./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix042.opt.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/mix042.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix042.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix042.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 16:22:53,444 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:22:53,512 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:22:53,515 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:22:53,516 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:22:53,540 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:22:53,540 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:22:53,540 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:22:53,541 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:22:53,544 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:22:53,544 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:22:53,544 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:22:53,545 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:22:53,546 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:22:53,546 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:22:53,546 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:22:53,546 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:22:53,547 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:22:53,547 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:22:53,547 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:22:53,547 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:22:53,547 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:22:53,548 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:22:53,548 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:22:53,548 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:22:53,548 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:22:53,548 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:22:53,549 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:22:53,549 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:22:53,549 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:22:53,550 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:22:53,550 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:22:53,550 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:22:53,550 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:22:53,551 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:22:53,551 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:22:53,551 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:22:53,551 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:22:53,551 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:22:53,551 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:22:53,551 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:22:53,552 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:22:53,552 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:22:53,552 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:22:53,768 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:22:53,788 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:22:53,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:22:53,791 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:22:53,792 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:22:53,792 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix042.opt.yml/witness.yml [2024-06-20 16:22:53,974 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:22:53,976 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:22:53,979 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix042.opt.i [2024-06-20 16:22:55,052 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:22:55,245 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:22:55,246 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix042.opt.i [2024-06-20 16:22:55,260 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b69270be1/4fcf2a4a45574fe3933a69ec3c98a986/FLAGf83833cb2 [2024-06-20 16:22:55,270 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b69270be1/4fcf2a4a45574fe3933a69ec3c98a986 [2024-06-20 16:22:55,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:22:55,271 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:22:55,272 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:22:55,272 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:22:55,276 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:22:55,277 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:22:53" (1/2) ... [2024-06-20 16:22:55,277 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a5b0397 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:22:55, skipping insertion in model container [2024-06-20 16:22:55,277 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:22:53" (1/2) ... [2024-06-20 16:22:55,278 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4f0f0ba9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:22:55, skipping insertion in model container [2024-06-20 16:22:55,279 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:22:55" (2/2) ... [2024-06-20 16:22:55,279 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a5b0397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:22:55, skipping insertion in model container [2024-06-20 16:22:55,279 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:22:55" (2/2) ... [2024-06-20 16:22:55,279 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:22:55,345 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:22:55,346 INFO L97 edCorrectnessWitness]: Location invariant before [L830-L830] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2))) [2024-06-20 16:22:55,346 INFO L97 edCorrectnessWitness]: Location invariant before [L831-L831] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2))) [2024-06-20 16:22:55,346 INFO L97 edCorrectnessWitness]: Location invariant before [L828-L828] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2))) [2024-06-20 16:22:55,346 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:22:55,347 INFO L106 edCorrectnessWitness]: ghost_update [L826-L826] multithreaded = 1; [2024-06-20 16:22:55,387 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:22:55,686 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:22:55,704 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:22:55,817 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:22:55,854 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:22:55,854 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:22:55 WrapperNode [2024-06-20 16:22:55,855 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:22:55,855 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:22:55,855 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:22:55,856 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:22:55,861 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:22:55" (1/1) ... [2024-06-20 16:22:55,878 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:22:55" (1/1) ... [2024-06-20 16:22:55,903 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 152 [2024-06-20 16:22:55,904 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:22:55,904 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:22:55,905 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:22:55,905 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:22:55,914 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:22:55" (1/1) ... [2024-06-20 16:22:55,915 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:22:55" (1/1) ... [2024-06-20 16:22:55,917 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:22:55" (1/1) ... [2024-06-20 16:22:55,948 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]. [2024-06-20 16:22:55,948 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:22:55" (1/1) ... [2024-06-20 16:22:55,949 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:22:55" (1/1) ... [2024-06-20 16:22:55,959 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:22:55" (1/1) ... [2024-06-20 16:22:55,979 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:22:55" (1/1) ... [2024-06-20 16:22:55,980 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:22:55" (1/1) ... [2024-06-20 16:22:55,982 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:22:55" (1/1) ... [2024-06-20 16:22:55,984 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:22:55,985 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:22:55,985 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:22:55,985 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:22:55,985 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:22:55" (1/1) ... [2024-06-20 16:22:55,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:22:56,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:22:56,044 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 16:22:56,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 16:22:56,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:22:56,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:22:56,088 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:22:56,088 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:22:56,089 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:22:56,089 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:22:56,089 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:22:56,089 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:22:56,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:22:56,089 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:22:56,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:22:56,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:22:56,091 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:22:56,185 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:22:56,187 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:22:56,597 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:22:56,597 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:22:56,692 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:22:56,692 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:22:56,692 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:22:56 BoogieIcfgContainer [2024-06-20 16:22:56,693 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:22:56,694 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:22:56,694 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:22:56,696 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:22:56,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:22:53" (1/4) ... [2024-06-20 16:22:56,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c9ecbe and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:22:56, skipping insertion in model container [2024-06-20 16:22:56,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:22:55" (2/4) ... [2024-06-20 16:22:56,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c9ecbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:22:56, skipping insertion in model container [2024-06-20 16:22:56,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:22:55" (3/4) ... [2024-06-20 16:22:56,698 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c9ecbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:22:56, skipping insertion in model container [2024-06-20 16:22:56,698 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:22:56" (4/4) ... [2024-06-20 16:22:56,698 INFO L112 eAbstractionObserver]: Analyzing ICFG mix042.opt.i [2024-06-20 16:22:56,710 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:22:56,711 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 16:22:56,711 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:22:56,743 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:22:56,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 16:22:56,785 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-20 16:22:56,785 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:22:56,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 16:22:56,788 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 16:22:56,790 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-20 16:22:56,796 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:22:56,800 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;@10cd0e99, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:22:56,800 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 16:22:56,803 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:22:56,803 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 16:22:56,803 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:22:56,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:56,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:22:56,804 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)] === [2024-06-20 16:22:56,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:56,808 INFO L85 PathProgramCache]: Analyzing trace with hash 371308986, now seen corresponding path program 1 times [2024-06-20 16:22:56,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:56,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902388515] [2024-06-20 16:22:56,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:56,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:56,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:57,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:57,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:57,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902388515] [2024-06-20 16:22:57,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902388515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:57,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:57,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:22:57,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318727477] [2024-06-20 16:22:57,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:57,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:22:57,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:57,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:22:57,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:22:57,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-20 16:22:57,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:57,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:57,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-20 16:22:57,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:58,027 INFO L124 PetriNetUnfolderBase]: 1059/1717 cut-off events. [2024-06-20 16:22:58,028 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-06-20 16:22:58,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3381 conditions, 1717 events. 1059/1717 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8755 event pairs, 698 based on Foata normal form. 1/1664 useless extension candidates. Maximal degree in co-relation 3369. Up to 1593 conditions per place. [2024-06-20 16:22:58,043 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 31 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-20 16:22:58,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 171 flow [2024-06-20 16:22:58,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:22:58,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:22:58,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-06-20 16:22:58,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-20 16:22:58,054 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 77 transitions. [2024-06-20 16:22:58,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 171 flow [2024-06-20 16:22:58,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 16:22:58,059 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-20 16:22:58,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-20 16:22:58,063 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-20 16:22:58,064 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-20 16:22:58,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:58,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:58,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:58,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:22:58,065 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)] === [2024-06-20 16:22:58,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:58,066 INFO L85 PathProgramCache]: Analyzing trace with hash 345675033, now seen corresponding path program 1 times [2024-06-20 16:22:58,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:58,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943204034] [2024-06-20 16:22:58,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:58,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:58,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:58,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943204034] [2024-06-20 16:22:58,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943204034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:58,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:58,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:22:58,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572131014] [2024-06-20 16:22:58,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:58,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:22:58,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:58,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:22:58,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:22:58,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-20 16:22:58,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:58,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:58,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-20 16:22:58,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:59,030 INFO L124 PetriNetUnfolderBase]: 1215/1894 cut-off events. [2024-06-20 16:22:59,030 INFO L125 PetriNetUnfolderBase]: For 378/378 co-relation queries the response was YES. [2024-06-20 16:22:59,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4305 conditions, 1894 events. 1215/1894 cut-off events. For 378/378 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9434 event pairs, 648 based on Foata normal form. 3/1872 useless extension candidates. Maximal degree in co-relation 4293. Up to 1803 conditions per place. [2024-06-20 16:22:59,038 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 39 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-20 16:22:59,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 240 flow [2024-06-20 16:22:59,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:22:59,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:22:59,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-06-20 16:22:59,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2024-06-20 16:22:59,040 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 97 transitions. [2024-06-20 16:22:59,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 240 flow [2024-06-20 16:22:59,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:22:59,041 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-20 16:22:59,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-20 16:22:59,042 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-20 16:22:59,042 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-20 16:22:59,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:59,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:59,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:59,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:22:59,042 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)] === [2024-06-20 16:22:59,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:59,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1325828590, now seen corresponding path program 1 times [2024-06-20 16:22:59,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:59,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288354256] [2024-06-20 16:22:59,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:59,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:59,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:59,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:59,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288354256] [2024-06-20 16:22:59,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288354256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:59,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:59,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:22:59,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544587483] [2024-06-20 16:22:59,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:59,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:22:59,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:59,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:22:59,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:22:59,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 16:22:59,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:59,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:59,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 16:22:59,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:00,177 INFO L124 PetriNetUnfolderBase]: 1545/2373 cut-off events. [2024-06-20 16:23:00,178 INFO L125 PetriNetUnfolderBase]: For 1251/1251 co-relation queries the response was YES. [2024-06-20 16:23:00,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5945 conditions, 2373 events. 1545/2373 cut-off events. For 1251/1251 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11561 event pairs, 575 based on Foata normal form. 6/2348 useless extension candidates. Maximal degree in co-relation 5931. Up to 2233 conditions per place. [2024-06-20 16:23:00,187 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 51 selfloop transitions, 12 changer transitions 0/69 dead transitions. [2024-06-20 16:23:00,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 69 transitions, 352 flow [2024-06-20 16:23:00,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:23:00,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:23:00,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-20 16:23:00,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-20 16:23:00,189 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 132 transitions. [2024-06-20 16:23:00,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 69 transitions, 352 flow [2024-06-20 16:23:00,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 69 transitions, 332 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-20 16:23:00,191 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-20 16:23:00,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-20 16:23:00,191 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-20 16:23:00,192 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-20 16:23:00,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:00,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:00,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:00,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:23:00,192 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:23:00,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:00,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1679440002, now seen corresponding path program 1 times [2024-06-20 16:23:00,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:00,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205789643] [2024-06-20 16:23:00,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:00,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:00,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:00,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:00,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:00,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205789643] [2024-06-20 16:23:00,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205789643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:00,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:00,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:23:00,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006381178] [2024-06-20 16:23:00,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:00,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:23:00,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:00,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:23:00,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:23:00,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 16:23:00,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:00,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:00,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 16:23:00,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:01,342 INFO L124 PetriNetUnfolderBase]: 1333/2129 cut-off events. [2024-06-20 16:23:01,342 INFO L125 PetriNetUnfolderBase]: For 2050/2050 co-relation queries the response was YES. [2024-06-20 16:23:01,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5783 conditions, 2129 events. 