086] [2024-06-04 14:43:28,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642138086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:28,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:28,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:43:28,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189982983] [2024-06-04 14:43:28,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:28,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:43:28,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:28,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:43:28,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:43:28,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:43:28,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 368 transitions, 3838 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-04 14:43:28,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:28,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:43:28,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:30,979 INFO L124 PetriNetUnfolderBase]: 4410/6713 cut-off events. [2024-06-04 14:43:30,979 INFO L125 PetriNetUnfolderBase]: For 1164588/1164604 co-relation queries the response was YES. [2024-06-04 14:43:31,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71895 conditions, 6713 events. 4410/6713 cut-off events. For 1164588/1164604 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 36978 event pairs, 917 based on Foata normal form. 30/6739 useless extension candidates. Maximal degree in co-relation 71769. Up to 6047 conditions per place. [2024-06-04 14:43:31,056 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 370 selfloop transitions, 45 changer transitions 0/418 dead transitions. [2024-06-04 14:43:31,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 418 transitions, 5414 flow [2024-06-04 14:43:31,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:43:31,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:43:31,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-04 14:43:31,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-04 14:43:31,058 INFO L175 Difference]: Start difference. First operand has 279 places, 368 transitions, 3838 flow. Second operand 10 states and 170 transitions. [2024-06-04 14:43:31,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 418 transitions, 5414 flow [2024-06-04 14:43:31,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 418 transitions, 5244 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-04 14:43:31,853 INFO L231 Difference]: Finished difference. Result has 285 places, 371 transitions, 3999 flow [2024-06-04 14:43:31,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3668, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3999, PETRI_PLACES=285, PETRI_TRANSITIONS=371} [2024-06-04 14:43:31,854 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 241 predicate places. [2024-06-04 14:43:31,854 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 371 transitions, 3999 flow [2024-06-04 14:43:31,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-04 14:43:31,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:31,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:31,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 14:43:31,855 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:43:31,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:31,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1605205693, now seen corresponding path program 7 times [2024-06-04 14:43:31,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:31,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909793490] [2024-06-04 14:43:31,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:31,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:31,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:35,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:43:35,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:35,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909793490] [2024-06-04 14:43:35,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909793490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:35,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:35,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:43:35,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530876105] [2024-06-04 14:43:35,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:35,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:43:35,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:35,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:43:35,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:43:35,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:43:35,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 371 transitions, 3999 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 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) [2024-06-04 14:43:35,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:35,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:43:35,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:38,053 INFO L124 PetriNetUnfolderBase]: 4502/6865 cut-off events. [2024-06-04 14:43:38,053 INFO L125 PetriNetUnfolderBase]: For 1223857/1223873 co-relation queries the response was YES. [2024-06-04 14:43:38,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74082 conditions, 6865 events. 4502/6865 cut-off events. For 1223857/1223873 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 38172 event pairs, 954 based on Foata normal form. 34/6895 useless extension candidates. Maximal degree in co-relation 73954. Up to 6385 conditions per place. [2024-06-04 14:43:38,131 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 371 selfloop transitions, 46 changer transitions 0/420 dead transitions. [2024-06-04 14:43:38,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 420 transitions, 5175 flow [2024-06-04 14:43:38,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:43:38,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:43:38,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-04 14:43:38,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38477801268498946 [2024-06-04 14:43:38,133 INFO L175 Difference]: Start difference. First operand has 285 places, 371 transitions, 3999 flow. Second operand 11 states and 182 transitions. [2024-06-04 14:43:38,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 420 transitions, 5175 flow [2024-06-04 14:43:39,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 420 transitions, 5055 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-04 14:43:39,226 INFO L231 Difference]: Finished difference. Result has 290 places, 374 transitions, 4129 flow [2024-06-04 14:43:39,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3881, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4129, PETRI_PLACES=290, PETRI_TRANSITIONS=374} [2024-06-04 14:43:39,226 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 246 predicate places. [2024-06-04 14:43:39,227 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 374 transitions, 4129 flow [2024-06-04 14:43:39,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 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) [2024-06-04 14:43:39,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:39,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:39,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 14:43:39,227 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:43:39,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:39,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1635293629, now seen corresponding path program 8 times [2024-06-04 14:43:39,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:39,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316349613] [2024-06-04 14:43:39,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:39,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:39,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:42,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:43:42,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:42,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316349613] [2024-06-04 14:43:42,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316349613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:42,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:42,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:43:42,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968279741] [2024-06-04 14:43:42,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:42,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:43:42,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:42,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:43:42,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:43:42,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:43:42,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 374 transitions, 4129 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-04 14:43:42,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:42,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:43:42,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:44,549 INFO L124 PetriNetUnfolderBase]: 4763/7296 cut-off events. [2024-06-04 14:43:44,549 INFO L125 PetriNetUnfolderBase]: For 1320635/1320651 co-relation queries the response was YES. [2024-06-04 14:43:44,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79974 conditions, 7296 events. 4763/7296 cut-off events. For 1320635/1320651 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 41558 event pairs, 992 based on Foata normal form. 30/7322 useless extension candidates. Maximal degree in co-relation 79844. Up to 6221 conditions per place. [2024-06-04 14:43:44,644 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 322 selfloop transitions, 100 changer transitions 0/425 dead transitions. [2024-06-04 14:43:44,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 425 transitions, 5737 flow [2024-06-04 14:43:44,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:43:44,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:43:44,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-04 14:43:44,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116279069767442 [2024-06-04 14:43:44,646 INFO L175 Difference]: Start difference. First operand has 290 places, 374 transitions, 4129 flow. Second operand 10 states and 177 transitions. [2024-06-04 14:43:44,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 425 transitions, 5737 flow [2024-06-04 14:43:45,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 425 transitions, 5595 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-04 14:43:45,914 INFO L231 Difference]: Finished difference. Result has 292 places, 377 transitions, 4434 flow [2024-06-04 14:43:45,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3987, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4434, PETRI_PLACES=292, PETRI_TRANSITIONS=377} [2024-06-04 14:43:45,914 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 248 predicate places. [2024-06-04 14:43:45,914 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 377 transitions, 4434 flow [2024-06-04 14:43:45,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-04 14:43:45,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:45,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:45,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 14:43:45,915 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:43:45,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:45,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1777695583, now seen corresponding path program 9 times [2024-06-04 14:43:45,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:45,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131313077] [2024-06-04 14:43:45,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:45,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:49,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:43:49,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:49,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131313077] [2024-06-04 14:43:49,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131313077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:49,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:49,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:43:49,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429146765] [2024-06-04 14:43:49,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:49,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:43:49,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:49,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:43:49,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:43:49,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:43:49,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 377 transitions, 4434 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 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) [2024-06-04 14:43:49,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:49,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:43:49,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:52,123 INFO L124 PetriNetUnfolderBase]: 4838/7424 cut-off events. [2024-06-04 14:43:52,123 INFO L125 PetriNetUnfolderBase]: For 1368780/1368790 co-relation queries the response was YES. [2024-06-04 14:43:52,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81694 conditions, 7424 events. 4838/7424 cut-off events. For 1368780/1368790 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 42545 event pairs, 1042 based on Foata normal form. 25/7444 useless extension candidates. Maximal degree in co-relation 81562. Up to 7006 conditions per place. [2024-06-04 14:43:52,224 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 367 selfloop transitions, 53 changer transitions 0/423 dead transitions. [2024-06-04 14:43:52,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 423 transitions, 5566 flow [2024-06-04 14:43:52,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:43:52,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:43:52,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-04 14:43:52,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38266384778012685 [2024-06-04 14:43:52,226 INFO L175 Difference]: Start difference. First operand has 292 places, 377 transitions, 4434 flow. Second operand 11 states and 181 transitions. [2024-06-04 14:43:52,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 423 transitions, 5566 flow [2024-06-04 14:43:54,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 423 transitions, 5385 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-04 14:43:54,006 INFO L231 Difference]: Finished difference. Result has 297 places, 378 transitions, 4466 flow [2024-06-04 14:43:54,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4253, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4466, PETRI_PLACES=297, PETRI_TRANSITIONS=378} [2024-06-04 14:43:54,007 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-04 14:43:54,007 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 378 transitions, 4466 flow [2024-06-04 14:43:54,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 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) [2024-06-04 14:43:54,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:54,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:43:54,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 14:43:54,007 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:43:54,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:54,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1611461803, now seen corresponding path program 10 times [2024-06-04 14:43:54,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:54,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439291246] [2024-06-04 14:43:54,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:54,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:57,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:43:57,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:57,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439291246] [2024-06-04 14:43:57,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439291246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:57,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:57,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:43:57,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023261283] [2024-06-04 14:43:57,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:57,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:43:57,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:57,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:43:57,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:43:57,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:43:57,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 378 transitions, 4466 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 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) [2024-06-04 14:43:57,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:57,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:43:57,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:00,088 INFO L124 PetriNetUnfolderBase]: 4863/7468 cut-off events. [2024-06-04 14:44:00,088 INFO L125 PetriNetUnfolderBase]: For 1366841/1366857 co-relation queries the response was YES. [2024-06-04 14:44:00,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81566 conditions, 7468 events. 