1333/2129 cut-off events. For 2050/2050 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10631 event pairs, 592 based on Foata normal form. 2/2100 useless extension candidates. Maximal degree in co-relation 5766. Up to 1980 conditions per place. [2024-06-20 16:23:01,351 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 43 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-20 16:23:01,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 57 transitions, 325 flow [2024-06-20 16:23:01,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:23:01,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:23:01,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2024-06-20 16:23:01,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 16:23:01,353 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 95 transitions. [2024-06-20 16:23:01,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 57 transitions, 325 flow [2024-06-20 16:23:01,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 298 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 16:23:01,356 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-20 16:23:01,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-20 16:23:01,356 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-20 16:23:01,357 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-20 16:23:01,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:01,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:01,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:01,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:23:01,357 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)] === [2024-06-20 16:23:01,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:01,358 INFO L85 PathProgramCache]: Analyzing trace with hash -523030790, now seen corresponding path program 1 times [2024-06-20 16:23:01,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:01,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919140232] [2024-06-20 16:23:01,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:01,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:02,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:02,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:02,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919140232] [2024-06-20 16:23:02,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919140232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:02,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:02,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:23:02,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111739686] [2024-06-20 16:23:02,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:02,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:23:02,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:02,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:23:02,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:23:02,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 16:23:02,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:02,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:02,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 16:23:02,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:02,705 INFO L124 PetriNetUnfolderBase]: 1323/2159 cut-off events. [2024-06-20 16:23:02,705 INFO L125 PetriNetUnfolderBase]: For 3045/3045 co-relation queries the response was YES. [2024-06-20 16:23:02,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6228 conditions, 2159 events. 1323/2159 cut-off events. For 3045/3045 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 11086 event pairs, 556 based on Foata normal form. 4/2154 useless extension candidates. Maximal degree in co-relation 6209. Up to 1948 conditions per place. [2024-06-20 16:23:02,717 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 48 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2024-06-20 16:23:02,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 374 flow [2024-06-20 16:23:02,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:23:02,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:23:02,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-20 16:23:02,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-06-20 16:23:02,719 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 6 states and 113 transitions. [2024-06-20 16:23:02,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 374 flow [2024-06-20 16:23:02,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 65 transitions, 354 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 16:23:02,726 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 232 flow [2024-06-20 16:23:02,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=232, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-06-20 16:23:02,729 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-20 16:23:02,729 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 232 flow [2024-06-20 16:23:02,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:02,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:02,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:02,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:23:02,734 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)] === [2024-06-20 16:23:02,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:02,734 INFO L85 PathProgramCache]: Analyzing trace with hash 983575719, now seen corresponding path program 1 times [2024-06-20 16:23:02,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:02,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507433688] [2024-06-20 16:23:02,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:02,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:02,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:03,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:03,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:03,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507433688] [2024-06-20 16:23:03,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507433688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:03,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:03,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:23:03,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156280342] [2024-06-20 16:23:03,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:03,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:23:03,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:03,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:23:03,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:23:03,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:03,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:03,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:03,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:03,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:04,101 INFO L124 PetriNetUnfolderBase]: 1541/2390 cut-off events. [2024-06-20 16:23:04,101 INFO L125 PetriNetUnfolderBase]: For 5061/5065 co-relation queries the response was YES. [2024-06-20 16:23:04,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7609 conditions, 2390 events. 1541/2390 cut-off events. For 5061/5065 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11702 event pairs, 656 based on Foata normal form. 6/2386 useless extension candidates. Maximal degree in co-relation 7589. Up to 2244 conditions per place. [2024-06-20 16:23:04,113 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 54 selfloop transitions, 16 changer transitions 0/75 dead transitions. [2024-06-20 16:23:04,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 75 transitions, 482 flow [2024-06-20 16:23:04,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:23:04,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:23:04,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-20 16:23:04,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 16:23:04,115 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 232 flow. Second operand 6 states and 114 transitions. [2024-06-20 16:23:04,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 75 transitions, 482 flow [2024-06-20 16:23:04,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 75 transitions, 452 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 16:23:04,118 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 288 flow [2024-06-20 16:23:04,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=288, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-06-20 16:23:04,121 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-20 16:23:04,121 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 288 flow [2024-06-20 16:23:04,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:04,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:04,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:04,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:23:04,122 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)] === [2024-06-20 16:23:04,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:04,122 INFO L85 PathProgramCache]: Analyzing trace with hash 990615819, now seen corresponding path program 2 times [2024-06-20 16:23:04,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:04,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827612013] [2024-06-20 16:23:04,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:04,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:04,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:04,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:04,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:04,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827612013] [2024-06-20 16:23:04,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827612013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:04,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:04,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:23:04,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427367980] [2024-06-20 16:23:04,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:04,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:23:04,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:04,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:23:04,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:23:04,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:04,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 288 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:04,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:04,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:04,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:05,425 INFO L124 PetriNetUnfolderBase]: 1536/2384 cut-off events. [2024-06-20 16:23:05,426 INFO L125 PetriNetUnfolderBase]: For 6787/6791 co-relation queries the response was YES. [2024-06-20 16:23:05,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8106 conditions, 2384 events. 1536/2384 cut-off events. For 6787/6791 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11709 event pairs, 659 based on Foata normal form. 6/2380 useless extension candidates. Maximal degree in co-relation 8085. Up to 2239 conditions per place. [2024-06-20 16:23:05,450 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 49 selfloop transitions, 16 changer transitions 0/70 dead transitions. [2024-06-20 16:23:05,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 70 transitions, 456 flow [2024-06-20 16:23:05,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:23:05,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:23:05,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-20 16:23:05,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-20 16:23:05,452 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 288 flow. Second operand 6 states and 109 transitions. [2024-06-20 16:23:05,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 70 transitions, 456 flow [2024-06-20 16:23:05,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 70 transitions, 422 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-20 16:23:05,459 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 294 flow [2024-06-20 16:23:05,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=294, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-20 16:23:05,460 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-20 16:23:05,460 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 294 flow [2024-06-20 16:23:05,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:05,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:05,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:05,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:23:05,461 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)] === [2024-06-20 16:23:05,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:05,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1652378859, now seen corresponding path program 1 times [2024-06-20 16:23:05,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:05,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275186679] [2024-06-20 16:23:05,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:05,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:05,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:06,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:06,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:06,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275186679] [2024-06-20 16:23:06,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275186679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:06,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:06,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:23:06,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69041480] [2024-06-20 16:23:06,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:06,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:23:06,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:06,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:23:06,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:23:06,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:06,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 294 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:06,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:06,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:06,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:06,941 INFO L124 PetriNetUnfolderBase]: 1583/2462 cut-off events. [2024-06-20 16:23:06,942 INFO L125 PetriNetUnfolderBase]: For 8075/8077 co-relation queries the response was YES. [2024-06-20 16:23:06,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8510 conditions, 2462 events. 1583/2462 cut-off events. For 8075/8077 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12121 event pairs, 652 based on Foata normal form. 4/2456 useless extension candidates. Maximal degree in co-relation 8487. Up to 2291 conditions per place. [2024-06-20 16:23:06,953 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 66 selfloop transitions, 24 changer transitions 0/95 dead transitions. [2024-06-20 16:23:06,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 95 transitions, 628 flow [2024-06-20 16:23:06,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:06,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:06,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 16:23:06,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-20 16:23:06,957 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 294 flow. Second operand 8 states and 146 transitions. [2024-06-20 16:23:06,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 95 transitions, 628 flow [2024-06-20 16:23:06,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 95 transitions, 572 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 16:23:06,964 INFO L231 Difference]: Finished difference. Result has 65 places, 69 transitions, 406 flow [2024-06-20 16:23:06,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=406, PETRI_PLACES=65, PETRI_TRANSITIONS=69} [2024-06-20 16:23:06,966 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 22 predicate places. [2024-06-20 16:23:06,966 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 69 transitions, 406 flow [2024-06-20 16:23:06,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:06,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:06,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:06,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:23:06,967 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)] === [2024-06-20 16:23:06,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:06,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1154758549, now seen corresponding path program 2 times [2024-06-20 16:23:06,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:06,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850277047] [2024-06-20 16:23:06,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:06,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:07,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:07,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:07,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850277047] [2024-06-20 16:23:07,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850277047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:07,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:07,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:23:07,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875312550] [2024-06-20 16:23:07,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:07,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:23:07,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:07,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:23:07,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:23:07,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:07,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 69 transitions, 406 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:07,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:07,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:07,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:08,496 INFO L124 PetriNetUnfolderBase]: 1594/2482 cut-off events. [2024-06-20 16:23:08,496 INFO L125 PetriNetUnfolderBase]: For 10452/10456 co-relation queries the response was YES. [2024-06-20 16:23:08,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9215 conditions, 2482 events. 1594/2482 cut-off events. For 10452/10456 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12212 event pairs, 631 based on Foata normal form. 6/2477 useless extension candidates. Maximal degree in co-relation 9190. Up to 2293 conditions per place. [2024-06-20 16:23:08,509 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 66 selfloop transitions, 26 changer transitions 0/97 dead transitions. [2024-06-20 16:23:08,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 97 transitions, 702 flow [2024-06-20 16:23:08,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:23:08,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:23:08,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-20 16:23:08,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-20 16:23:08,511 INFO L175 Difference]: Start difference. First operand has 65 places, 69 transitions, 406 flow. Second operand 7 states and 129 transitions. [2024-06-20 16:23:08,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 97 transitions, 702 flow [2024-06-20 16:23:08,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 97 transitions, 660 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-20 16:23:08,518 INFO L231 Difference]: Finished difference. Result has 69 places, 72 transitions, 465 flow [2024-06-20 16:23:08,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=465, PETRI_PLACES=69, PETRI_TRANSITIONS=72} [2024-06-20 16:23:08,518 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-20 16:23:08,519 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 72 transitions, 465 flow [2024-06-20 16:23:08,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:08,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:08,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:08,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:23:08,519 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)] === [2024-06-20 16:23:08,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:08,520 INFO L85 PathProgramCache]: Analyzing trace with hash -128034663, now seen corresponding path program 1 times [2024-06-20 16:23:08,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:08,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779369697] [2024-06-20 16:23:08,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:08,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:08,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:09,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:09,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:09,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779369697] [2024-06-20 16:23:09,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779369697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:09,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:09,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:23:09,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378699483] [2024-06-20 16:23:09,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:09,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:23:09,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:09,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:23:09,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:23:09,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:09,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 72 transitions, 465 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:09,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:09,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:09,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:09,998 INFO L124 PetriNetUnfolderBase]: 1616/2514 cut-off events. [2024-06-20 16:23:09,998 INFO L125 PetriNetUnfolderBase]: For 13683/13687 co-relation queries the response was YES. [2024-06-20 16:23:10,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9908 conditions, 2514 events. 1616/2514 cut-off events. For 13683/13687 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12325 event pairs, 583 based on Foata normal form. 8/2508 useless extension candidates. Maximal degree in co-relation 9882. Up to 2277 conditions per place. [2024-06-20 16:23:10,039 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 75 selfloop transitions, 26 changer transitions 0/106 dead transitions. [2024-06-20 16:23:10,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 106 transitions, 841 flow [2024-06-20 16:23:10,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:23:10,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:23:10,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-20 16:23:10,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-20 16:23:10,041 INFO L175 Difference]: Start difference. First operand has 69 places, 72 transitions, 465 flow. Second operand 7 states and 135 transitions. [2024-06-20 16:23:10,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 106 transitions, 841 flow [2024-06-20 16:23:10,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 106 transitions, 762 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 16:23:10,054 INFO L231 Difference]: Finished difference. Result has 71 places, 78 transitions, 508 flow [2024-06-20 16:23:10,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=508, PETRI_PLACES=71, PETRI_TRANSITIONS=78} [2024-06-20 16:23:10,056 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-20 16:23:10,056 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 78 transitions, 508 flow [2024-06-20 16:23:10,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:10,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:10,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:10,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:23:10,057 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)] === [2024-06-20 16:23:10,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:10,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1154638579, now seen corresponding path program 3 times [2024-06-20 16:23:10,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:10,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785083644] [2024-06-20 16:23:10,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:10,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:10,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:10,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:10,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785083644] [2024-06-20 16:23:10,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785083644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:10,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:10,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:23:10,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561588104] [2024-06-20 16:23:10,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:10,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:23:10,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:10,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:23:10,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:23:10,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:10,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 78 transitions, 508 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:10,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:10,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:10,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:11,572 INFO L124 PetriNetUnfolderBase]: 1627/2532 cut-off events. [2024-06-20 16:23:11,572 INFO L125 PetriNetUnfolderBase]: For 13544/13548 co-relation queries the response was YES. [2024-06-20 16:23:11,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9984 conditions, 2532 events. 