4863/7468 cut-off events. For 1366841/1366857 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 42963 event pairs, 1083 based on Foata normal form. 34/7498 useless extension candidates. Maximal degree in co-relation 81432. Up to 7158 conditions per place. [2024-06-04 14:44:00,180 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 383 selfloop transitions, 39 changer transitions 0/425 dead transitions. [2024-06-04 14:44:00,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 425 transitions, 5617 flow [2024-06-04 14:44:00,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:44:00,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:44:00,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-04 14:44:00,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3784355179704017 [2024-06-04 14:44:00,182 INFO L175 Difference]: Start difference. First operand has 297 places, 378 transitions, 4466 flow. Second operand 11 states and 179 transitions. [2024-06-04 14:44:00,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 425 transitions, 5617 flow [2024-06-04 14:44:01,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 425 transitions, 5448 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-04 14:44:01,372 INFO L231 Difference]: Finished difference. Result has 299 places, 380 transitions, 4498 flow [2024-06-04 14:44:01,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4297, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4498, PETRI_PLACES=299, PETRI_TRANSITIONS=380} [2024-06-04 14:44:01,372 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 255 predicate places. [2024-06-04 14:44:01,373 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 380 transitions, 4498 flow [2024-06-04 14:44:01,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 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) [2024-06-04 14:44:01,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:01,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:44:01,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 14:44:01,373 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:44:01,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:01,374 INFO L85 PathProgramCache]: Analyzing trace with hash 105692611, now seen corresponding path program 11 times [2024-06-04 14:44:01,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:01,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626694161] [2024-06-04 14:44:01,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:01,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:01,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:05,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:44:05,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:05,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626694161] [2024-06-04 14:44:05,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626694161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:05,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:05,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:44:05,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945144867] [2024-06-04 14:44:05,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:05,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:44:05,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:05,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:44:05,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:44:05,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:44:05,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 380 transitions, 4498 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 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) [2024-06-04 14:44:05,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:05,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:44:05,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:08,122 INFO L124 PetriNetUnfolderBase]: 4938/7593 cut-off events. [2024-06-04 14:44:08,122 INFO L125 PetriNetUnfolderBase]: For 1395789/1395805 co-relation queries the response was YES. [2024-06-04 14:44:08,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82731 conditions, 7593 events. 4938/7593 cut-off events. For 1395789/1395805 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 43987 event pairs, 1078 based on Foata normal form. 34/7623 useless extension candidates. Maximal degree in co-relation 82596. Up to 7102 conditions per place. [2024-06-04 14:44:08,219 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 355 selfloop transitions, 69 changer transitions 0/427 dead transitions. [2024-06-04 14:44:08,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 427 transitions, 5643 flow [2024-06-04 14:44:08,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:44:08,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:44:08,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-04 14:44:08,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38477801268498946 [2024-06-04 14:44:08,220 INFO L175 Difference]: Start difference. First operand has 299 places, 380 transitions, 4498 flow. Second operand 11 states and 182 transitions. [2024-06-04 14:44:08,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 427 transitions, 5643 flow [2024-06-04 14:44:09,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 427 transitions, 5479 flow, removed 36 selfloop flow, removed 10 redundant places. [2024-06-04 14:44:09,933 INFO L231 Difference]: Finished difference. Result has 300 places, 381 transitions, 4576 flow [2024-06-04 14:44:09,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4334, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4576, PETRI_PLACES=300, PETRI_TRANSITIONS=381} [2024-06-04 14:44:09,933 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 256 predicate places. [2024-06-04 14:44:09,933 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 381 transitions, 4576 flow [2024-06-04 14:44:09,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 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) [2024-06-04 14:44:09,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:09,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:44:09,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 14:44:09,934 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:44:09,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:09,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1635532639, now seen corresponding path program 12 times [2024-06-04 14:44:09,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:09,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355514080] [2024-06-04 14:44:09,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:09,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:13,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:44:13,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:13,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355514080] [2024-06-04 14:44:13,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355514080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:13,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:13,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:44:13,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482046969] [2024-06-04 14:44:13,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:13,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:44:13,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:13,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:44:13,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:44:13,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:44:13,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 381 transitions, 4576 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 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) [2024-06-04 14:44:13,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:13,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:44:13,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:16,575 INFO L124 PetriNetUnfolderBase]: 4980/7667 cut-off events. [2024-06-04 14:44:16,576 INFO L125 PetriNetUnfolderBase]: For 1395192/1395208 co-relation queries the response was YES. [2024-06-04 14:44:16,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82667 conditions, 7667 events. 4980/7667 cut-off events. For 1395192/1395208 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 44668 event pairs, 1055 based on Foata normal form. 34/7697 useless extension candidates. Maximal degree in co-relation 82532. Up to 6778 conditions per place. [2024-06-04 14:44:16,671 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 327 selfloop transitions, 101 changer transitions 0/431 dead transitions. [2024-06-04 14:44:16,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 431 transitions, 5780 flow [2024-06-04 14:44:16,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:44:16,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:44:16,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-04 14:44:16,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39957716701902746 [2024-06-04 14:44:16,673 INFO L175 Difference]: Start difference. First operand has 300 places, 381 transitions, 4576 flow. Second operand 11 states and 189 transitions. [2024-06-04 14:44:16,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 431 transitions, 5780 flow [2024-06-04 14:44:18,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 431 transitions, 5597 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-04 14:44:18,362 INFO L231 Difference]: Finished difference. Result has 303 places, 384 transitions, 4755 flow [2024-06-04 14:44:18,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4393, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4755, PETRI_PLACES=303, PETRI_TRANSITIONS=384} [2024-06-04 14:44:18,362 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 259 predicate places. [2024-06-04 14:44:18,363 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 384 transitions, 4755 flow [2024-06-04 14:44:18,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 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) [2024-06-04 14:44:18,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:18,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:44:18,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 14:44:18,363 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:44:18,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:18,364 INFO L85 PathProgramCache]: Analyzing trace with hash 2021015875, now seen corresponding path program 13 times [2024-06-04 14:44:18,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:18,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487631571] [2024-06-04 14:44:18,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:18,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:18,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:22,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:44:22,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:22,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487631571] [2024-06-04 14:44:22,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487631571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:22,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:22,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:44:22,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496568971] [2024-06-04 14:44:22,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:22,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:44:22,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:22,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:44:22,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:44:22,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:44:22,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 384 transitions, 4755 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 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) [2024-06-04 14:44:22,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:22,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:44:22,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:25,220 INFO L124 PetriNetUnfolderBase]: 5072/7819 cut-off events. [2024-06-04 14:44:25,220 INFO L125 PetriNetUnfolderBase]: For 1429600/1429616 co-relation queries the response was YES. [2024-06-04 14:44:25,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84392 conditions, 7819 events. 5072/7819 cut-off events. For 1429600/1429616 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 45890 event pairs, 1095 based on Foata normal form. 34/7849 useless extension candidates. Maximal degree in co-relation 84256. Up to 7310 conditions per place. [2024-06-04 14:44:25,328 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 356 selfloop transitions, 74 changer transitions 0/433 dead transitions. [2024-06-04 14:44:25,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 433 transitions, 5963 flow [2024-06-04 14:44:25,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:44:25,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:44:25,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-04 14:44:25,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38477801268498946 [2024-06-04 14:44:25,329 INFO L175 Difference]: Start difference. First operand has 303 places, 384 transitions, 4755 flow. Second operand 11 states and 182 transitions. [2024-06-04 14:44:25,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 433 transitions, 5963 flow [2024-06-04 14:44:26,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 433 transitions, 5709 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-04 14:44:26,965 INFO L231 Difference]: Finished difference. Result has 305 places, 387 transitions, 4811 flow [2024-06-04 14:44:26,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4501, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4811, PETRI_PLACES=305, PETRI_TRANSITIONS=387} [2024-06-04 14:44:26,965 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 261 predicate places. [2024-06-04 14:44:26,965 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 387 transitions, 4811 flow [2024-06-04 14:44:26,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 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) [2024-06-04 14:44:26,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:26,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:44:26,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 14:44:26,966 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:44:26,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:26,966 INFO L85 PathProgramCache]: Analyzing trace with hash 2021254885, now seen corresponding path program 14 times [2024-06-04 14:44:26,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:26,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059281558] [2024-06-04 14:44:26,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:26,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:26,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:29,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:44:29,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:29,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059281558] [2024-06-04 14:44:29,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059281558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:29,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:29,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:44:29,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709879347] [2024-06-04 14:44:29,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:29,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:44:29,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:29,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:44:29,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:44:30,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:44:30,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 387 transitions, 4811 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-04 14:44:30,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:30,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:44:30,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:32,568 INFO L124 PetriNetUnfolderBase]: 5191/8020 cut-off events. [2024-06-04 14:44:32,568 INFO L125 PetriNetUnfolderBase]: For 1497740/1497756 co-relation queries the response was YES. [2024-06-04 14:44:32,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87533 conditions, 8020 events. 