1627/2532 cut-off events. For 13544/13548 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12503 event pairs, 617 based on Foata normal form. 4/2523 useless extension candidates. Maximal degree in co-relation 9957. Up to 2289 conditions per place. [2024-06-20 16:23:11,585 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 65 selfloop transitions, 37 changer transitions 0/107 dead transitions. [2024-06-20 16:23:11,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 107 transitions, 880 flow [2024-06-20 16:23:11,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:23:11,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:23:11,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-20 16:23:11,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-20 16:23:11,587 INFO L175 Difference]: Start difference. First operand has 71 places, 78 transitions, 508 flow. Second operand 7 states and 132 transitions. [2024-06-20 16:23:11,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 107 transitions, 880 flow [2024-06-20 16:23:11,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 107 transitions, 847 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-20 16:23:11,596 INFO L231 Difference]: Finished difference. Result has 75 places, 84 transitions, 627 flow [2024-06-20 16:23:11,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=627, PETRI_PLACES=75, PETRI_TRANSITIONS=84} [2024-06-20 16:23:11,597 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-20 16:23:11,597 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 84 transitions, 627 flow [2024-06-20 16:23:11,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:11,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:11,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:11,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:23:11,598 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)] === [2024-06-20 16:23:11,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:11,598 INFO L85 PathProgramCache]: Analyzing trace with hash 626446437, now seen corresponding path program 2 times [2024-06-20 16:23:11,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:11,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523432708] [2024-06-20 16:23:11,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:11,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:11,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:12,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:12,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523432708] [2024-06-20 16:23:12,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523432708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:12,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:12,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:23:12,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572163901] [2024-06-20 16:23:12,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:12,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:23:12,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:12,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:23:12,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:23:12,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:12,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 84 transitions, 627 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:12,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:12,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:12,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:13,093 INFO L124 PetriNetUnfolderBase]: 1649/2567 cut-off events. [2024-06-20 16:23:13,094 INFO L125 PetriNetUnfolderBase]: For 17066/17074 co-relation queries the response was YES. [2024-06-20 16:23:13,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10745 conditions, 2567 events. 1649/2567 cut-off events. For 17066/17074 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12685 event pairs, 576 based on Foata normal form. 12/2566 useless extension candidates. Maximal degree in co-relation 10716. Up to 2312 conditions per place. [2024-06-20 16:23:13,106 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 79 selfloop transitions, 29 changer transitions 0/113 dead transitions. [2024-06-20 16:23:13,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 113 transitions, 993 flow [2024-06-20 16:23:13,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:23:13,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:23:13,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-20 16:23:13,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-20 16:23:13,108 INFO L175 Difference]: Start difference. First operand has 75 places, 84 transitions, 627 flow. Second operand 7 states and 132 transitions. [2024-06-20 16:23:13,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 113 transitions, 993 flow [2024-06-20 16:23:13,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 113 transitions, 945 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-20 16:23:13,119 INFO L231 Difference]: Finished difference. Result has 79 places, 87 transitions, 675 flow [2024-06-20 16:23:13,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=675, PETRI_PLACES=79, PETRI_TRANSITIONS=87} [2024-06-20 16:23:13,120 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-20 16:23:13,120 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 87 transitions, 675 flow [2024-06-20 16:23:13,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:13,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:13,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:13,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:23:13,122 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)] === [2024-06-20 16:23:13,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:13,122 INFO L85 PathProgramCache]: Analyzing trace with hash -977507059, now seen corresponding path program 4 times [2024-06-20 16:23:13,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:13,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282008706] [2024-06-20 16:23:13,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:13,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:13,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:13,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:13,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:13,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282008706] [2024-06-20 16:23:13,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282008706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:13,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:13,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:23:13,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597567938] [2024-06-20 16:23:13,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:13,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:23:13,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:13,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:23:13,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:23:14,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:14,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 87 transitions, 675 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:14,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:14,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:14,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:14,623 INFO L124 PetriNetUnfolderBase]: 1644/2557 cut-off events. [2024-06-20 16:23:14,623 INFO L125 PetriNetUnfolderBase]: For 19429/19433 co-relation queries the response was YES. [2024-06-20 16:23:14,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11005 conditions, 2557 events. 1644/2557 cut-off events. For 19429/19433 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12595 event pairs, 628 based on Foata normal form. 2/2545 useless extension candidates. Maximal degree in co-relation 10974. Up to 2316 conditions per place. [2024-06-20 16:23:14,635 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 64 selfloop transitions, 37 changer transitions 0/106 dead transitions. [2024-06-20 16:23:14,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 106 transitions, 935 flow [2024-06-20 16:23:14,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:23:14,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:23:14,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-20 16:23:14,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-20 16:23:14,637 INFO L175 Difference]: Start difference. First operand has 79 places, 87 transitions, 675 flow. Second operand 7 states and 127 transitions. [2024-06-20 16:23:14,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 106 transitions, 935 flow [2024-06-20 16:23:14,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 106 transitions, 838 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 16:23:14,653 INFO L231 Difference]: Finished difference. Result has 81 places, 87 transitions, 660 flow [2024-06-20 16:23:14,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=660, PETRI_PLACES=81, PETRI_TRANSITIONS=87} [2024-06-20 16:23:14,654 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2024-06-20 16:23:14,654 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 87 transitions, 660 flow [2024-06-20 16:23:14,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:14,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:14,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:14,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:23:14,654 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)] === [2024-06-20 16:23:14,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:14,655 INFO L85 PathProgramCache]: Analyzing trace with hash -121368423, now seen corresponding path program 3 times [2024-06-20 16:23:14,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:14,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235591299] [2024-06-20 16:23:14,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:14,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:15,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:15,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:15,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235591299] [2024-06-20 16:23:15,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235591299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:15,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:15,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:23:15,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000000357] [2024-06-20 16:23:15,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:15,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:23:15,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:15,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:23:15,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:23:15,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:15,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 87 transitions, 660 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:15,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:15,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:15,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:16,146 INFO L124 PetriNetUnfolderBase]: 1634/2546 cut-off events. [2024-06-20 16:23:16,146 INFO L125 PetriNetUnfolderBase]: For 21356/21364 co-relation queries the response was YES. [2024-06-20 16:23:16,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11062 conditions, 2546 events. 1634/2546 cut-off events. For 21356/21364 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12574 event pairs, 576 based on Foata normal form. 12/2545 useless extension candidates. Maximal degree in co-relation 11030. Up to 2297 conditions per place. [2024-06-20 16:23:16,157 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 75 selfloop transitions, 30 changer transitions 0/110 dead transitions. [2024-06-20 16:23:16,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 110 transitions, 944 flow [2024-06-20 16:23:16,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:23:16,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:23:16,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 16:23:16,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-20 16:23:16,158 INFO L175 Difference]: Start difference. First operand has 81 places, 87 transitions, 660 flow. Second operand 7 states and 128 transitions. [2024-06-20 16:23:16,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 110 transitions, 944 flow [2024-06-20 16:23:16,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 110 transitions, 830 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-20 16:23:16,179 INFO L231 Difference]: Finished difference. Result has 82 places, 87 transitions, 614 flow [2024-06-20 16:23:16,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=614, PETRI_PLACES=82, PETRI_TRANSITIONS=87} [2024-06-20 16:23:16,179 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-20 16:23:16,180 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 87 transitions, 614 flow [2024-06-20 16:23:16,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:16,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:16,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:16,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:23:16,181 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)] === [2024-06-20 16:23:16,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:16,181 INFO L85 PathProgramCache]: Analyzing trace with hash -977260795, now seen corresponding path program 1 times [2024-06-20 16:23:16,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:16,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741755] [2024-06-20 16:23:16,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:16,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:17,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:17,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:17,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741755] [2024-06-20 16:23:17,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:17,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:17,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:17,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965920817] [2024-06-20 16:23:17,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:17,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:17,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:17,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:17,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:17,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 16:23:17,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 87 transitions, 614 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:17,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:17,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 16:23:17,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:18,000 INFO L124 PetriNetUnfolderBase]: 1419/2308 cut-off events. [2024-06-20 16:23:18,001 INFO L125 PetriNetUnfolderBase]: For 20047/20049 co-relation queries the response was YES. [2024-06-20 16:23:18,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9948 conditions, 2308 events. 1419/2308 cut-off events. For 20047/20049 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 11786 event pairs, 487 based on Foata normal form. 4/2297 useless extension candidates. Maximal degree in co-relation 9915. Up to 2072 conditions per place. [2024-06-20 16:23:18,013 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 91 selfloop transitions, 13 changer transitions 0/110 dead transitions. [2024-06-20 16:23:18,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 110 transitions, 912 flow [2024-06-20 16:23:18,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:23:18,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:23:18,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 16:23:18,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-20 16:23:18,015 INFO L175 Difference]: Start difference. First operand has 82 places, 87 transitions, 614 flow. Second operand 7 states and 130 transitions. [2024-06-20 16:23:18,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 110 transitions, 912 flow [2024-06-20 16:23:18,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 110 transitions, 844 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 16:23:18,027 INFO L231 Difference]: Finished difference. Result has 83 places, 89 transitions, 611 flow [2024-06-20 16:23:18,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=611, PETRI_PLACES=83, PETRI_TRANSITIONS=89} [2024-06-20 16:23:18,027 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-06-20 16:23:18,028 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 89 transitions, 611 flow [2024-06-20 16:23:18,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:18,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:18,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:18,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:23:18,028 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)] === [2024-06-20 16:23:18,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:18,029 INFO L85 PathProgramCache]: Analyzing trace with hash 2131995992, now seen corresponding path program 1 times [2024-06-20 16:23:18,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:18,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207882792] [2024-06-20 16:23:18,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:18,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:18,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:18,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:18,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:18,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207882792] [2024-06-20 16:23:18,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207882792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:18,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:18,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:23:18,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218836424] [2024-06-20 16:23:18,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:18,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:23:18,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:18,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:23:18,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:23:18,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 16:23:18,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 89 transitions, 611 flow. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 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) [2024-06-20 16:23:18,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:18,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 16:23:18,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:19,147 INFO L124 PetriNetUnfolderBase]: 1298/2180 cut-off events. [2024-06-20 16:23:19,147 INFO L125 PetriNetUnfolderBase]: For 21928/21938 co-relation queries the response was YES. [2024-06-20 16:23:19,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9618 conditions, 2180 events. 1298/2180 cut-off events. For 21928/21938 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 11578 event pairs, 517 based on Foata normal form. 9/2172 useless extension candidates. Maximal degree in co-relation 9584. Up to 1934 conditions per place. [2024-06-20 16:23:19,157 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 78 selfloop transitions, 8 changer transitions 0/100 dead transitions. [2024-06-20 16:23:19,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 100 transitions, 827 flow [2024-06-20 16:23:19,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:23:19,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:23:19,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2024-06-20 16:23:19,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 16:23:19,159 INFO L175 Difference]: Start difference. First operand has 83 places, 89 transitions, 611 flow. Second operand 5 states and 95 transitions. [2024-06-20 16:23:19,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 100 transitions, 827 flow [2024-06-20 16:23:19,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 100 transitions, 780 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 16:23:19,173 INFO L231 Difference]: Finished difference. Result has 83 places, 92 transitions, 612 flow [2024-06-20 16:23:19,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=612, PETRI_PLACES=83, PETRI_TRANSITIONS=92} [2024-06-20 16:23:19,173 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-06-20 16:23:19,173 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 92 transitions, 612 flow [2024-06-20 16:23:19,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 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) [2024-06-20 16:23:19,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:19,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:19,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:23:19,174 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)] === [2024-06-20 16:23:19,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:19,174 INFO L85 PathProgramCache]: Analyzing trace with hash 323365963, now seen corresponding path program 1 times [2024-06-20 16:23:19,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:19,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972073976] [2024-06-20 16:23:19,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:19,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:19,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:20,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:20,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972073976] [2024-06-20 16:23:20,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972073976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:20,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:20,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:20,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71222828] [2024-06-20 16:23:20,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:20,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:20,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:20,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:20,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:20,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:20,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 92 transitions, 612 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 16:23:20,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:20,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:20,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:20,740 INFO L124 PetriNetUnfolderBase]: 1645/2564 cut-off events. [2024-06-20 16:23:20,741 INFO L125 PetriNetUnfolderBase]: For 29524/29528 co-relation queries the response was YES. [2024-06-20 16:23:20,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11926 conditions, 2564 events. 