5191/8020 cut-off events. For 1497740/1497756 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 47459 event pairs, 1089 based on Foata normal form. 30/8046 useless extension candidates. Maximal degree in co-relation 87396. Up to 6926 conditions per place. [2024-06-04 14:44:32,664 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 328 selfloop transitions, 106 changer transitions 0/437 dead transitions. [2024-06-04 14:44:32,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 437 transitions, 6473 flow [2024-06-04 14:44:32,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:44:32,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:44:32,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-04 14:44:32,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-04 14:44:32,665 INFO L175 Difference]: Start difference. First operand has 305 places, 387 transitions, 4811 flow. Second operand 10 states and 175 transitions. [2024-06-04 14:44:32,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 437 transitions, 6473 flow [2024-06-04 14:44:34,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 437 transitions, 6261 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-04 14:44:34,390 INFO L231 Difference]: Finished difference. Result has 307 places, 390 transitions, 5073 flow [2024-06-04 14:44:34,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4599, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5073, PETRI_PLACES=307, PETRI_TRANSITIONS=390} [2024-06-04 14:44:34,391 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-04 14:44:34,391 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 390 transitions, 5073 flow [2024-06-04 14:44:34,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-04 14:44:34,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:34,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:44:34,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 14:44:34,391 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:44:34,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:34,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1978493211, now seen corresponding path program 15 times [2024-06-04 14:44:34,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:34,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677095263] [2024-06-04 14:44:34,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:34,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:37,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:44:37,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:37,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677095263] [2024-06-04 14:44:37,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677095263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:37,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:37,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:44:37,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356204322] [2024-06-04 14:44:37,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:37,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:44:37,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:37,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:44:37,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:44:37,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:44:37,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 390 transitions, 5073 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-04 14:44:37,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:37,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:44:37,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:40,317 INFO L124 PetriNetUnfolderBase]: 5224/8079 cut-off events. [2024-06-04 14:44:40,317 INFO L125 PetriNetUnfolderBase]: For 1509684/1509700 co-relation queries the response was YES. [2024-06-04 14:44:40,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87994 conditions, 8079 events. 5224/8079 cut-off events. For 1509684/1509700 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 47700 event pairs, 1016 based on Foata normal form. 30/8105 useless extension candidates. Maximal degree in co-relation 87855. Up to 5019 conditions per place. [2024-06-04 14:44:40,416 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 308 selfloop transitions, 129 changer transitions 0/440 dead transitions. [2024-06-04 14:44:40,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 440 transitions, 6633 flow [2024-06-04 14:44:40,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:44:40,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:44:40,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-04 14:44:40,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40232558139534885 [2024-06-04 14:44:40,418 INFO L175 Difference]: Start difference. First operand has 307 places, 390 transitions, 5073 flow. Second operand 10 states and 173 transitions. [2024-06-04 14:44:40,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 440 transitions, 6633 flow [2024-06-04 14:44:42,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 440 transitions, 6447 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-04 14:44:42,305 INFO L231 Difference]: Finished difference. Result has 312 places, 391 transitions, 5257 flow [2024-06-04 14:44:42,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4887, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5257, PETRI_PLACES=312, PETRI_TRANSITIONS=391} [2024-06-04 14:44:42,305 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 268 predicate places. [2024-06-04 14:44:42,305 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 391 transitions, 5257 flow [2024-06-04 14:44:42,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-04 14:44:42,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:42,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:44:42,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-04 14:44:42,306 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:44:42,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:42,306 INFO L85 PathProgramCache]: Analyzing trace with hash 2013339189, now seen corresponding path program 2 times [2024-06-04 14:44:42,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:42,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141287343] [2024-06-04 14:44:42,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:42,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:42,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:45,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:44:45,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:45,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141287343] [2024-06-04 14:44:45,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141287343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:45,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:45,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:44:45,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301560934] [2024-06-04 14:44:45,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:45,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:44:45,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:45,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:44:45,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:44:45,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:44:45,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 391 transitions, 5257 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 14:44:45,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:45,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:44:45,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:47,555 INFO L124 PetriNetUnfolderBase]: 5234/8094 cut-off events. [2024-06-04 14:44:47,555 INFO L125 PetriNetUnfolderBase]: For 1482183/1482183 co-relation queries the response was YES. [2024-06-04 14:44:47,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88686 conditions, 8094 events. 5234/8094 cut-off events. For 1482183/1482183 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 48099 event pairs, 1224 based on Foata normal form. 2/8094 useless extension candidates. Maximal degree in co-relation 88545. Up to 8053 conditions per place. [2024-06-04 14:44:47,675 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 384 selfloop transitions, 19 changer transitions 0/406 dead transitions. [2024-06-04 14:44:47,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 406 transitions, 6191 flow [2024-06-04 14:44:47,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:44:47,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:44:47,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2024-06-04 14:44:47,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33430232558139533 [2024-06-04 14:44:47,677 INFO L175 Difference]: Start difference. First operand has 312 places, 391 transitions, 5257 flow. Second operand 8 states and 115 transitions. [2024-06-04 14:44:47,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 406 transitions, 6191 flow [2024-06-04 14:44:49,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 406 transitions, 5857 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-04 14:44:49,955 INFO L231 Difference]: Finished difference. Result has 312 places, 394 transitions, 5064 flow [2024-06-04 14:44:49,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4923, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5064, PETRI_PLACES=312, PETRI_TRANSITIONS=394} [2024-06-04 14:44:49,956 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 268 predicate places. [2024-06-04 14:44:49,956 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 394 transitions, 5064 flow [2024-06-04 14:44:49,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 14:44:49,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:49,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:44:49,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-04 14:44:49,956 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:44:49,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:49,957 INFO L85 PathProgramCache]: Analyzing trace with hash 2012863959, now seen corresponding path program 3 times [2024-06-04 14:44:49,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:49,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891124065] [2024-06-04 14:44:49,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:49,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:49,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:44:52,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:52,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891124065] [2024-06-04 14:44:52,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891124065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:52,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:52,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:44:52,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100222651] [2024-06-04 14:44:52,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:52,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:44:52,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:52,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:44:52,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:44:52,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:44:52,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 394 transitions, 5064 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:52,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:52,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:44:52,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:54,732 INFO L124 PetriNetUnfolderBase]: 5244/8107 cut-off events. [2024-06-04 14:44:54,732 INFO L125 PetriNetUnfolderBase]: For 1494027/1494043 co-relation queries the response was YES. [2024-06-04 14:44:54,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88018 conditions, 8107 events. 5244/8107 cut-off events. For 1494027/1494043 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 48167 event pairs, 1216 based on Foata normal form. 16/8119 useless extension candidates. Maximal degree in co-relation 87876. Up to 8010 conditions per place. [2024-06-04 14:44:54,839 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 371 selfloop transitions, 43 changer transitions 0/417 dead transitions. [2024-06-04 14:44:54,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 417 transitions, 6346 flow [2024-06-04 14:44:54,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:44:54,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:44:54,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-04 14:44:54,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3546511627906977 [2024-06-04 14:44:54,842 INFO L175 Difference]: Start difference. First operand has 312 places, 394 transitions, 5064 flow. Second operand 8 states and 122 transitions. [2024-06-04 14:44:54,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 417 transitions, 6346 flow [2024-06-04 14:44:56,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 417 transitions, 6199 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-04 14:44:56,654 INFO L231 Difference]: Finished difference. Result has 313 places, 400 transitions, 5207 flow [2024-06-04 14:44:56,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4917, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5207, PETRI_PLACES=313, PETRI_TRANSITIONS=400} [2024-06-04 14:44:56,655 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 269 predicate places. [2024-06-04 14:44:56,655 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 400 transitions, 5207 flow [2024-06-04 14:44:56,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:56,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:56,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:44:56,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-04 14:44:56,656 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:44:56,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:56,656 INFO L85 PathProgramCache]: Analyzing trace with hash -818338667, now seen corresponding path program 4 times [2024-06-04 14:44:56,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:56,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391450169] [2024-06-04 14:44:56,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:56,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:44:59,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:59,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391450169] [2024-06-04 14:44:59,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391450169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:59,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:59,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:44:59,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487163787] [2024-06-04 14:44:59,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:59,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:44:59,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:59,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:44:59,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:44:59,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:44:59,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 400 transitions, 5207 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:59,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:59,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:44:59,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:45:01,695 INFO L124 PetriNetUnfolderBase]: 5254/8124 cut-off events. [2024-06-04 14:45:01,695 INFO L125 PetriNetUnfolderBase]: For 1522543/1522553 co-relation queries the response was YES. [2024-06-04 14:45:01,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88658 conditions, 8124 events. 5254/8124 cut-off events. For 1522543/1522553 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 48276 event pairs, 1231 based on Foata normal form. 7/8126 useless extension candidates. Maximal degree in co-relation 88516. Up to 7928 conditions per place. [2024-06-04 14:45:01,801 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 358 selfloop transitions, 60 changer transitions 0/421 dead transitions. [2024-06-04 14:45:01,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 421 transitions, 6459 flow [2024-06-04 14:45:01,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:45:01,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:45:01,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-04 14:45:01,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36046511627906974 [2024-06-04 14:45:01,802 INFO L175 Difference]: Start difference. First operand has 313 places, 400 transitions, 5207 flow. Second operand 8 states and 124 transitions. [2024-06-04 14:45:01,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 421 transitions, 6459 flow [2024-06-04 14:45:03,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 421 transitions, 6338 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-04 14:45:03,724 INFO L231 Difference]: Finished difference. Result has 317 places, 406 transitions, 5394 flow [2024-06-04 14:45:03,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5086, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5394, PETRI_PLACES=317, PETRI_TRANSITIONS=406} [2024-06-04 14:45:03,725 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 273 predicate places. [2024-06-04 14:45:03,725 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 406 transitions, 5394 flow [2024-06-04 14:45:03,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:45:03,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:45:03,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:45:03,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-04 14:45:03,726 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:45:03,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:45:03,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1870016207, now seen corresponding path program 4 times [2024-06-04 14:45:03,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:45:03,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229984040] [2024-06-04 14:45:03,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:45:03,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:45:03,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:45:06,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:45:06,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:45:06,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229984040] [2024-06-04 14:45:06,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229984040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:45:06,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:45:06,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:45:06,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353146463] [2024-06-04 14:45:06,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:45:06,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:45:06,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:45:06,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:45:06,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:45:06,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:45:06,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 406 transitions, 5394 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:45:06,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:45:06,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:45:06,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:45:08,577 INFO L124 PetriNetUnfolderBase]: 5256/8124 cut-off events. [2024-06-04 14:45:08,577 INFO L125 PetriNetUnfolderBase]: For 1548029/1548045 co-relation queries the response was YES. [2024-06-04 14:45:08,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89405 conditions, 8124 events. 5256/8124 cut-off events. For 1548029/1548045 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 48261 event pairs, 1219 based on Foata normal form. 16/8136 useless extension candidates. Maximal degree in co-relation 89261. Up to 8064 conditions per place. [2024-06-04 14:45:08,698 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 395 selfloop transitions, 25 changer transitions 0/423 dead transitions. [2024-06-04 14:45:08,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 423 transitions, 6382 flow [2024-06-04 14:45:08,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:45:08,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:45:08,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2024-06-04 14:45:08,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3372093023255814 [2024-06-04 14:45:08,699 INFO L175 Difference]: Start difference. First operand has 317 places, 406 transitions, 5394 flow. Second operand 8 states and 116 transitions. [2024-06-04 14:45:08,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 423 transitions, 6382 flow [2024-06-04 14:45:10,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 423 transitions, 6246 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-04 14:45:10,849 INFO L231 Difference]: Finished difference. Result has 321 places, 409 transitions, 5418 flow [2024-06-04 14:45:10,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5258, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5418, PETRI_PLACES=321, PETRI_TRANSITIONS=409} [2024-06-04 14:45:10,849 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 277 predicate places. [2024-06-04 14:45:10,849 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 409 transitions, 5418 flow [2024-06-04 14:45:10,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:45:10,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:45:10,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:45:10,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-04 14:45:10,850 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:45:10,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:45:10,850 INFO L85 PathProgramCache]: Analyzing trace with hash -818754377, now seen corresponding path program 5 times [2024-06-04 14:45:10,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:45:10,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352389499] [2024-06-04 14:45:10,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:45:10,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:45:10,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:45:13,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:45:13,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:45:13,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352389499] [2024-06-04 14:45:13,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352389499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:45:13,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:45:13,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:45:13,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045139062] [2024-06-04 14:45:13,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:45:13,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:45:13,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:45:13,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:45:13,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:45:13,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:45:13,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 409 transitions, 5418 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:45:13,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:45:13,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:45:13,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:45:15,721 INFO L124 PetriNetUnfolderBase]: 5266/8141 cut-off events. [2024-06-04 14:45:15,721 INFO L125 PetriNetUnfolderBase]: For 1573729/1573739 co-relation queries the response was YES. [2024-06-04 14:45:15,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89663 conditions, 8141 events. 5266/8141 cut-off events. For 1573729/1573739 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 48381 event pairs, 1231 based on Foata normal form. 7/8143 useless extension candidates. Maximal degree in co-relation 89517. Up to 7990 conditions per place. [2024-06-04 14:45:15,822 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 383 selfloop transitions, 40 changer transitions 0/426 dead transitions. [2024-06-04 14:45:15,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 426 transitions, 6396 flow [2024-06-04 14:45:15,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:45:15,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:45:15,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-04 14:45:15,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35174418604651164 [2024-06-04 14:45:15,823 INFO L175 Difference]: Start difference. First operand has 321 places, 409 transitions, 5418 flow. Second operand 8 states and 121 transitions. [2024-06-04 14:45:15,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 426 transitions, 6396 flow [2024-06-04 14:45:18,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 426 transitions, 6268 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-04 14:45:18,326 INFO L231 Difference]: Finished difference. Result has 323 places, 412 transitions, 5472 flow [2024-06-04 14:45:18,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5290, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5472, PETRI_PLACES=323, PETRI_TRANSITIONS=412} [2024-06-04 14:45:18,327 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 279 predicate places. [2024-06-04 14:45:18,327 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 412 transitions, 5472 flow [2024-06-04 14:45:18,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:45:18,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:45:18,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:45:18,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-04 14:45:18,327 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:45:18,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:45:18,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1870015773, now seen corresponding path program 6 times [2024-06-04 14:45:18,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:45:18,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645121059] [2024-06-04 14:45:18,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:45:18,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:45:18,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:45:21,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:45:21,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:45:21,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645121059] [2024-06-04 14:45:21,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645121059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:45:21,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:45:21,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:45:21,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207246156] [2024-06-04 14:45:21,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:45:21,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:45:21,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:45:21,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:45:21,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:45:21,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:45:21,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 412 transitions, 5472 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:45:21,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:45:21,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:45:21,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:45:23,231 INFO L124 PetriNetUnfolderBase]: 5260/8133 cut-off events. [2024-06-04 14:45:23,231 INFO L125 PetriNetUnfolderBase]: For 1588198/1588208 co-relation queries the response was YES. [2024-06-04 14:45:23,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89570 conditions, 8133 events. 5260/8133 cut-off events. For 1588198/1588208 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 48360 event pairs, 1230 based on Foata normal form. 7/8135 useless extension candidates. Maximal degree in co-relation 89423. Up to 7973 conditions per place. [2024-06-04 14:45:23,352 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 379 selfloop transitions, 45 changer transitions 0/427 dead transitions. [2024-06-04 14:45:23,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 427 transitions, 6366 flow [2024-06-04 14:45:23,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:45:23,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:45:23,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-04 14:45:23,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36046511627906974 [2024-06-04 14:45:23,353 INFO L175 Difference]: Start difference. First operand has 323 places, 412 transitions, 5472 flow. Second operand 8 states and 124 transitions. [2024-06-04 14:45:23,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 427 transitions, 6366 flow [2024-06-04 14:45:26,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 427 transitions, 6160 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-04 14:45:26,159 INFO L231 Difference]: Finished difference. Result has 325 places, 412 transitions, 5362 flow [2024-06-04 14:45:26,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5266, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5362, PETRI_PLACES=325, PETRI_TRANSITIONS=412} [2024-06-04 14:45:26,160 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 281 predicate places. [2024-06-04 14:45:26,160 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 412 transitions, 5362 flow [2024-06-04 14:45:26,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:45:26,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:45:26,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:45:26,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-04 14:45:26,161 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:45:26,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:45:26,161 INFO L85 PathProgramCache]: Analyzing trace with hash -111168307, now seen corresponding path program 1 times [2024-06-04 14:45:26,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:45:26,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586328111] [2024-06-04 14:45:26,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:45:26,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:45:26,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:45:28,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:45:28,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:45:28,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586328111] [2024-06-04 14:45:28,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586328111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:45:28,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:45:28,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:45:28,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359489616] [2024-06-04 14:45:28,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:45:28,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:45:28,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:45:28,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:45:28,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:45:29,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-04 14:45:29,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 412 transitions, 5362 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-04 14:45:29,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:45:29,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-04 14:45:29,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:45:31,325 INFO L124 PetriNetUnfolderBase]: 5091/7960 cut-off events. [2024-06-04 14:45:31,325 INFO L125 PetriNetUnfolderBase]: For 1599795/1599795 co-relation queries the response was YES. [2024-06-04 14:45:31,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88059 conditions, 7960 events. 