1645/2564 cut-off events. For 29524/29528 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12575 event pairs, 600 based on Foata normal form. 8/2571 useless extension candidates. Maximal degree in co-relation 11891. Up to 2345 conditions per place. [2024-06-20 16:23:20,753 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 91 selfloop transitions, 29 changer transitions 0/125 dead transitions. [2024-06-20 16:23:20,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 125 transitions, 984 flow [2024-06-20 16:23:20,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:20,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:20,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 16:23:20,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-20 16:23:20,754 INFO L175 Difference]: Start difference. First operand has 83 places, 92 transitions, 612 flow. Second operand 8 states and 146 transitions. [2024-06-20 16:23:20,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 125 transitions, 984 flow [2024-06-20 16:23:20,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 125 transitions, 958 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 16:23:20,771 INFO L231 Difference]: Finished difference. Result has 88 places, 95 transitions, 695 flow [2024-06-20 16:23:20,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=695, PETRI_PLACES=88, PETRI_TRANSITIONS=95} [2024-06-20 16:23:20,771 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-20 16:23:20,771 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 95 transitions, 695 flow [2024-06-20 16:23:20,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 16:23:20,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:20,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:20,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:23:20,772 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)] === [2024-06-20 16:23:20,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:20,772 INFO L85 PathProgramCache]: Analyzing trace with hash 676216959, now seen corresponding path program 2 times [2024-06-20 16:23:20,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:20,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983677335] [2024-06-20 16:23:20,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:20,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:20,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:21,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:21,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983677335] [2024-06-20 16:23:21,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983677335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:21,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:21,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:21,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141401106] [2024-06-20 16:23:21,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:21,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:21,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:21,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:21,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:21,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:21,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 95 transitions, 695 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 16:23:21,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:21,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:21,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:22,508 INFO L124 PetriNetUnfolderBase]: 1699/2654 cut-off events. [2024-06-20 16:23:22,508 INFO L125 PetriNetUnfolderBase]: For 34880/34882 co-relation queries the response was YES. [2024-06-20 16:23:22,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13030 conditions, 2654 events. 1699/2654 cut-off events. For 34880/34882 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13161 event pairs, 542 based on Foata normal form. 4/2656 useless extension candidates. Maximal degree in co-relation 12994. Up to 2205 conditions per place. [2024-06-20 16:23:22,520 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 77 selfloop transitions, 55 changer transitions 0/137 dead transitions. [2024-06-20 16:23:22,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 137 transitions, 1301 flow [2024-06-20 16:23:22,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:22,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:22,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-20 16:23:22,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-20 16:23:22,531 INFO L175 Difference]: Start difference. First operand has 88 places, 95 transitions, 695 flow. Second operand 8 states and 157 transitions. [2024-06-20 16:23:22,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 137 transitions, 1301 flow [2024-06-20 16:23:22,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 137 transitions, 1218 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 16:23:22,553 INFO L231 Difference]: Finished difference. Result has 90 places, 104 transitions, 862 flow [2024-06-20 16:23:22,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=862, PETRI_PLACES=90, PETRI_TRANSITIONS=104} [2024-06-20 16:23:22,554 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-20 16:23:22,554 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 104 transitions, 862 flow [2024-06-20 16:23:22,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 16:23:22,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:22,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:22,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:23:22,555 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)] === [2024-06-20 16:23:22,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:22,555 INFO L85 PathProgramCache]: Analyzing trace with hash 325888697, now seen corresponding path program 3 times [2024-06-20 16:23:22,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:22,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209584439] [2024-06-20 16:23:22,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:22,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:22,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:23,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:23,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:23,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209584439] [2024-06-20 16:23:23,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209584439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:23,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:23,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:23,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586447322] [2024-06-20 16:23:23,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:23,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:23,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:23,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:23,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:23,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:23,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 104 transitions, 862 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 16:23:23,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:23,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:23,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:24,184 INFO L124 PetriNetUnfolderBase]: 1689/2630 cut-off events. [2024-06-20 16:23:24,184 INFO L125 PetriNetUnfolderBase]: For 39394/39396 co-relation queries the response was YES. [2024-06-20 16:23:24,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13452 conditions, 2630 events. 1689/2630 cut-off events. For 39394/39396 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12924 event pairs, 542 based on Foata normal form. 4/2632 useless extension candidates. Maximal degree in co-relation 13415. Up to 2197 conditions per place. [2024-06-20 16:23:24,198 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 78 selfloop transitions, 53 changer transitions 0/136 dead transitions. [2024-06-20 16:23:24,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 136 transitions, 1280 flow [2024-06-20 16:23:24,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:24,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:24,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-20 16:23:24,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-20 16:23:24,200 INFO L175 Difference]: Start difference. First operand has 90 places, 104 transitions, 862 flow. Second operand 8 states and 157 transitions. [2024-06-20 16:23:24,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 136 transitions, 1280 flow [2024-06-20 16:23:24,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 136 transitions, 1192 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-20 16:23:24,234 INFO L231 Difference]: Finished difference. Result has 95 places, 104 transitions, 888 flow [2024-06-20 16:23:24,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=888, PETRI_PLACES=95, PETRI_TRANSITIONS=104} [2024-06-20 16:23:24,235 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-20 16:23:24,235 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 104 transitions, 888 flow [2024-06-20 16:23:24,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 16:23:24,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:24,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:24,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:23:24,235 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)] === [2024-06-20 16:23:24,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:24,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1870912077, now seen corresponding path program 4 times [2024-06-20 16:23:24,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:24,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817071017] [2024-06-20 16:23:24,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:24,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:25,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:25,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:25,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817071017] [2024-06-20 16:23:25,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817071017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:25,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:25,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:25,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525042493] [2024-06-20 16:23:25,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:25,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:25,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:25,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:25,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:25,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:25,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 104 transitions, 888 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 16:23:25,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:25,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:25,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:25,754 INFO L124 PetriNetUnfolderBase]: 1711/2671 cut-off events. [2024-06-20 16:23:25,755 INFO L125 PetriNetUnfolderBase]: For 43520/43524 co-relation queries the response was YES. [2024-06-20 16:23:25,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13959 conditions, 2671 events. 1711/2671 cut-off events. For 43520/43524 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13206 event pairs, 543 based on Foata normal form. 4/2673 useless extension candidates. Maximal degree in co-relation 13920. Up to 2216 conditions per place. [2024-06-20 16:23:25,768 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 74 selfloop transitions, 57 changer transitions 0/136 dead transitions. [2024-06-20 16:23:25,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 136 transitions, 1356 flow [2024-06-20 16:23:25,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:25,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:25,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 16:23:25,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 16:23:25,770 INFO L175 Difference]: Start difference. First operand has 95 places, 104 transitions, 888 flow. Second operand 8 states and 152 transitions. [2024-06-20 16:23:25,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 136 transitions, 1356 flow [2024-06-20 16:23:25,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 136 transitions, 1225 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 16:23:25,794 INFO L231 Difference]: Finished difference. Result has 96 places, 107 transitions, 933 flow [2024-06-20 16:23:25,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=933, PETRI_PLACES=96, PETRI_TRANSITIONS=107} [2024-06-20 16:23:25,795 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-20 16:23:25,795 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 107 transitions, 933 flow [2024-06-20 16:23:25,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 16:23:25,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:25,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:25,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:23:25,796 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)] === [2024-06-20 16:23:25,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:25,796 INFO L85 PathProgramCache]: Analyzing trace with hash -237940457, now seen corresponding path program 5 times [2024-06-20 16:23:25,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:25,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970206982] [2024-06-20 16:23:25,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:25,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:25,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:26,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:26,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:26,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970206982] [2024-06-20 16:23:26,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970206982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:26,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:26,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:26,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523481670] [2024-06-20 16:23:26,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:26,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:26,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:26,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:26,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:26,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:26,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 107 transitions, 933 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 16:23:26,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:26,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:26,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:27,447 INFO L124 PetriNetUnfolderBase]: 1733/2713 cut-off events. [2024-06-20 16:23:27,448 INFO L125 PetriNetUnfolderBase]: For 47604/47608 co-relation queries the response was YES. [2024-06-20 16:23:27,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14371 conditions, 2713 events. 1733/2713 cut-off events. For 47604/47608 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13459 event pairs, 543 based on Foata normal form. 4/2715 useless extension candidates. Maximal degree in co-relation 14331. Up to 2235 conditions per place. [2024-06-20 16:23:27,463 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 75 selfloop transitions, 59 changer transitions 0/139 dead transitions. [2024-06-20 16:23:27,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 139 transitions, 1411 flow [2024-06-20 16:23:27,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:27,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:27,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-20 16:23:27,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-20 16:23:27,464 INFO L175 Difference]: Start difference. First operand has 96 places, 107 transitions, 933 flow. Second operand 8 states and 153 transitions. [2024-06-20 16:23:27,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 139 transitions, 1411 flow [2024-06-20 16:23:27,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 139 transitions, 1227 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 16:23:27,492 INFO L231 Difference]: Finished difference. Result has 98 places, 110 transitions, 929 flow [2024-06-20 16:23:27,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=929, PETRI_PLACES=98, PETRI_TRANSITIONS=110} [2024-06-20 16:23:27,492 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-20 16:23:27,493 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 110 transitions, 929 flow [2024-06-20 16:23:27,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 16:23:27,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:27,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:27,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:23:27,493 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)] === [2024-06-20 16:23:27,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:27,494 INFO L85 PathProgramCache]: Analyzing trace with hash 532547717, now seen corresponding path program 6 times [2024-06-20 16:23:27,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:27,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196172622] [2024-06-20 16:23:27,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:27,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:28,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:28,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:28,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196172622] [2024-06-20 16:23:28,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196172622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:28,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:28,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:28,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544182051] [2024-06-20 16:23:28,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:28,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:28,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:28,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:28,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:28,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:28,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 110 transitions, 929 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 16:23:28,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:28,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:28,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:28,814 INFO L124 PetriNetUnfolderBase]: 1723/2699 cut-off events. [2024-06-20 16:23:28,814 INFO L125 PetriNetUnfolderBase]: For 50003/50007 co-relation queries the response was YES. [2024-06-20 16:23:28,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14308 conditions, 2699 events. 1723/2699 cut-off events. For 50003/50007 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13355 event pairs, 548 based on Foata normal form. 4/2701 useless extension candidates. Maximal degree in co-relation 14267. Up to 2227 conditions per place. [2024-06-20 16:23:28,829 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 68 selfloop transitions, 63 changer transitions 0/136 dead transitions. [2024-06-20 16:23:28,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 136 transitions, 1267 flow [2024-06-20 16:23:28,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:28,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:28,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 16:23:28,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-20 16:23:28,831 INFO L175 Difference]: Start difference. First operand has 98 places, 110 transitions, 929 flow. Second operand 8 states and 148 transitions. [2024-06-20 16:23:28,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 136 transitions, 1267 flow [2024-06-20 16:23:28,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 136 transitions, 1109 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-20 16:23:28,862 INFO L231 Difference]: Finished difference. Result has 101 places, 110 transitions, 905 flow [2024-06-20 16:23:28,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=905, PETRI_PLACES=101, PETRI_TRANSITIONS=110} [2024-06-20 16:23:28,862 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-20 16:23:28,862 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 110 transitions, 905 flow [2024-06-20 16:23:28,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 16:23:28,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:28,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:28,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:23:28,863 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:23:28,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:28,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1667367378, now seen corresponding path program 1 times [2024-06-20 16:23:28,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:28,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819754946] [2024-06-20 16:23:28,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:28,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:28,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:29,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:29,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:29,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819754946] [2024-06-20 16:23:29,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819754946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:29,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:29,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:23:29,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751809078] [2024-06-20 16:23:29,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:29,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:23:29,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:29,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:23:29,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:23:29,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 16:23:29,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 110 transitions, 905 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:29,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:29,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 16:23:29,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:30,105 INFO L124 PetriNetUnfolderBase]: 1560/2514 cut-off events. [2024-06-20 16:23:30,105 INFO L125 PetriNetUnfolderBase]: For 52638/52663 co-relation queries the response was YES. [2024-06-20 16:23:30,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13656 conditions, 2514 events. 1560/2514 cut-off events. For 52638/52663 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 12943 event pairs, 585 based on Foata normal form. 9/2499 useless extension candidates. Maximal degree in co-relation 13614. Up to 2313 conditions per place. [2024-06-20 16:23:30,118 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 98 selfloop transitions, 11 changer transitions 0/122 dead transitions. [2024-06-20 16:23:30,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 122 transitions, 1173 flow [2024-06-20 16:23:30,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:23:30,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:23:30,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-20 16:23:30,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 16:23:30,121 INFO L175 Difference]: Start difference. First operand has 101 places, 110 transitions, 905 flow. Second operand 6 states and 105 transitions. [2024-06-20 16:23:30,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 122 transitions, 1173 flow [2024-06-20 16:23:30,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 122 transitions, 1023 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 16:23:30,151 INFO L231 Difference]: Finished difference. Result has 99 places, 113 transitions, 813 flow [2024-06-20 16:23:30,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=813, PETRI_PLACES=99, PETRI_TRANSITIONS=113} [2024-06-20 16:23:30,152 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-20 16:23:30,152 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 113 transitions, 813 flow [2024-06-20 16:23:30,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:30,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:30,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:30,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:23:30,153 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)] === [2024-06-20 16:23:30,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:30,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1624210070, now seen corresponding path program 1 times [2024-06-20 16:23:30,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:30,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75628585] [2024-06-20 16:23:30,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:30,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:30,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:31,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:31,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:31,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75628585] [2024-06-20 16:23:31,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75628585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:31,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:31,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:31,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746686607] [2024-06-20 16:23:31,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:31,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:31,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:31,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:31,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:31,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:31,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 113 transitions, 813 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 16:23:31,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:31,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:31,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:31,722 INFO L124 PetriNetUnfolderBase]: 1825/2841 cut-off events. [2024-06-20 16:23:31,722 INFO L125 PetriNetUnfolderBase]: For 67524/67528 co-relation queries the response was YES. [2024-06-20 16:23:31,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15969 conditions, 2841 events. 1825/2841 cut-off events. For 67524/67528 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 14258 event pairs, 446 based on Foata normal form. 8/2848 useless extension candidates. Maximal degree in co-relation 15926. Up to 2514 conditions per place. [2024-06-20 16:23:31,742 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 116 selfloop transitions, 32 changer transitions 0/154 dead transitions. [2024-06-20 16:23:31,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 154 transitions, 1379 flow [2024-06-20 16:23:31,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:23:31,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:23:31,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 16:23:31,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-20 16:23:31,744 INFO L175 Difference]: Start difference. First operand has 99 places, 113 transitions, 813 flow. Second operand 9 states and 164 transitions. [2024-06-20 16:23:31,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 154 transitions, 1379 flow [2024-06-20 16:23:31,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 154 transitions, 1343 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 16:23:31,785 INFO L231 Difference]: Finished difference. Result has 104 places, 117 transitions, 924 flow [2024-06-20 16:23:31,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=924, PETRI_PLACES=104, PETRI_TRANSITIONS=117} [2024-06-20 16:23:31,786 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-20 16:23:31,786 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 117 transitions, 924 flow [2024-06-20 16:23:31,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 16:23:31,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:31,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:31,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:23:31,787 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:23:31,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:31,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1621353110, now seen corresponding path program 2 times [2024-06-20 16:23:31,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:31,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220832819] [2024-06-20 16:23:31,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:31,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:31,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:32,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:32,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220832819] [2024-06-20 16:23:32,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220832819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:32,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:32,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:32,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854215331] [2024-06-20 16:23:32,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:32,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:32,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:32,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:32,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:32,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:32,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 117 transitions, 924 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 16:23:32,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:32,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:32,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:33,488 INFO L124 PetriNetUnfolderBase]: 1817/2829 cut-off events. [2024-06-20 16:23:33,488 INFO L125 PetriNetUnfolderBase]: For 72873/72877 co-relation queries the response was YES. [2024-06-20 16:23:33,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16325 conditions, 2829 events. 1817/2829 cut-off events. For 72873/72877 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 14176 event pairs, 585 based on Foata normal form. 8/2836 useless extension candidates. Maximal degree in co-relation 16281. Up to 2573 conditions per place. [2024-06-20 16:23:33,504 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 113 selfloop transitions, 28 changer transitions 0/147 dead transitions. [2024-06-20 16:23:33,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 147 transitions, 1302 flow [2024-06-20 16:23:33,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:33,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:33,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 16:23:33,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-20 16:23:33,506 INFO L175 Difference]: Start difference. First operand has 104 places, 117 transitions, 924 flow. Second operand 8 states and 145 transitions. [2024-06-20 16:23:33,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 147 transitions, 1302 flow [2024-06-20 16:23:33,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 147 transitions, 1207 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-20 16:23:33,556 INFO L231 Difference]: Finished difference. Result has 107 places, 117 transitions, 893 flow [2024-06-20 16:23:33,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=893, PETRI_PLACES=107, PETRI_TRANSITIONS=117} [2024-06-20 16:23:33,556 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-06-20 16:23:33,556 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 117 transitions, 893 flow [2024-06-20 16:23:33,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 16:23:33,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:33,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:33,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:23:33,557 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)] === [2024-06-20 16:23:33,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:33,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1506061940, now seen corresponding path program 3 times [2024-06-20 16:23:33,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:33,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134808505] [2024-06-20 16:23:33,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:33,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:34,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:34,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:34,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134808505] [2024-06-20 16:23:34,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134808505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:34,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:34,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:34,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637016253] [2024-06-20 16:23:34,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:34,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:34,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:34,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:34,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:34,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:34,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 117 transitions, 893 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 16:23:34,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:34,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:34,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:35,114 INFO L124 PetriNetUnfolderBase]: 1834/2855 cut-off events. [2024-06-20 16:23:35,114 INFO L125 PetriNetUnfolderBase]: For 78974/78978 co-relation queries the response was YES. [2024-06-20 16:23:35,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16651 conditions, 2855 events. 1834/2855 cut-off events. For 78974/78978 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 14331 event pairs, 593 based on Foata normal form. 6/2860 useless extension candidates. Maximal degree in co-relation 16605. Up to 2555 conditions per place. [2024-06-20 16:23:35,132 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 100 selfloop transitions, 39 changer transitions 0/145 dead transitions. [2024-06-20 16:23:35,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 145 transitions, 1289 flow [2024-06-20 16:23:35,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:35,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:35,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 16:23:35,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-20 16:23:35,133 INFO L175 Difference]: Start difference. First operand has 107 places, 117 transitions, 893 flow. Second operand 8 states and 146 transitions. [2024-06-20 16:23:35,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 145 transitions, 1289 flow [2024-06-20 16:23:35,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 145 transitions, 1226 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 16:23:35,175 INFO L231 Difference]: Finished difference. Result has 108 places, 119 transitions, 959 flow [2024-06-20 16:23:35,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=959, PETRI_PLACES=108, PETRI_TRANSITIONS=119} [2024-06-20 16:23:35,175 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-20 16:23:35,176 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 119 transitions, 959 flow [2024-06-20 16:23:35,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 16:23:35,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:35,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:35,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:23:35,176 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)] === [2024-06-20 16:23:35,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:35,177 INFO L85 PathProgramCache]: Analyzing trace with hash -512102242, now seen corresponding path program 1 times [2024-06-20 16:23:35,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:35,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260472961] [2024-06-20 16:23:35,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:35,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:35,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:36,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:36,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:36,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260472961] [2024-06-20 16:23:36,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260472961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:36,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:36,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:23:36,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23389661] [2024-06-20 16:23:36,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:36,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:23:36,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:36,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:23:36,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:23:36,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:36,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 119 transitions, 959 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:36,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:36,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:36,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:37,229 INFO L124 PetriNetUnfolderBase]: 1891/2945 cut-off events. [2024-06-20 16:23:37,230 INFO L125 PetriNetUnfolderBase]: For 86260/86260 co-relation queries the response was YES. [2024-06-20 16:23:37,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17493 conditions, 2945 events. 1891/2945 cut-off events. For 86260/86260 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 14734 event pairs, 550 based on Foata normal form. 4/2947 useless extension candidates. Maximal degree in co-relation 17446. Up to 2608 conditions per place. [2024-06-20 16:23:37,252 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 115 selfloop transitions, 41 changer transitions 0/162 dead transitions. [2024-06-20 16:23:37,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 162 transitions, 1501 flow [2024-06-20 16:23:37,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:23:37,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:23:37,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:23:37,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-20 16:23:37,269 INFO L175 Difference]: Start difference. First operand has 108 places, 119 transitions, 959 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:23:37,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 162 transitions, 1501 flow [2024-06-20 16:23:37,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 162 transitions, 1378 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 16:23:37,343 INFO L231 Difference]: Finished difference. Result has 115 places, 134 transitions, 1127 flow [2024-06-20 16:23:37,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=848, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1127, PETRI_PLACES=115, PETRI_TRANSITIONS=134} [2024-06-20 16:23:37,343 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-20 16:23:37,344 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 134 transitions, 1127 flow [2024-06-20 16:23:37,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:37,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:37,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:37,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:23:37,344 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:23:37,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:37,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1527889677, now seen corresponding path program 1 times [2024-06-20 16:23:37,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:37,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474686601] [2024-06-20 16:23:37,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:37,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:37,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:38,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:38,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:38,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474686601] [2024-06-20 16:23:38,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474686601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:38,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:38,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:23:38,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204371391] [2024-06-20 16:23:38,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:38,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:23:38,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:38,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:23:38,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:23:38,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 16:23:38,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 134 transitions, 1127 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:38,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:38,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 16:23:38,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:38,601 INFO L124 PetriNetUnfolderBase]: 1776/2795 cut-off events. [2024-06-20 16:23:38,601 INFO L125 PetriNetUnfolderBase]: For 90763/90794 co-relation queries the response was YES. [2024-06-20 16:23:38,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17302 conditions, 2795 events. 1776/2795 cut-off events. For 90763/90794 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 14264 event pairs, 574 based on Foata normal form. 18/2788 useless extension candidates. Maximal degree in co-relation 17250. Up to 2510 conditions per place. [2024-06-20 16:23:38,622 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 107 selfloop transitions, 24 changer transitions 0/150 dead transitions. [2024-06-20 16:23:38,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 150 transitions, 1455 flow [2024-06-20 16:23:38,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:23:38,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:23:38,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-20 16:23:38,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-20 16:23:38,623 INFO L175 Difference]: Start difference. First operand has 115 places, 134 transitions, 1127 flow. Second operand 6 states and 111 transitions. [2024-06-20 16:23:38,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 150 transitions, 1455 flow [2024-06-20 16:23:38,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 150 transitions, 1388 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-20 16:23:38,707 INFO L231 Difference]: Finished difference. Result has 119 places, 137 transitions, 1153 flow [2024-06-20 16:23:38,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1153, PETRI_PLACES=119, PETRI_TRANSITIONS=137} [2024-06-20 16:23:38,712 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-20 16:23:38,712 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 137 transitions, 1153 flow [2024-06-20 16:23:38,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:38,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:38,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:38,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:23:38,713 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)] === [2024-06-20 16:23:38,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:38,714 INFO L85 PathProgramCache]: Analyzing trace with hash -898967296, now seen corresponding path program 4 times [2024-06-20 16:23:38,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:38,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089591682] [2024-06-20 16:23:38,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:38,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:38,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:39,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:39,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:39,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089591682] [2024-06-20 16:23:39,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089591682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:39,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:39,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:39,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498485129] [2024-06-20 16:23:39,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:39,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:39,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:39,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:39,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:39,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:39,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 137 transitions, 1153 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 16:23:39,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:39,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:39,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:40,215 INFO L124 PetriNetUnfolderBase]: 1918/2971 cut-off events. [2024-06-20 16:23:40,215 INFO L125 PetriNetUnfolderBase]: For 97076/97076 co-relation queries the response was YES. [2024-06-20 16:23:40,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18416 conditions, 2971 events. 1918/2971 cut-off events. For 97076/97076 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 14750 event pairs, 601 based on Foata normal form. 4/2974 useless extension candidates. Maximal degree in co-relation 18362. Up to 2650 conditions per place. [2024-06-20 16:23:40,235 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 113 selfloop transitions, 43 changer transitions 0/162 dead transitions. [2024-06-20 16:23:40,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 162 transitions, 1579 flow [2024-06-20 16:23:40,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:40,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:40,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 16:23:40,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-20 16:23:40,251 INFO L175 Difference]: Start difference. First operand has 119 places, 137 transitions, 1153 flow. Second operand 8 states and 143 transitions. [2024-06-20 16:23:40,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 162 transitions, 1579 flow [2024-06-20 16:23:40,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 162 transitions, 1518 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-20 16:23:40,328 INFO L231 Difference]: Finished difference. Result has 123 places, 139 transitions, 1235 flow [2024-06-20 16:23:40,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1092, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1235, PETRI_PLACES=123, PETRI_TRANSITIONS=139} [2024-06-20 16:23:40,331 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-20 16:23:40,331 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 139 transitions, 1235 flow [2024-06-20 16:23:40,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 16:23:40,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:40,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:40,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:23:40,332 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)] === [2024-06-20 16:23:40,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:40,332 INFO L85 PathProgramCache]: Analyzing trace with hash -892526488, now seen corresponding path program 2 times [2024-06-20 16:23:40,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:40,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215394608] [2024-06-20 16:23:40,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:40,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:40,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:41,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:41,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:41,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215394608] [2024-06-20 16:23:41,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215394608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:41,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:41,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:23:41,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432297337] [2024-06-20 16:23:41,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:41,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:23:41,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:41,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:23:41,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:23:41,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:41,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 139 transitions, 1235 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:41,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:41,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:41,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:42,390 INFO L124 PetriNetUnfolderBase]: 1935/3000 cut-off events. [2024-06-20 16:23:42,390 INFO L125 PetriNetUnfolderBase]: For 104791/104793 co-relation queries the response was YES. [2024-06-20 16:23:42,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19010 conditions, 3000 events. 