5091/7960 cut-off events. For 1599795/1599795 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 48049 event pairs, 1181 based on Foata normal form. 2/7960 useless extension candidates. Maximal degree in co-relation 87911. Up to 7752 conditions per place. [2024-06-04 14:45:31,430 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 403 selfloop transitions, 19 changer transitions 0/436 dead transitions. [2024-06-04 14:45:31,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 436 transitions, 6394 flow [2024-06-04 14:45:31,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:45:31,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:45:31,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-04 14:45:31,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-04 14:45:31,431 INFO L175 Difference]: Start difference. First operand has 325 places, 412 transitions, 5362 flow. Second operand 8 states and 131 transitions. [2024-06-04 14:45:31,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 436 transitions, 6394 flow [2024-06-04 14:45:33,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 436 transitions, 6226 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-04 14:45:33,958 INFO L231 Difference]: Finished difference. Result has 325 places, 415 transitions, 5335 flow [2024-06-04 14:45:33,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5194, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5335, PETRI_PLACES=325, PETRI_TRANSITIONS=415} [2024-06-04 14:45:33,958 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 281 predicate places. [2024-06-04 14:45:33,958 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 415 transitions, 5335 flow [2024-06-04 14:45:33,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-04 14:45:33,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:45:33,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:45:33,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-04 14:45:33,959 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:45:33,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:45:33,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1647655191, now seen corresponding path program 1 times [2024-06-04 14:45:33,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:45:33,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300803961] [2024-06-04 14:45:33,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:45:33,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:45:33,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:45:37,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:45:37,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:45:37,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300803961] [2024-06-04 14:45:37,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300803961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:45:37,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:45:37,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:45:37,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460812954] [2024-06-04 14:45:37,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:45:37,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:45:37,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:45:37,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:45:37,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:45:37,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-04 14:45:37,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 415 transitions, 5335 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-04 14:45:37,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:45:37,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-04 14:45:37,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:45:39,628 INFO L124 PetriNetUnfolderBase]: 5110/7991 cut-off events. [2024-06-04 14:45:39,628 INFO L125 PetriNetUnfolderBase]: For 1653839/1653843 co-relation queries the response was YES. [2024-06-04 14:45:39,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89010 conditions, 7991 events. 5110/7991 cut-off events. For 1653839/1653843 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 48332 event pairs, 1180 based on Foata normal form. 6/7994 useless extension candidates. Maximal degree in co-relation 88862. Up to 7785 conditions per place. [2024-06-04 14:45:39,724 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 407 selfloop transitions, 18 changer transitions 0/439 dead transitions. [2024-06-04 14:45:39,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 439 transitions, 6397 flow [2024-06-04 14:45:39,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:45:39,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:45:39,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-04 14:45:39,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-04 14:45:39,725 INFO L175 Difference]: Start difference. First operand has 325 places, 415 transitions, 5335 flow. Second operand 8 states and 130 transitions. [2024-06-04 14:45:39,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 439 transitions, 6397 flow [2024-06-04 14:45:42,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 439 transitions, 6280 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-04 14:45:42,107 INFO L231 Difference]: Finished difference. Result has 327 places, 419 transitions, 5345 flow [2024-06-04 14:45:42,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5218, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5345, PETRI_PLACES=327, PETRI_TRANSITIONS=419} [2024-06-04 14:45:42,107 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 283 predicate places. [2024-06-04 14:45:42,108 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 419 transitions, 5345 flow [2024-06-04 14:45:42,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-04 14:45:42,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:45:42,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:45:42,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-04 14:45:42,108 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:45:42,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:45:42,108 INFO L85 PathProgramCache]: Analyzing trace with hash 197753211, now seen corresponding path program 2 times [2024-06-04 14:45:42,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:45:42,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640744118] [2024-06-04 14:45:42,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:45:42,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:45:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:45:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:45:44,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:45:44,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640744118] [2024-06-04 14:45:45,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640744118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:45:45,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:45:45,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:45:45,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845221064] [2024-06-04 14:45:45,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:45:45,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:45:45,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:45:45,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:45:45,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:45:45,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-04 14:45:45,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 419 transitions, 5345 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-04 14:45:45,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:45:45,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-04 14:45:45,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:45:47,200 INFO L124 PetriNetUnfolderBase]: 5111/7992 cut-off events. [2024-06-04 14:45:47,200 INFO L125 PetriNetUnfolderBase]: For 1657150/1657154 co-relation queries the response was YES. [2024-06-04 14:45:47,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89789 conditions, 7992 events. 5111/7992 cut-off events. For 1657150/1657154 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 48344 event pairs, 1182 based on Foata normal form. 1/7991 useless extension candidates. Maximal degree in co-relation 89640. Up to 7806 conditions per place. [2024-06-04 14:45:47,322 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 405 selfloop transitions, 17 changer transitions 0/436 dead transitions. [2024-06-04 14:45:47,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 436 transitions, 6285 flow [2024-06-04 14:45:47,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:45:47,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:45:47,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-04 14:45:47,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35755813953488375 [2024-06-04 14:45:47,323 INFO L175 Difference]: Start difference. First operand has 327 places, 419 transitions, 5345 flow. Second operand 8 states and 123 transitions. [2024-06-04 14:45:47,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 436 transitions, 6285 flow [2024-06-04 14:45:49,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 436 transitions, 6186 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-04 14:45:49,865 INFO L231 Difference]: Finished difference. Result has 329 places, 422 transitions, 5348 flow [2024-06-04 14:45:49,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5246, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5348, PETRI_PLACES=329, PETRI_TRANSITIONS=422} [2024-06-04 14:45:49,865 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 285 predicate places. [2024-06-04 14:45:49,865 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 422 transitions, 5348 flow [2024-06-04 14:45:49,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-04 14:45:49,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:45:49,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:45:49,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-04 14:45:49,866 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:45:49,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:45:49,866 INFO L85 PathProgramCache]: Analyzing trace with hash 197746701, now seen corresponding path program 3 times [2024-06-04 14:45:49,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:45:49,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833074768] [2024-06-04 14:45:49,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:45:49,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:45:49,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:45:52,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:45:52,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:45:52,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833074768] [2024-06-04 14:45:52,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833074768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:45:52,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:45:52,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:45:52,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932931853] [2024-06-04 14:45:52,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:45:52,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:45:52,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:45:52,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:45:52,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:45:52,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-04 14:45:52,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 422 transitions, 5348 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-04 14:45:52,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:45:52,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-04 14:45:52,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:45:54,998 INFO L124 PetriNetUnfolderBase]: 5130/8023 cut-off events. [2024-06-04 14:45:54,998 INFO L125 PetriNetUnfolderBase]: For 1703259/1703273 co-relation queries the response was YES. [2024-06-04 14:45:55,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90738 conditions, 8023 events. 5130/8023 cut-off events. For 1703259/1703273 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 48562 event pairs, 1182 based on Foata normal form. 9/8029 useless extension candidates. Maximal degree in co-relation 90588. Up to 7819 conditions per place. [2024-06-04 14:45:55,105 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 411 selfloop transitions, 18 changer transitions 0/443 dead transitions. [2024-06-04 14:45:55,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 443 transitions, 6426 flow [2024-06-04 14:45:55,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:45:55,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:45:55,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-04 14:45:55,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-04 14:45:55,106 INFO L175 Difference]: Start difference. First operand has 329 places, 422 transitions, 5348 flow. Second operand 8 states and 127 transitions. [2024-06-04 14:45:55,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 443 transitions, 6426 flow [2024-06-04 14:45:57,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 443 transitions, 6346 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-04 14:45:57,626 INFO L231 Difference]: Finished difference. Result has 331 places, 426 transitions, 5409 flow [2024-06-04 14:45:57,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5268, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5409, PETRI_PLACES=331, PETRI_TRANSITIONS=426} [2024-06-04 14:45:57,626 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 287 predicate places. [2024-06-04 14:45:57,626 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 426 transitions, 5409 flow [2024-06-04 14:45:57,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-04 14:45:57,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:45:57,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:45:57,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-04 14:45:57,627 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:45:57,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:45:57,627 INFO L85 PathProgramCache]: Analyzing trace with hash 2004774013, now seen corresponding path program 4 times [2024-06-04 14:45:57,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:45:57,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748454005] [2024-06-04 14:45:57,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:45:57,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:45:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:46:00,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:46:00,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:46:00,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748454005] [2024-06-04 14:46:00,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748454005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:46:00,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:46:00,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:46:00,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298408094] [2024-06-04 14:46:00,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:46:00,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:46:00,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:46:00,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:46:00,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:46:00,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-04 14:46:00,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 426 transitions, 5409 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-04 14:46:00,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:46:00,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-04 14:46:00,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:46:02,737 INFO L124 PetriNetUnfolderBase]: 5136/8031 cut-off events. [2024-06-04 14:46:02,737 INFO L125 PetriNetUnfolderBase]: For 1703172/1703176 co-relation queries the response was YES. [2024-06-04 14:46:02,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91704 conditions, 8031 events. 