1935/3000 cut-off events. For 104791/104793 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 14877 event pairs, 534 based on Foata normal form. 6/3005 useless extension candidates. Maximal degree in co-relation 18955. Up to 2662 conditions per place. [2024-06-20 16:23:42,410 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 119 selfloop transitions, 42 changer transitions 0/167 dead transitions. [2024-06-20 16:23:42,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 167 transitions, 1677 flow [2024-06-20 16:23:42,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:42,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:42,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 16:23:42,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:23:42,412 INFO L175 Difference]: Start difference. First operand has 123 places, 139 transitions, 1235 flow. Second operand 8 states and 144 transitions. [2024-06-20 16:23:42,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 167 transitions, 1677 flow [2024-06-20 16:23:42,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 167 transitions, 1552 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-20 16:23:42,472 INFO L231 Difference]: Finished difference. Result has 125 places, 141 transitions, 1247 flow [2024-06-20 16:23:42,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1110, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1247, PETRI_PLACES=125, PETRI_TRANSITIONS=141} [2024-06-20 16:23:42,472 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-20 16:23:42,473 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 141 transitions, 1247 flow [2024-06-20 16:23:42,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:42,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:42,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:42,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:23:42,473 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:23:42,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:42,474 INFO L85 PathProgramCache]: Analyzing trace with hash -898782598, now seen corresponding path program 3 times [2024-06-20 16:23:42,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:42,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508630702] [2024-06-20 16:23:42,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:42,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:42,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:43,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:43,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:43,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508630702] [2024-06-20 16:23:43,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508630702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:43,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:43,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:23:43,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164299871] [2024-06-20 16:23:43,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:43,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:23:43,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:43,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:23:43,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:23:43,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:43,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 141 transitions, 1247 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:43,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:43,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:43,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:44,421 INFO L124 PetriNetUnfolderBase]: 1952/3027 cut-off events. [2024-06-20 16:23:44,422 INFO L125 PetriNetUnfolderBase]: For 111998/112000 co-relation queries the response was YES. [2024-06-20 16:23:44,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19504 conditions, 3027 events. 1952/3027 cut-off events. For 111998/112000 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 15098 event pairs, 539 based on Foata normal form. 6/3032 useless extension candidates. Maximal degree in co-relation 19448. Up to 2689 conditions per place. [2024-06-20 16:23:44,441 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 124 selfloop transitions, 40 changer transitions 0/170 dead transitions. [2024-06-20 16:23:44,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 170 transitions, 1701 flow [2024-06-20 16:23:44,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:44,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:44,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 16:23:44,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-20 16:23:44,442 INFO L175 Difference]: Start difference. First operand has 125 places, 141 transitions, 1247 flow. Second operand 8 states and 146 transitions. [2024-06-20 16:23:44,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 170 transitions, 1701 flow [2024-06-20 16:23:44,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 170 transitions, 1582 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-20 16:23:44,521 INFO L231 Difference]: Finished difference. Result has 127 places, 143 transitions, 1265 flow [2024-06-20 16:23:44,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1128, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1265, PETRI_PLACES=127, PETRI_TRANSITIONS=143} [2024-06-20 16:23:44,522 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-20 16:23:44,522 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 143 transitions, 1265 flow [2024-06-20 16:23:44,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:44,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:44,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:44,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:23:44,523 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)] === [2024-06-20 16:23:44,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:44,523 INFO L85 PathProgramCache]: Analyzing trace with hash -662310568, now seen corresponding path program 4 times [2024-06-20 16:23:44,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:44,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659362958] [2024-06-20 16:23:44,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:44,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:44,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:45,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:45,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:45,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659362958] [2024-06-20 16:23:45,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659362958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:45,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:45,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:23:45,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200247100] [2024-06-20 16:23:45,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:45,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:23:45,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:45,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:23:45,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:23:45,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:45,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 143 transitions, 1265 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:45,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:45,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:45,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:46,538 INFO L124 PetriNetUnfolderBase]: 1969/3054 cut-off events. [2024-06-20 16:23:46,539 INFO L125 PetriNetUnfolderBase]: For 119930/119932 co-relation queries the response was YES. [2024-06-20 16:23:46,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20000 conditions, 3054 events. 1969/3054 cut-off events. For 119930/119932 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 15243 event pairs, 501 based on Foata normal form. 6/3059 useless extension candidates. Maximal degree in co-relation 19943. Up to 2615 conditions per place. [2024-06-20 16:23:46,563 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 118 selfloop transitions, 51 changer transitions 0/175 dead transitions. [2024-06-20 16:23:46,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 175 transitions, 1899 flow [2024-06-20 16:23:46,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:46,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:46,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 16:23:46,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-20 16:23:46,565 INFO L175 Difference]: Start difference. First operand has 127 places, 143 transitions, 1265 flow. Second operand 8 states and 146 transitions. [2024-06-20 16:23:46,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 175 transitions, 1899 flow [2024-06-20 16:23:46,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 175 transitions, 1780 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-20 16:23:46,658 INFO L231 Difference]: Finished difference. Result has 129 places, 147 transitions, 1359 flow [2024-06-20 16:23:46,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1359, PETRI_PLACES=129, PETRI_TRANSITIONS=147} [2024-06-20 16:23:46,658 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-20 16:23:46,658 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 147 transitions, 1359 flow [2024-06-20 16:23:46,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:46,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:46,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:46,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 16:23:46,659 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)] === [2024-06-20 16:23:46,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:46,659 INFO L85 PathProgramCache]: Analyzing trace with hash -765517415, now seen corresponding path program 2 times [2024-06-20 16:23:46,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:46,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421165354] [2024-06-20 16:23:46,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:46,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:46,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:47,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:47,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:47,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421165354] [2024-06-20 16:23:47,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421165354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:47,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:47,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:23:47,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075821634] [2024-06-20 16:23:47,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:47,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:23:47,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:47,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:23:47,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:23:47,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 16:23:47,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 147 transitions, 1359 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:47,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:47,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 16:23:47,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:47,924 INFO L124 PetriNetUnfolderBase]: 1798/2833 cut-off events. [2024-06-20 16:23:47,924 INFO L125 PetriNetUnfolderBase]: For 123801/123832 co-relation queries the response was YES. [2024-06-20 16:23:47,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18998 conditions, 2833 events. 1798/2833 cut-off events. For 123801/123832 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 14484 event pairs, 581 based on Foata normal form. 17/2819 useless extension candidates. Maximal degree in co-relation 18940. Up to 2536 conditions per place. [2024-06-20 16:23:47,947 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 107 selfloop transitions, 28 changer transitions 0/158 dead transitions. [2024-06-20 16:23:47,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 158 transitions, 1685 flow [2024-06-20 16:23:47,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:23:47,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:23:47,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-20 16:23:47,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-20 16:23:47,948 INFO L175 Difference]: Start difference. First operand has 129 places, 147 transitions, 1359 flow. Second operand 6 states and 107 transitions. [2024-06-20 16:23:47,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 158 transitions, 1685 flow [2024-06-20 16:23:48,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 158 transitions, 1577 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-20 16:23:48,045 INFO L231 Difference]: Finished difference. Result has 131 places, 150 transitions, 1353 flow [2024-06-20 16:23:48,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1353, PETRI_PLACES=131, PETRI_TRANSITIONS=150} [2024-06-20 16:23:48,045 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-20 16:23:48,045 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 150 transitions, 1353 flow [2024-06-20 16:23:48,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:48,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:48,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:48,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 16:23:48,046 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:23:48,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:48,046 INFO L85 PathProgramCache]: Analyzing trace with hash -230388742, now seen corresponding path program 5 times [2024-06-20 16:23:48,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:48,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73756714] [2024-06-20 16:23:48,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:48,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:48,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:49,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:49,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:49,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73756714] [2024-06-20 16:23:49,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73756714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:49,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:49,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:23:49,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558597591] [2024-06-20 16:23:49,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:49,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:23:49,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:49,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:23:49,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:23:49,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:49,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 150 transitions, 1353 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:49,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:49,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:49,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:49,986 INFO L124 PetriNetUnfolderBase]: 2043/3169 cut-off events. [2024-06-20 16:23:49,986 INFO L125 PetriNetUnfolderBase]: For 131061/131061 co-relation queries the response was YES. [2024-06-20 16:23:49,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21172 conditions, 3169 events. 2043/3169 cut-off events. For 131061/131061 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 15909 event pairs, 543 based on Foata normal form. 4/3171 useless extension candidates. Maximal degree in co-relation 21112. Up to 2770 conditions per place. [2024-06-20 16:23:50,012 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 138 selfloop transitions, 64 changer transitions 0/208 dead transitions. [2024-06-20 16:23:50,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 208 transitions, 2083 flow [2024-06-20 16:23:50,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:23:50,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:23:50,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 16:23:50,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-20 16:23:50,013 INFO L175 Difference]: Start difference. First operand has 131 places, 150 transitions, 1353 flow. Second operand 9 states and 169 transitions. [2024-06-20 16:23:50,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 208 transitions, 2083 flow [2024-06-20 16:23:50,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 208 transitions, 1985 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-20 16:23:50,146 INFO L231 Difference]: Finished difference. Result has 138 places, 173 transitions, 1647 flow [2024-06-20 16:23:50,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1255, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1647, PETRI_PLACES=138, PETRI_TRANSITIONS=173} [2024-06-20 16:23:50,146 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-20 16:23:50,146 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 173 transitions, 1647 flow [2024-06-20 16:23:50,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:50,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:50,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:50,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 16:23:50,147 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)] === [2024-06-20 16:23:50,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:50,147 INFO L85 PathProgramCache]: Analyzing trace with hash -288733897, now seen corresponding path program 1 times [2024-06-20 16:23:50,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:50,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755504600] [2024-06-20 16:23:50,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:50,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:50,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:50,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:50,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:50,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755504600] [2024-06-20 16:23:50,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755504600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:50,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:50,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:23:50,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86196650] [2024-06-20 16:23:50,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:50,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:23:50,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:50,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:23:50,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:23:51,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 16:23:51,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 173 transitions, 1647 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:51,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:51,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 16:23:51,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:51,460 INFO L124 PetriNetUnfolderBase]: 1841/2946 cut-off events. [2024-06-20 16:23:51,460 INFO L125 PetriNetUnfolderBase]: For 118285/118285 co-relation queries the response was YES. [2024-06-20 16:23:51,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19636 conditions, 2946 events. 1841/2946 cut-off events. For 118285/118285 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 15266 event pairs, 556 based on Foata normal form. 1/2946 useless extension candidates. Maximal degree in co-relation 19573. Up to 2695 conditions per place. [2024-06-20 16:23:51,482 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 168 selfloop transitions, 12 changer transitions 0/187 dead transitions. [2024-06-20 16:23:51,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 187 transitions, 2081 flow [2024-06-20 16:23:51,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:23:51,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:23:51,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-20 16:23:51,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:23:51,483 INFO L175 Difference]: Start difference. First operand has 138 places, 173 transitions, 1647 flow. Second operand 6 states and 108 transitions. [2024-06-20 16:23:51,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 187 transitions, 2081 flow [2024-06-20 16:23:51,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 187 transitions, 1958 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 16:23:51,577 INFO L231 Difference]: Finished difference. Result has 138 places, 176 transitions, 1598 flow [2024-06-20 16:23:51,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1598, PETRI_PLACES=138, PETRI_TRANSITIONS=176} [2024-06-20 16:23:51,578 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-20 16:23:51,578 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 176 transitions, 1598 flow [2024-06-20 16:23:51,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:51,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:51,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:51,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 16:23:51,579 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:23:51,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:51,579 INFO L85 PathProgramCache]: Analyzing trace with hash -765511463, now seen corresponding path program 2 times [2024-06-20 16:23:51,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:51,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544820534] [2024-06-20 16:23:51,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:51,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:51,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:52,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:52,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:52,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544820534] [2024-06-20 16:23:52,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544820534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:52,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:52,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:23:52,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592420428] [2024-06-20 16:23:52,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:52,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:23:52,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:52,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:23:52,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:23:52,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 16:23:52,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 176 transitions, 1598 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:52,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:52,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 16:23:52,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:52,828 INFO L124 PetriNetUnfolderBase]: 1838/2943 cut-off events. [2024-06-20 16:23:52,828 INFO L125 PetriNetUnfolderBase]: For 123571/123573 co-relation queries the response was YES. [2024-06-20 16:23:52,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19745 conditions, 2943 events. 1838/2943 cut-off events. For 123571/123573 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 15255 event pairs, 560 based on Foata normal form. 3/2945 useless extension candidates. Maximal degree in co-relation 19681. Up to 2685 conditions per place. [2024-06-20 16:23:52,850 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 163 selfloop transitions, 17 changer transitions 0/187 dead transitions. [2024-06-20 16:23:52,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 187 transitions, 2026 flow [2024-06-20 16:23:52,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:23:52,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:23:52,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-20 16:23:52,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-20 16:23:52,872 INFO L175 Difference]: Start difference. First operand has 138 places, 176 transitions, 1598 flow. Second operand 6 states and 107 transitions. [2024-06-20 16:23:52,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 187 transitions, 2026 flow [2024-06-20 16:23:52,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 187 transitions, 1961 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 16:23:52,990 INFO L231 Difference]: Finished difference. Result has 139 places, 179 transitions, 1623 flow [2024-06-20 16:23:52,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1533, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1623, PETRI_PLACES=139, PETRI_TRANSITIONS=179} [2024-06-20 16:23:52,991 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-20 16:23:52,991 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 179 transitions, 1623 flow [2024-06-20 16:23:52,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:52,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:52,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:52,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 16:23:52,992 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:23:52,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:52,993 INFO L85 PathProgramCache]: Analyzing trace with hash -765503527, now seen corresponding path program 1 times [2024-06-20 16:23:52,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:52,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45971108] [2024-06-20 16:23:52,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:52,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:53,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:53,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:53,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45971108] [2024-06-20 16:23:53,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45971108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:53,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:53,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:23:53,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005111125] [2024-06-20 16:23:53,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:53,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:23:53,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:53,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:23:53,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:23:53,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 16:23:53,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 179 transitions, 1623 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-20 16:23:53,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:53,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 16:23:53,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:54,378 INFO L124 PetriNetUnfolderBase]: 1801/2881 cut-off events. [2024-06-20 16:23:54,379 INFO L125 PetriNetUnfolderBase]: For 127349/127380 co-relation queries the response was YES. [2024-06-20 16:23:54,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19527 conditions, 2881 events. 1801/2881 cut-off events. For 127349/127380 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 15017 event pairs, 583 based on Foata normal form. 17/2870 useless extension candidates. Maximal degree in co-relation 19463. Up to 2612 conditions per place. [2024-06-20 16:23:54,400 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 146 selfloop transitions, 15 changer transitions 0/191 dead transitions. [2024-06-20 16:23:54,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 191 transitions, 2007 flow [2024-06-20 16:23:54,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:23:54,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:23:54,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 16:23:54,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 16:23:54,402 INFO L175 Difference]: Start difference. First operand has 139 places, 179 transitions, 1623 flow. Second operand 7 states and 119 transitions. [2024-06-20 16:23:54,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 191 transitions, 2007 flow [2024-06-20 16:23:54,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 191 transitions, 1939 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-20 16:23:54,520 INFO L231 Difference]: Finished difference. Result has 142 places, 182 transitions, 1633 flow [2024-06-20 16:23:54,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1555, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1633, PETRI_PLACES=142, PETRI_TRANSITIONS=182} [2024-06-20 16:23:54,520 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-20 16:23:54,521 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 182 transitions, 1633 flow [2024-06-20 16:23:54,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-20 16:23:54,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:54,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:54,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 16:23:54,521 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)] === [2024-06-20 16:23:54,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:54,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1189097102, now seen corresponding path program 1 times [2024-06-20 16:23:54,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:54,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415460530] [2024-06-20 16:23:54,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:54,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:55,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:55,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:55,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415460530] [2024-06-20 16:23:55,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415460530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:55,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:55,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:23:55,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809288567] [2024-06-20 16:23:55,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:55,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:23:55,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:55,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:23:55,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:23:55,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:55,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 182 transitions, 1633 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:55,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:55,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:55,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:56,479 INFO L124 PetriNetUnfolderBase]: 2221/3442 cut-off events. [2024-06-20 16:23:56,480 INFO L125 PetriNetUnfolderBase]: For 182955/182955 co-relation queries the response was YES. [2024-06-20 16:23:56,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25111 conditions, 3442 events. 2221/3442 cut-off events. For 182955/182955 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17624 event pairs, 512 based on Foata normal form. 16/3451 useless extension candidates. Maximal degree in co-relation 25046. Up to 2826 conditions per place. [2024-06-20 16:23:56,505 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 186 selfloop transitions, 39 changer transitions 0/231 dead transitions. [2024-06-20 16:23:56,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 231 transitions, 2465 flow [2024-06-20 16:23:56,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:23:56,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:23:56,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-20 16:23:56,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-20 16:23:56,506 INFO L175 Difference]: Start difference. First operand has 142 places, 182 transitions, 1633 flow. Second operand 10 states and 188 transitions. [2024-06-20 16:23:56,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 231 transitions, 2465 flow [2024-06-20 16:23:56,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 231 transitions, 2409 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 16:23:56,658 INFO L231 Difference]: Finished difference. Result has 147 places, 184 transitions, 1743 flow [2024-06-20 16:23:56,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1577, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1743, PETRI_PLACES=147, PETRI_TRANSITIONS=184} [2024-06-20 16:23:56,658 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-20 16:23:56,658 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 184 transitions, 1743 flow [2024-06-20 16:23:56,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:56,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:56,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:56,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 16:23:56,659 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)] === [2024-06-20 16:23:56,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:56,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1277810732, now seen corresponding path program 2 times [2024-06-20 16:23:56,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:56,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828110079] [2024-06-20 16:23:56,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:56,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:56,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:57,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:57,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828110079] [2024-06-20 16:23:57,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828110079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:57,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:57,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:23:57,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547618457] [2024-06-20 16:23:57,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:57,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:23:57,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:57,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:23:57,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:23:57,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:57,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 184 transitions, 1743 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:57,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:57,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:57,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:58,463 INFO L124 PetriNetUnfolderBase]: 2271/3536 cut-off events. [2024-06-20 16:23:58,464 INFO L125 PetriNetUnfolderBase]: For 195069/195069 co-relation queries the response was YES. [2024-06-20 16:23:58,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25887 conditions, 3536 events. 2271/3536 cut-off events. For 195069/195069 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 18237 event pairs, 685 based on Foata normal form. 20/3553 useless extension candidates. Maximal degree in co-relation 25821. Up to 3148 conditions per place. [2024-06-20 16:23:58,489 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 180 selfloop transitions, 35 changer transitions 0/221 dead transitions. [2024-06-20 16:23:58,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 221 transitions, 2351 flow [2024-06-20 16:23:58,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:23:58,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:23:58,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 16:23:58,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-20 16:23:58,493 INFO L175 Difference]: Start difference. First operand has 147 places, 184 transitions, 1743 flow. Second operand 9 states and 165 transitions. [2024-06-20 16:23:58,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 221 transitions, 2351 flow [2024-06-20 16:23:58,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 221 transitions, 2268 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-20 16:23:58,640 INFO L231 Difference]: Finished difference. Result has 150 places, 185 transitions, 1781 flow [2024-06-20 16:23:58,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1664, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1781, PETRI_PLACES=150, PETRI_TRANSITIONS=185} [2024-06-20 16:23:58,642 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-20 16:23:58,642 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 185 transitions, 1781 flow [2024-06-20 16:23:58,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:58,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:58,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:58,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 16:23:58,643 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:23:58,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:58,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1277662862, now seen corresponding path program 3 times [2024-06-20 16:23:58,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:58,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108170378] [2024-06-20 16:23:58,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:58,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:58,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:59,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:59,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:59,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108170378] [2024-06-20 16:23:59,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108170378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:59,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:59,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:23:59,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123749112] [2024-06-20 16:23:59,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:59,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:23:59,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:59,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:23:59,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:23:59,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:59,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 185 transitions, 1781 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:59,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:59,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:59,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:00,589 INFO L124 PetriNetUnfolderBase]: 2243/3492 cut-off events. [2024-06-20 16:24:00,589 INFO L125 PetriNetUnfolderBase]: For 191415/191415 co-relation queries the response was YES. [2024-06-20 16:24:00,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25141 conditions, 3492 events. 2243/3492 cut-off events. For 191415/191415 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 17974 event pairs, 645 based on Foata normal form. 16/3505 useless extension candidates. Maximal degree in co-relation 25073. Up to 2989 conditions per place. [2024-06-20 16:24:00,620 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 183 selfloop transitions, 36 changer transitions 0/225 dead transitions. [2024-06-20 16:24:00,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 225 transitions, 2371 flow [2024-06-20 16:24:00,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:24:00,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:24:00,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 16:24:00,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-20 16:24:00,622 INFO L175 Difference]: Start difference. First operand has 150 places, 185 transitions, 1781 flow. Second operand 9 states and 169 transitions. [2024-06-20 16:24:00,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 225 transitions, 2371 flow [2024-06-20 16:24:00,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 225 transitions, 2268 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-20 16:24:00,848 INFO L231 Difference]: Finished difference. Result has 152 places, 185 transitions, 1756 flow [2024-06-20 16:24:00,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1678, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1756, PETRI_PLACES=152, PETRI_TRANSITIONS=185} [2024-06-20 16:24:00,848 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-20 16:24:00,848 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 185 transitions, 1756 flow [2024-06-20 16:24:00,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:00,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:00,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:00,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 16:24:00,849 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)] === [2024-06-20 16:24:00,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:00,849 INFO L85 PathProgramCache]: Analyzing trace with hash 556869706, now seen corresponding path program 4 times [2024-06-20 16:24:00,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:00,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190613055] [2024-06-20 16:24:00,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:00,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:00,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:01,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:01,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190613055] [2024-06-20 16:24:01,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190613055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:01,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:01,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:24:01,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18601582] [2024-06-20 16:24:01,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:01,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:24:01,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:01,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:24:01,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:24:01,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:01,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 185 transitions, 1756 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:01,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:01,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:01,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:02,784 INFO L124 PetriNetUnfolderBase]: 2318/3620 cut-off events. [2024-06-20 16:24:02,784 INFO L125 PetriNetUnfolderBase]: For 203356/203356 co-relation queries the response was YES. [2024-06-20 16:24:02,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25895 conditions, 3620 events. 2318/3620 cut-off events. For 203356/203356 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18837 event pairs, 603 based on Foata normal form. 20/3638 useless extension candidates. Maximal degree in co-relation 25826. Up to 2881 conditions per place. [2024-06-20 16:24:02,814 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 136 selfloop transitions, 83 changer transitions 0/225 dead transitions. [2024-06-20 16:24:02,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 225 transitions, 2381 flow [2024-06-20 16:24:02,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:24:02,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:24:02,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-20 16:24:02,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-20 16:24:02,816 INFO L175 Difference]: Start difference. First operand has 152 places, 185 transitions, 1756 flow. Second operand 9 states and 174 transitions. [2024-06-20 16:24:02,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 225 transitions, 2381 flow [2024-06-20 16:24:02,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 225 transitions, 2287 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-20 16:24:02,972 INFO L231 Difference]: Finished difference. Result has 153 places, 186 transitions, 1879 flow [2024-06-20 16:24:02,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1662, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1879, PETRI_PLACES=153, PETRI_TRANSITIONS=186} [2024-06-20 16:24:02,972 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-20 16:24:02,973 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 186 transitions, 1879 flow [2024-06-20 16:24:02,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:02,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:02,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:02,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 16:24:02,973 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)] === [2024-06-20 16:24:02,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:02,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1655475522, now seen corresponding path program 5 times [2024-06-20 16:24:02,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:02,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222931159] [2024-06-20 16:24:02,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:02,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:03,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:03,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:03,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222931159] [2024-06-20 16:24:03,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222931159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:03,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:03,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:24:03,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187040120] [2024-06-20 16:24:03,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:03,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:24:03,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:03,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:24:03,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:24:03,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:03,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 186 transitions, 1879 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:03,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:03,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:03,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:04,847 INFO L124 PetriNetUnfolderBase]: 2487/3904 cut-off events. [2024-06-20 16:24:04,847 INFO L125 PetriNetUnfolderBase]: For 231096/231096 co-relation queries the response was YES. [2024-06-20 16:24:04,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28775 conditions, 3904 events. 2487/3904 cut-off events. For 231096/231096 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 20873 event pairs, 622 based on Foata normal form. 16/3918 useless extension candidates. Maximal degree in co-relation 28705. Up to 2884 conditions per place. [2024-06-20 16:24:04,879 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 140 selfloop transitions, 86 changer transitions 0/232 dead transitions. [2024-06-20 16:24:04,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 232 transitions, 2728 flow [2024-06-20 16:24:04,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:24:04,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:24:04,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-20 16:24:04,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-20 16:24:04,881 INFO L175 Difference]: Start difference. First operand has 153 places, 186 transitions, 1879 flow. Second operand 9 states and 178 transitions. [2024-06-20 16:24:04,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 232 transitions, 2728 flow [2024-06-20 16:24:05,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 232 transitions, 2539 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-20 16:24:05,099 INFO L231 Difference]: Finished difference. Result has 155 places, 188 transitions, 1958 flow [2024-06-20 16:24:05,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1690, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1958, PETRI_PLACES=155, PETRI_TRANSITIONS=188} [2024-06-20 16:24:05,099 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-20 16:24:05,100 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 188 transitions, 1958 flow [2024-06-20 16:24:05,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:05,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:05,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:05,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 16:24:05,100 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)] === [2024-06-20 16:24:05,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:05,101 INFO L85 PathProgramCache]: Analyzing trace with hash 562232086, now seen corresponding path program 6 times [2024-06-20 16:24:05,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:05,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520608945] [2024-06-20 16:24:05,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:05,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:05,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:06,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:06,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:06,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520608945] [2024-06-20 16:24:06,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520608945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:06,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:06,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:24:06,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740475507] [2024-06-20 16:24:06,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:06,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:24:06,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:06,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:24:06,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:24:06,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:06,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 188 transitions, 1958 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:06,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:06,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:06,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:07,353 INFO L124 PetriNetUnfolderBase]: 2451/3846 cut-off events. [2024-06-20 16:24:07,353 INFO L125 PetriNetUnfolderBase]: For 227272/227272 co-relation queries the response was YES. [2024-06-20 16:24:07,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27747 conditions, 3846 events. 