5136/8031 cut-off events. For 1703172/1703176 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 48571 event pairs, 1184 based on Foata normal form. 2/8031 useless extension candidates. Maximal degree in co-relation 91553. Up to 7839 conditions per place. [2024-06-04 14:46:02,858 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 411 selfloop transitions, 17 changer transitions 0/442 dead transitions. [2024-06-04 14:46:02,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 442 transitions, 6389 flow [2024-06-04 14:46:02,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:46:02,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:46:02,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-04 14:46:02,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3546511627906977 [2024-06-04 14:46:02,859 INFO L175 Difference]: Start difference. First operand has 331 places, 426 transitions, 5409 flow. Second operand 8 states and 122 transitions. [2024-06-04 14:46:02,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 442 transitions, 6389 flow [2024-06-04 14:46:05,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 442 transitions, 6276 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-04 14:46:05,902 INFO L231 Difference]: Finished difference. Result has 333 places, 429 transitions, 5408 flow [2024-06-04 14:46:05,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5296, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5408, PETRI_PLACES=333, PETRI_TRANSITIONS=429} [2024-06-04 14:46:05,902 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 289 predicate places. [2024-06-04 14:46:05,902 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 429 transitions, 5408 flow [2024-06-04 14:46:05,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-04 14:46:05,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:46:05,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:46:05,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-04 14:46:05,903 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:46:05,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:46:05,904 INFO L85 PathProgramCache]: Analyzing trace with hash 2004767503, now seen corresponding path program 5 times [2024-06-04 14:46:05,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:46:05,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929077798] [2024-06-04 14:46:05,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:46:05,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:46:05,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:46:09,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:46:09,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:46:09,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929077798] [2024-06-04 14:46:09,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929077798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:46:09,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:46:09,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:46:09,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758187565] [2024-06-04 14:46:09,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:46:09,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:46:09,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:46:09,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:46:09,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:46:09,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-04 14:46:09,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 429 transitions, 5408 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-04 14:46:09,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:46:09,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-04 14:46:09,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:46:11,606 INFO L124 PetriNetUnfolderBase]: 5149/8052 cut-off events. [2024-06-04 14:46:11,606 INFO L125 PetriNetUnfolderBase]: For 1734439/1734439 co-relation queries the response was YES. [2024-06-04 14:46:11,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92462 conditions, 8052 events. 5149/8052 cut-off events. For 1734439/1734439 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 48762 event pairs, 1185 based on Foata normal form. 4/8054 useless extension candidates. Maximal degree in co-relation 92310. Up to 7860 conditions per place. [2024-06-04 14:46:11,726 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 416 selfloop transitions, 18 changer transitions 0/448 dead transitions. [2024-06-04 14:46:11,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 448 transitions, 6480 flow [2024-06-04 14:46:11,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:46:11,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:46:11,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-04 14:46:11,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3546511627906977 [2024-06-04 14:46:11,728 INFO L175 Difference]: Start difference. First operand has 333 places, 429 transitions, 5408 flow. Second operand 8 states and 122 transitions. [2024-06-04 14:46:11,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 448 transitions, 6480 flow [2024-06-04 14:46:14,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 448 transitions, 6404 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-04 14:46:14,863 INFO L231 Difference]: Finished difference. Result has 336 places, 436 transitions, 5547 flow [2024-06-04 14:46:14,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5332, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5547, PETRI_PLACES=336, PETRI_TRANSITIONS=436} [2024-06-04 14:46:14,863 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 292 predicate places. [2024-06-04 14:46:14,863 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 436 transitions, 5547 flow [2024-06-04 14:46:14,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-04 14:46:14,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:46:14,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:46:14,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-04 14:46:14,864 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:46:14,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:46:14,864 INFO L85 PathProgramCache]: Analyzing trace with hash 2005004653, now seen corresponding path program 6 times [2024-06-04 14:46:14,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:46:14,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298213388] [2024-06-04 14:46:14,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:46:14,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:46:14,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:46:17,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:46:17,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:46:17,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298213388] [2024-06-04 14:46:17,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298213388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:46:17,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:46:17,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:46:17,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400110885] [2024-06-04 14:46:17,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:46:17,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:46:17,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:46:17,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:46:17,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:46:17,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-04 14:46:17,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 436 transitions, 5547 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-04 14:46:17,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:46:17,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-04 14:46:17,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:46:19,999 INFO L124 PetriNetUnfolderBase]: 5148/8051 cut-off events. [2024-06-04 14:46:19,999 INFO L125 PetriNetUnfolderBase]: For 1744869/1744869 co-relation queries the response was YES. [2024-06-04 14:46:20,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92984 conditions, 8051 events. 5148/8051 cut-off events. For 1744869/1744869 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 48738 event pairs, 1185 based on Foata normal form. 3/8052 useless extension candidates. Maximal degree in co-relation 92830. Up to 7852 conditions per place. [2024-06-04 14:46:20,118 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 419 selfloop transitions, 19 changer transitions 0/452 dead transitions. [2024-06-04 14:46:20,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 452 transitions, 6561 flow [2024-06-04 14:46:20,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:46:20,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:46:20,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-04 14:46:20,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3546511627906977 [2024-06-04 14:46:20,119 INFO L175 Difference]: Start difference. First operand has 336 places, 436 transitions, 5547 flow. Second operand 8 states and 122 transitions. [2024-06-04 14:46:20,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 452 transitions, 6561 flow [2024-06-04 14:46:22,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 452 transitions, 6409 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-04 14:46:22,500 INFO L231 Difference]: Finished difference. Result has 340 places, 439 transitions, 5521 flow [2024-06-04 14:46:22,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5395, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5521, PETRI_PLACES=340, PETRI_TRANSITIONS=439} [2024-06-04 14:46:22,500 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 296 predicate places. [2024-06-04 14:46:22,500 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 439 transitions, 5521 flow [2024-06-04 14:46:22,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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) [2024-06-04 14:46:22,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:46:22,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:46:22,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-04 14:46:22,501 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:46:22,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:46:22,502 INFO L85 PathProgramCache]: Analyzing trace with hash 2013356053, now seen corresponding path program 1 times [2024-06-04 14:46:22,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:46:22,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556646767] [2024-06-04 14:46:22,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:46:22,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:46:22,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:46:26,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:46:26,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:46:26,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556646767] [2024-06-04 14:46:26,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556646767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:46:26,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:46:26,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:46:26,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553635280] [2024-06-04 14:46:26,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:46:26,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:46:26,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:46:26,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:46:26,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:46:26,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:46:26,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 439 transitions, 5521 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:46:26,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:46:26,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:46:26,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:46:28,425 INFO L124 PetriNetUnfolderBase]: 5353/8262 cut-off events. [2024-06-04 14:46:28,425 INFO L125 PetriNetUnfolderBase]: For 1764308/1764308 co-relation queries the response was YES. [2024-06-04 14:46:28,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94932 conditions, 8262 events. 5353/8262 cut-off events. For 1764308/1764308 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 49043 event pairs, 1236 based on Foata normal form. 2/8262 useless extension candidates. Maximal degree in co-relation 94776. Up to 8223 conditions per place. [2024-06-04 14:46:28,541 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 432 selfloop transitions, 19 changer transitions 0/454 dead transitions. [2024-06-04 14:46:28,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 454 transitions, 6543 flow [2024-06-04 14:46:28,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:46:28,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:46:28,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 124 transitions. [2024-06-04 14:46:28,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32041343669250644 [2024-06-04 14:46:28,543 INFO L175 Difference]: Start difference. First operand has 340 places, 439 transitions, 5521 flow. Second operand 9 states and 124 transitions. [2024-06-04 14:46:28,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 454 transitions, 6543 flow [2024-06-04 14:46:31,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 454 transitions, 6457 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-04 14:46:31,564 INFO L231 Difference]: Finished difference. Result has 343 places, 441 transitions, 5568 flow [2024-06-04 14:46:31,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5435, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5568, PETRI_PLACES=343, PETRI_TRANSITIONS=441} [2024-06-04 14:46:31,564 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-04 14:46:31,565 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 441 transitions, 5568 flow [2024-06-04 14:46:31,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:46:31,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:46:31,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:46:31,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-04 14:46:31,565 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:46:31,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:46:31,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1388452617, now seen corresponding path program 1 times [2024-06-04 14:46:31,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:46:31,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827463365] [2024-06-04 14:46:31,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:46:31,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:46:31,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:46:35,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:46:35,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:46:35,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827463365] [2024-06-04 14:46:35,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827463365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:46:35,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:46:35,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-04 14:46:35,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761096531] [2024-06-04 14:46:35,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:46:35,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-04 14:46:35,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:46:35,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-04 14:46:35,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-04 14:46:35,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:46:35,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 441 transitions, 5568 flow. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:46:35,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:46:35,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:46:35,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:46:38,464 INFO L124 PetriNetUnfolderBase]: 5394/8331 cut-off events. [2024-06-04 14:46:38,464 INFO L125 PetriNetUnfolderBase]: For 1839742/1839748 co-relation queries the response was YES. [2024-06-04 14:46:38,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96137 conditions, 8331 events. 5394/8331 cut-off events. For 1839742/1839748 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 49331 event pairs, 1005 based on Foata normal form. 18/8347 useless extension candidates. Maximal degree in co-relation 95980. Up to 8055 conditions per place. [2024-06-04 14:46:38,576 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 457 selfloop transitions, 32 changer transitions 0/492 dead transitions. [2024-06-04 14:46:38,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 492 transitions, 6850 flow [2024-06-04 14:46:38,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:46:38,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:46:38,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-04 14:46:38,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-04 14:46:38,577 INFO L175 Difference]: Start difference. First operand has 343 places, 441 transitions, 5568 flow. Second operand 11 states and 176 transitions. [2024-06-04 14:46:38,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 492 transitions, 6850 flow [2024-06-04 14:46:42,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 492 transitions, 6725 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-04 14:46:42,131 INFO L231 Difference]: Finished difference. Result has 348 places, 444 transitions, 5652 flow [2024-06-04 14:46:42,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5443, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5652, PETRI_PLACES=348, PETRI_TRANSITIONS=444} [2024-06-04 14:46:42,131 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 304 predicate places. [2024-06-04 14:46:42,131 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 444 transitions, 5652 flow [2024-06-04 14:46:42,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:46:42,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:46:42,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:46:42,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-04 14:46:42,132 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:46:42,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:46:42,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1102073809, now seen corresponding path program 2 times [2024-06-04 14:46:42,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:46:42,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878487402] [2024-06-04 14:46:42,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:46:42,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:46:42,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:46:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:46:46,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:46:46,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878487402] [2024-06-04 14:46:46,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878487402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:46:46,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:46:46,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-04 14:46:46,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915699990] [2024-06-04 14:46:46,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:46:46,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-04 14:46:46,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:46:46,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-04 14:46:46,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-04 14:46:46,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:46:46,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 444 transitions, 5652 flow. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:46:46,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:46:46,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:46:46,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:46:49,263 INFO L124 PetriNetUnfolderBase]: 5452/8429 cut-off events. [2024-06-04 14:46:49,263 INFO L125 PetriNetUnfolderBase]: For 1879654/1879660 co-relation queries the response was YES. [2024-06-04 14:46:49,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97649 conditions, 8429 events. 5452/8429 cut-off events. For 1879654/1879660 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 50413 event pairs, 1164 based on Foata normal form. 18/8445 useless extension candidates. Maximal degree in co-relation 97490. Up to 8047 conditions per place. [2024-06-04 14:46:49,381 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 443 selfloop transitions, 50 changer transitions 0/496 dead transitions. [2024-06-04 14:46:49,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 496 transitions, 6958 flow [2024-06-04 14:46:49,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:46:49,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:46:49,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-04 14:46:49,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38054968287526425 [2024-06-04 14:46:49,383 INFO L175 Difference]: Start difference. First operand has 348 places, 444 transitions, 5652 flow. Second operand 11 states and 180 transitions. [2024-06-04 14:46:49,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 496 transitions, 6958 flow [2024-06-04 14:46:52,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 496 transitions, 6790 flow, removed 54 selfloop flow, removed 8 redundant places. [2024-06-04 14:46:52,853 INFO L231 Difference]: Finished difference. Result has 352 places, 448 transitions, 5747 flow [2024-06-04 14:46:52,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5484, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5747, PETRI_PLACES=352, PETRI_TRANSITIONS=448} [2024-06-04 14:46:52,853 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 308 predicate places. [2024-06-04 14:46:52,854 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 448 transitions, 5747 flow [2024-06-04 14:46:52,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:46:52,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:46:52,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:46:52,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-04 14:46:52,854 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:46:52,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:46:52,854 INFO L85 PathProgramCache]: Analyzing trace with hash -648315159, now seen corresponding path program 3 times [2024-06-04 14:46:52,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:46:52,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917684209] [2024-06-04 14:46:52,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:46:52,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:46:52,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:46:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:46:57,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:46:57,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917684209] [2024-06-04 14:46:57,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917684209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:46:57,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:46:57,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-04 14:46:57,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475803521] [2024-06-04 14:46:57,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:46:57,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-04 14:46:57,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:46:57,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-04 14:46:57,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-04 14:46:58,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:46:58,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 448 transitions, 5747 flow. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:46:58,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:46:58,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:46:58,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:47:01,134 INFO L124 PetriNetUnfolderBase]: 5493/8500 cut-off events. [2024-06-04 14:47:01,134 INFO L125 PetriNetUnfolderBase]: For 1933212/1933218 co-relation queries the response was YES. [2024-06-04 14:47:01,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98645 conditions, 8500 events. 5493/8500 cut-off events. For 1933212/1933218 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 51040 event pairs, 1184 based on Foata normal form. 18/8516 useless extension candidates. Maximal degree in co-relation 98484. Up to 8154 conditions per place. [2024-06-04 14:47:01,261 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 446 selfloop transitions, 49 changer transitions 0/498 dead transitions. [2024-06-04 14:47:01,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 498 transitions, 7034 flow [2024-06-04 14:47:01,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:47:01,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:47:01,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-04 14:47:01,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3784355179704017 [2024-06-04 14:47:01,263 INFO L175 Difference]: Start difference. First operand has 352 places, 448 transitions, 5747 flow. Second operand 11 states and 179 transitions. [2024-06-04 14:47:01,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 498 transitions, 7034 flow [2024-06-04 14:47:05,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 498 transitions, 6820 flow, removed 58 selfloop flow, removed 8 redundant places. [2024-06-04 14:47:05,120 INFO L231 Difference]: Finished difference. Result has 356 places, 450 transitions, 5767 flow [2024-06-04 14:47:05,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5535, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5767, PETRI_PLACES=356, PETRI_TRANSITIONS=450} [2024-06-04 14:47:05,121 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 312 predicate places. [2024-06-04 14:47:05,121 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 450 transitions, 5767 flow [2024-06-04 14:47:05,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:47:05,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:47:05,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:47:05,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-04 14:47:05,121 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:47:05,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:47:05,122 INFO L85 PathProgramCache]: Analyzing trace with hash 638583120, now seen corresponding path program 1 times [2024-06-04 14:47:05,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:47:05,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475764892] [2024-06-04 14:47:05,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:47:05,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:47:05,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:47:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:47:09,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:47:09,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475764892] [2024-06-04 14:47:09,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475764892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:47:09,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:47:09,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-04 14:47:09,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348934889] [2024-06-04 14:47:09,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:47:09,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-04 14:47:09,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:47:09,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-04 14:47:09,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-04 14:47:09,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:47:09,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 450 transitions, 5767 flow. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:47:09,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:47:09,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:47:09,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:47:13,117 INFO L124 PetriNetUnfolderBase]: 5526/8559 cut-off events. [2024-06-04 14:47:13,117 INFO L125 PetriNetUnfolderBase]: For 1972062/1972068 co-relation queries the response was YES. [2024-06-04 14:47:13,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98738 conditions, 8559 events. 5526/8559 cut-off events. For 1972062/1972068 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 51468 event pairs, 1201 based on Foata normal form. 22/8579 useless extension candidates. Maximal degree in co-relation 98575. Up to 8048 conditions per place. [2024-06-04 14:47:13,258 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 442 selfloop transitions, 56 changer transitions 0/501 dead transitions. [2024-06-04 14:47:13,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 501 transitions, 7097 flow [2024-06-04 14:47:13,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:47:13,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:47:13,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-04 14:47:13,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.386892177589852 [2024-06-04 14:47:13,260 INFO L175 Difference]: Start difference. First operand has 356 places, 450 transitions, 5767 flow. Second operand 11 states and 183 transitions. [2024-06-04 14:47:13,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 501 transitions, 7097 flow [2024-06-04 14:47:17,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 501 transitions, 6916 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-04 14:47:17,531 INFO L231 Difference]: Finished difference. Result has 359 places, 451 transitions, 5828 flow [2024-06-04 14:47:17,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5586, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5828, PETRI_PLACES=359, PETRI_TRANSITIONS=451} [2024-06-04 14:47:17,531 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 315 predicate places. [2024-06-04 14:47:17,531 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 451 transitions, 5828 flow [2024-06-04 14:47:17,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:47:17,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:47:17,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:47:17,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-04 14:47:17,532 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:47:17,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:47:17,532 INFO L85 PathProgramCache]: Analyzing trace with hash -614904405, now seen corresponding path program 4 times [2024-06-04 14:47:17,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:47:17,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053624942] [2024-06-04 14:47:17,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:47:17,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:47:17,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:47:21,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:47:21,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:47:21,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053624942] [2024-06-04 14:47:21,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053624942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:47:21,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:47:21,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-04 14:47:21,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662198951] [2024-06-04 14:47:21,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:47:21,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-04 14:47:21,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:47:21,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-04 14:47:21,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-04 14:47:22,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:47:22,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 451 transitions, 5828 flow. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:47:22,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:47:22,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:47:22,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:47:25,820 INFO L124 PetriNetUnfolderBase]: 5567/8630 cut-off events. [2024-06-04 14:47:25,820 INFO L125 PetriNetUnfolderBase]: For 1983834/1983840 co-relation queries the response was YES. [2024-06-04 14:47:26,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99616 conditions, 8630 events. 5567/8630 cut-off events. For 1983834/1983840 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 52092 event pairs, 1200 based on Foata normal form. 18/8646 useless extension candidates. Maximal degree in co-relation 99452. Up to 8330 conditions per place. [2024-06-04 14:47:26,067 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 460 selfloop transitions, 39 changer transitions 0/502 dead transitions. [2024-06-04 14:47:26,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 502 transitions, 7144 flow [2024-06-04 14:47:26,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:47:26,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:47:26,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-04 14:47:26,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37420718816067655 [2024-06-04 14:47:26,069 INFO L175 Difference]: Start difference. First operand has 359 places, 451 transitions, 5828 flow. Second operand 11 states and 177 transitions. [2024-06-04 14:47:26,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 502 transitions, 7144 flow [2024-06-04 14:47:30,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 502 transitions, 6968 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-06-04 14:47:30,581 INFO L231 Difference]: Finished difference. Result has 362 places, 454 transitions, 5887 flow [2024-06-04 14:47:30,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5652, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5887, PETRI_PLACES=362, PETRI_TRANSITIONS=454} [2024-06-04 14:47:30,582 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-04 14:47:30,582 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 454 transitions, 5887 flow [2024-06-04 14:47:30,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:47:30,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:47:30,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:47:30,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-04 14:47:30,583 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:47:30,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:47:30,583 INFO L85 PathProgramCache]: Analyzing trace with hash -346796151, now seen corresponding path program 1 times [2024-06-04 14:47:30,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:47:30,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427274302] [2024-06-04 14:47:30,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:47:30,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:47:30,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:47:32,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:47:32,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:47:32,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427274302] [2024-06-04 14:47:32,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427274302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:47:32,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:47:32,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:47:32,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425985471] [2024-06-04 14:47:32,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:47:32,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:47:32,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:47:32,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:47:32,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:47:32,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:47:32,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 454 transitions, 5887 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 14:47:32,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:47:32,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:47:32,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:47:35,584 INFO L124 PetriNetUnfolderBase]: 5577/8644 cut-off events. [2024-06-04 14:47:35,584 INFO L125 PetriNetUnfolderBase]: For 1965029/1965035 co-relation queries the response was YES. [2024-06-04 14:47:35,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99673 conditions, 8644 events. 