2451/3846 cut-off events. For 227272/227272 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 20503 event pairs, 618 based on Foata normal form. 20/3864 useless extension candidates. Maximal degree in co-relation 27676. Up to 3104 conditions per place. [2024-06-20 16:24:07,379 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 137 selfloop transitions, 84 changer transitions 0/227 dead transitions. [2024-06-20 16:24:07,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 227 transitions, 2550 flow [2024-06-20 16:24:07,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:24:07,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:24:07,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-20 16:24:07,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-20 16:24:07,381 INFO L175 Difference]: Start difference. First operand has 155 places, 188 transitions, 1958 flow. Second operand 9 states and 172 transitions. [2024-06-20 16:24:07,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 227 transitions, 2550 flow [2024-06-20 16:24:07,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 227 transitions, 2392 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-20 16:24:07,580 INFO L231 Difference]: Finished difference. Result has 159 places, 188 transitions, 1975 flow [2024-06-20 16:24:07,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1800, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1975, PETRI_PLACES=159, PETRI_TRANSITIONS=188} [2024-06-20 16:24:07,581 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-20 16:24:07,581 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 188 transitions, 1975 flow [2024-06-20 16:24:07,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:07,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:07,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:07,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 16:24:07,581 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)] === [2024-06-20 16:24:07,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:07,582 INFO L85 PathProgramCache]: Analyzing trace with hash 562447288, now seen corresponding path program 1 times [2024-06-20 16:24:07,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:07,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981825232] [2024-06-20 16:24:07,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:07,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:07,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:08,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:08,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:08,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981825232] [2024-06-20 16:24:08,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981825232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:08,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:08,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:24:08,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784984084] [2024-06-20 16:24:08,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:08,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:24:08,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:08,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:24:08,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:24:08,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:08,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 188 transitions, 1975 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:08,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:08,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:08,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:09,822 INFO L124 PetriNetUnfolderBase]: 2492/3917 cut-off events. [2024-06-20 16:24:09,823 INFO L125 PetriNetUnfolderBase]: For 227470/227470 co-relation queries the response was YES. [2024-06-20 16:24:09,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28278 conditions, 3917 events. 2492/3917 cut-off events. For 227470/227470 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 21050 event pairs, 614 based on Foata normal form. 12/3927 useless extension candidates. Maximal degree in co-relation 28205. Up to 2801 conditions per place. [2024-06-20 16:24:09,855 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 135 selfloop transitions, 89 changer transitions 0/230 dead transitions. [2024-06-20 16:24:09,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 230 transitions, 2637 flow [2024-06-20 16:24:09,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:24:09,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:24:09,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-20 16:24:09,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-20 16:24:09,857 INFO L175 Difference]: Start difference. First operand has 159 places, 188 transitions, 1975 flow. Second operand 9 states and 173 transitions. [2024-06-20 16:24:09,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 230 transitions, 2637 flow [2024-06-20 16:24:10,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 230 transitions, 2459 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 16:24:10,057 INFO L231 Difference]: Finished difference. Result has 160 places, 189 transitions, 2031 flow [2024-06-20 16:24:10,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1797, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2031, PETRI_PLACES=160, PETRI_TRANSITIONS=189} [2024-06-20 16:24:10,057 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-20 16:24:10,057 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 189 transitions, 2031 flow [2024-06-20 16:24:10,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:10,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:10,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:10,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 16:24:10,058 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:24:10,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:10,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1684501937, now seen corresponding path program 1 times [2024-06-20 16:24:10,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:10,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978515256] [2024-06-20 16:24:10,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:10,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:10,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:10,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:10,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978515256] [2024-06-20 16:24:10,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978515256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:10,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:10,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:24:10,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846382367] [2024-06-20 16:24:10,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:10,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:24:10,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:10,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:24:10,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:24:10,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:10,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 189 transitions, 2031 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 16:24:10,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:10,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:10,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:11,579 INFO L124 PetriNetUnfolderBase]: 2430/3833 cut-off events. [2024-06-20 16:24:11,579 INFO L125 PetriNetUnfolderBase]: For 228257/228288 co-relation queries the response was YES. [2024-06-20 16:24:11,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27927 conditions, 3833 events. 2430/3833 cut-off events. For 228257/228288 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 20899 event pairs, 752 based on Foata normal form. 18/3816 useless extension candidates. Maximal degree in co-relation 27853. Up to 3579 conditions per place. [2024-06-20 16:24:11,614 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 150 selfloop transitions, 27 changer transitions 0/206 dead transitions. [2024-06-20 16:24:11,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 206 transitions, 2467 flow [2024-06-20 16:24:11,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:24:11,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:24:11,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 16:24:11,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 16:24:11,619 INFO L175 Difference]: Start difference. First operand has 160 places, 189 transitions, 2031 flow. Second operand 7 states and 119 transitions. [2024-06-20 16:24:11,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 206 transitions, 2467 flow [2024-06-20 16:24:11,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 206 transitions, 2259 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-20 16:24:11,777 INFO L231 Difference]: Finished difference. Result has 160 places, 192 transitions, 1927 flow [2024-06-20 16:24:11,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1823, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1927, PETRI_PLACES=160, PETRI_TRANSITIONS=192} [2024-06-20 16:24:11,779 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-20 16:24:11,779 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 192 transitions, 1927 flow [2024-06-20 16:24:11,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 16:24:11,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:11,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:11,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 16:24:11,780 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)] === [2024-06-20 16:24:11,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:11,780 INFO L85 PathProgramCache]: Analyzing trace with hash 677297924, now seen corresponding path program 7 times [2024-06-20 16:24:11,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:11,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704348159] [2024-06-20 16:24:11,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:11,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:11,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:12,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:12,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704348159] [2024-06-20 16:24:12,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704348159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:12,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:12,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:24:12,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783747270] [2024-06-20 16:24:12,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:12,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:24:12,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:12,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:24:12,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:24:12,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:12,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 192 transitions, 1927 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:12,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:12,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:12,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:13,805 INFO L124 PetriNetUnfolderBase]: 2587/4083 cut-off events. [2024-06-20 16:24:13,805 INFO L125 PetriNetUnfolderBase]: For 255976/255976 co-relation queries the response was YES. [2024-06-20 16:24:13,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29654 conditions, 4083 events. 2587/4083 cut-off events. For 255976/255976 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 22372 event pairs, 639 based on Foata normal form. 20/4102 useless extension candidates. Maximal degree in co-relation 29579. Up to 3322 conditions per place. [2024-06-20 16:24:13,839 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 138 selfloop transitions, 83 changer transitions 0/228 dead transitions. [2024-06-20 16:24:13,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 228 transitions, 2555 flow [2024-06-20 16:24:13,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:24:13,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:24:13,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 16:24:13,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-20 16:24:13,841 INFO L175 Difference]: Start difference. First operand has 160 places, 192 transitions, 1927 flow. Second operand 9 states and 167 transitions. [2024-06-20 16:24:13,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 228 transitions, 2555 flow [2024-06-20 16:24:14,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 228 transitions, 2473 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 16:24:14,106 INFO L231 Difference]: Finished difference. Result has 164 places, 193 transitions, 2068 flow [2024-06-20 16:24:14,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1845, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2068, PETRI_PLACES=164, PETRI_TRANSITIONS=193} [2024-06-20 16:24:14,106 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-20 16:24:14,106 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 193 transitions, 2068 flow [2024-06-20 16:24:14,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:14,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:14,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:14,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 16:24:14,107 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)] === [2024-06-20 16:24:14,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:14,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1027462378, now seen corresponding path program 8 times [2024-06-20 16:24:14,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:14,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046691259] [2024-06-20 16:24:14,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:14,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:15,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:15,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:15,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046691259] [2024-06-20 16:24:15,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046691259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:15,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:15,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:24:15,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076338450] [2024-06-20 16:24:15,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:15,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:24:15,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:15,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:24:15,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:24:15,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:15,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 193 transitions, 2068 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:15,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:15,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:15,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:16,131 INFO L124 PetriNetUnfolderBase]: 2662/4209 cut-off events. [2024-06-20 16:24:16,131 INFO L125 PetriNetUnfolderBase]: For 273480/273480 co-relation queries the response was YES. [2024-06-20 16:24:16,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31069 conditions, 4209 events. 2662/4209 cut-off events. For 273480/273480 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 23279 event pairs, 650 based on Foata normal form. 20/4228 useless extension candidates. Maximal degree in co-relation 30993. Up to 3447 conditions per place. [2024-06-20 16:24:16,163 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 147 selfloop transitions, 77 changer transitions 0/231 dead transitions. [2024-06-20 16:24:16,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 231 transitions, 2712 flow [2024-06-20 16:24:16,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:24:16,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:24:16,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 16:24:16,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-20 16:24:16,165 INFO L175 Difference]: Start difference. First operand has 164 places, 193 transitions, 2068 flow. Second operand 9 states and 170 transitions. [2024-06-20 16:24:16,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 231 transitions, 2712 flow [2024-06-20 16:24:16,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 231 transitions, 2517 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 16:24:16,387 INFO L231 Difference]: Finished difference. Result has 166 places, 194 transitions, 2086 flow [2024-06-20 16:24:16,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1873, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2086, PETRI_PLACES=166, PETRI_TRANSITIONS=194} [2024-06-20 16:24:16,387 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-20 16:24:16,387 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 194 transitions, 2086 flow [2024-06-20 16:24:16,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:16,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:16,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:16,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 16:24:16,388 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:24:16,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:16,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1032968908, now seen corresponding path program 9 times [2024-06-20 16:24:16,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:16,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988151191] [2024-06-20 16:24:16,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:16,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:17,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:17,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:17,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988151191] [2024-06-20 16:24:17,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988151191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:17,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:17,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:24:17,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403843286] [2024-06-20 16:24:17,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:17,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:24:17,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:17,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:24:17,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:24:17,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:17,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 194 transitions, 2086 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:17,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:17,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:17,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:18,444 INFO L124 PetriNetUnfolderBase]: 2737/4336 cut-off events. [2024-06-20 16:24:18,444 INFO L125 PetriNetUnfolderBase]: For 287271/287271 co-relation queries the response was YES. [2024-06-20 16:24:18,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31919 conditions, 4336 events. 2737/4336 cut-off events. For 287271/287271 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 24236 event pairs, 680 based on Foata normal form. 20/4355 useless extension candidates. Maximal degree in co-relation 31842. Up to 3572 conditions per place. [2024-06-20 16:24:18,482 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 143 selfloop transitions, 80 changer transitions 0/230 dead transitions. [2024-06-20 16:24:18,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 230 transitions, 2717 flow [2024-06-20 16:24:18,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:24:18,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:24:18,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 16:24:18,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-20 16:24:18,484 INFO L175 Difference]: Start difference. First operand has 166 places, 194 transitions, 2086 flow. Second operand 9 states and 169 transitions. [2024-06-20 16:24:18,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 230 transitions, 2717 flow [2024-06-20 16:24:18,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 230 transitions, 2532 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-20 16:24:18,920 INFO L231 Difference]: Finished difference. Result has 168 places, 195 transitions, 2122 flow [2024-06-20 16:24:18,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1901, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2122, PETRI_PLACES=168, PETRI_TRANSITIONS=195} [2024-06-20 16:24:18,921 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-20 16:24:18,921 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 195 transitions, 2122 flow [2024-06-20 16:24:18,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:18,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:18,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:18,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 16:24:18,921 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:24:18,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:18,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1032972628, now seen corresponding path program 10 times [2024-06-20 16:24:18,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:18,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473941089] [2024-06-20 16:24:18,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:18,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:18,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:19,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:19,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:19,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473941089] [2024-06-20 16:24:19,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473941089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:19,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:19,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:24:19,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164330495] [2024-06-20 16:24:19,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:19,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:24:19,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:19,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:24:19,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:24:20,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:20,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 195 transitions, 2122 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:20,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:20,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:20,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:20,967 INFO L124 PetriNetUnfolderBase]: 2745/4356 cut-off events. [2024-06-20 16:24:20,967 INFO L125 PetriNetUnfolderBase]: For 284567/284567 co-relation queries the response was YES. [2024-06-20 16:24:20,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31684 conditions, 4356 events. 2745/4356 cut-off events. For 284567/284567 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 24421 event pairs, 662 based on Foata normal form. 16/4371 useless extension candidates. Maximal degree in co-relation 31606. Up to 3242 conditions per place. [2024-06-20 16:24:21,006 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 143 selfloop transitions, 84 changer transitions 0/234 dead transitions. [2024-06-20 16:24:21,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 234 transitions, 2777 flow [2024-06-20 16:24:21,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:24:21,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:24:21,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-20 16:24:21,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 16:24:21,008 INFO L175 Difference]: Start difference. First operand has 168 places, 195 transitions, 2122 flow. Second operand 9 states and 171 transitions. [2024-06-20 16:24:21,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 234 transitions, 2777 flow [2024-06-20 16:24:21,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 234 transitions, 2584 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-20 16:24:21,409 INFO L231 Difference]: Finished difference. Result has 170 places, 196 transitions, 2159 flow [2024-06-20 16:24:21,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1929, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2159, PETRI_PLACES=170, PETRI_TRANSITIONS=196} [2024-06-20 16:24:21,409 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-20 16:24:21,409 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 196 transitions, 2159 flow [2024-06-20 16:24:21,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:21,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:21,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:21,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 16:24:21,410 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)