5577/8644 cut-off events. For 1965029/1965035 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 52193 event pairs, 1218 based on Foata normal form. 8/8650 useless extension candidates. Maximal degree in co-relation 99507. Up to 8489 conditions per place. [2024-06-04 14:47:35,849 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 448 selfloop transitions, 34 changer transitions 0/485 dead transitions. [2024-06-04 14:47:35,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 485 transitions, 7063 flow [2024-06-04 14:47:35,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:47:35,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:47:35,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-04 14:47:35,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-04 14:47:35,851 INFO L175 Difference]: Start difference. First operand has 362 places, 454 transitions, 5887 flow. Second operand 8 states and 131 transitions. [2024-06-04 14:47:35,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 485 transitions, 7063 flow [2024-06-04 14:47:40,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 485 transitions, 6869 flow, removed 60 selfloop flow, removed 8 redundant places. [2024-06-04 14:47:40,333 INFO L231 Difference]: Finished difference. Result has 362 places, 457 transitions, 5894 flow [2024-06-04 14:47:40,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5693, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5894, PETRI_PLACES=362, PETRI_TRANSITIONS=457} [2024-06-04 14:47:40,333 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-04 14:47:40,333 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 457 transitions, 5894 flow [2024-06-04 14:47:40,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 14:47:40,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:47:40,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:47:40,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-04 14:47:40,334 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:47:40,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:47:40,334 INFO L85 PathProgramCache]: Analyzing trace with hash -237676793, now seen corresponding path program 2 times [2024-06-04 14:47:40,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:47:40,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999066475] [2024-06-04 14:47:40,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:47:40,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:47:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:47:42,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:47:42,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:47:42,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999066475] [2024-06-04 14:47:42,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999066475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:47:42,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:47:42,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:47:42,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717353097] [2024-06-04 14:47:42,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:47:42,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:47:42,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:47:42,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:47:42,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:47:42,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:47:42,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 457 transitions, 5894 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 14:47:42,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:47:42,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:47:42,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:47:45,392 INFO L124 PetriNetUnfolderBase]: 5587/8658 cut-off events. [2024-06-04 14:47:45,392 INFO L125 PetriNetUnfolderBase]: For 1982294/1982300 co-relation queries the response was YES. [2024-06-04 14:47:45,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99979 conditions, 8658 events. 5587/8658 cut-off events. For 1982294/1982300 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 52272 event pairs, 1245 based on Foata normal form. 8/8664 useless extension candidates. Maximal degree in co-relation 99812. Up to 8543 conditions per place. [2024-06-04 14:47:45,515 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 453 selfloop transitions, 31 changer transitions 0/487 dead transitions. [2024-06-04 14:47:45,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 487 transitions, 7082 flow [2024-06-04 14:47:45,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:47:45,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:47:45,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-04 14:47:45,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-04 14:47:45,516 INFO L175 Difference]: Start difference. First operand has 362 places, 457 transitions, 5894 flow. Second operand 8 states and 127 transitions. [2024-06-04 14:47:45,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 487 transitions, 7082 flow [2024-06-04 14:47:49,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 487 transitions, 6905 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-04 14:47:49,552 INFO L231 Difference]: Finished difference. Result has 365 places, 463 transitions, 5945 flow [2024-06-04 14:47:49,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5717, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5945, PETRI_PLACES=365, PETRI_TRANSITIONS=463} [2024-06-04 14:47:49,553 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 321 predicate places. [2024-06-04 14:47:49,553 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 463 transitions, 5945 flow [2024-06-04 14:47:49,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 14:47:49,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:47:49,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:47:49,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-04 14:47:49,553 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:47:49,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:47:49,554 INFO L85 PathProgramCache]: Analyzing trace with hash 2065576427, now seen corresponding path program 1 times [2024-06-04 14:47:49,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:47:49,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695902674] [2024-06-04 14:47:49,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:47:49,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:47:49,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:47:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:47:52,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:47:52,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695902674] [2024-06-04 14:47:52,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695902674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:47:52,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:47:52,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:47:52,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945187550] [2024-06-04 14:47:52,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:47:52,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:47:52,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:47:52,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:47:52,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:47:52,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:47:52,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 463 transitions, 5945 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:47:52,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:47:52,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:47:52,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:47:55,231 INFO L124 PetriNetUnfolderBase]: 5595/8670 cut-off events. [2024-06-04 14:47:55,231 INFO L125 PetriNetUnfolderBase]: For 2019012/2019018 co-relation queries the response was YES. [2024-06-04 14:47:55,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101248 conditions, 8670 events. 5595/8670 cut-off events. For 2019012/2019018 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 52068 event pairs, 1094 based on Foata normal form. 8/8676 useless extension candidates. Maximal degree in co-relation 101079. Up to 8524 conditions per place. [2024-06-04 14:47:55,360 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 463 selfloop transitions, 27 changer transitions 0/493 dead transitions. [2024-06-04 14:47:55,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 493 transitions, 7099 flow [2024-06-04 14:47:55,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:47:55,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:47:55,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-04 14:47:55,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-04 14:47:55,362 INFO L175 Difference]: Start difference. First operand has 365 places, 463 transitions, 5945 flow. Second operand 8 states and 129 transitions. [2024-06-04 14:47:55,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 493 transitions, 7099 flow [2024-06-04 14:47:59,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 493 transitions, 6925 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-04 14:47:59,175 INFO L231 Difference]: Finished difference. Result has 368 places, 465 transitions, 5920 flow [2024-06-04 14:47:59,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5771, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5920, PETRI_PLACES=368, PETRI_TRANSITIONS=465} [2024-06-04 14:47:59,176 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 324 predicate places. [2024-06-04 14:47:59,176 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 465 transitions, 5920 flow [2024-06-04 14:47:59,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:47:59,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:47:59,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:47:59,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-04 14:47:59,176 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:47:59,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:47:59,176 INFO L85 PathProgramCache]: Analyzing trace with hash 2065845197, now seen corresponding path program 2 times [2024-06-04 14:47:59,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:47:59,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408110291] [2024-06-04 14:47:59,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:47:59,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:47:59,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:01,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:01,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408110291] [2024-06-04 14:48:01,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408110291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:01,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:01,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:48:01,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605177686] [2024-06-04 14:48:01,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:01,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:48:01,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:01,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:48:01,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:48:01,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:48:01,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 465 transitions, 5920 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:01,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:01,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:48:01,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:05,109 INFO L124 PetriNetUnfolderBase]: 5603/8682 cut-off events. [2024-06-04 14:48:05,110 INFO L125 PetriNetUnfolderBase]: For 2047190/2047196 co-relation queries the response was YES. [2024-06-04 14:48:05,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101668 conditions, 8682 events. 5603/8682 cut-off events. For 2047190/2047196 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 52464 event pairs, 1249 based on Foata normal form. 8/8688 useless extension candidates. Maximal degree in co-relation 101498. Up to 8560 conditions per place. [2024-06-04 14:48:05,251 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 458 selfloop transitions, 30 changer transitions 0/491 dead transitions. [2024-06-04 14:48:05,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 491 transitions, 7062 flow [2024-06-04 14:48:05,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:48:05,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:48:05,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-04 14:48:05,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-04 14:48:05,253 INFO L175 Difference]: Start difference. First operand has 368 places, 465 transitions, 5920 flow. Second operand 8 states and 127 transitions. [2024-06-04 14:48:05,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 491 transitions, 7062 flow [2024-06-04 14:48:09,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 491 transitions, 6929 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-04 14:48:09,143 INFO L231 Difference]: Finished difference. Result has 370 places, 467 transitions, 5946 flow [2024-06-04 14:48:09,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5787, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5946, PETRI_PLACES=370, PETRI_TRANSITIONS=467} [2024-06-04 14:48:09,144 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 326 predicate places. [2024-06-04 14:48:09,144 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 467 transitions, 5946 flow [2024-06-04 14:48:09,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:09,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:09,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:09,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-04 14:48:09,144 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:09,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:09,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1915093835, now seen corresponding path program 1 times [2024-06-04 14:48:09,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:09,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355891476] [2024-06-04 14:48:09,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:09,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:11,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:11,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:11,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355891476] [2024-06-04 14:48:11,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355891476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:11,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:11,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:48:11,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275790780] [2024-06-04 14:48:11,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:11,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:48:11,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:11,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:48:11,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:48:11,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-04 14:48:11,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 467 transitions, 5946 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:11,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:11,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-04 14:48:11,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand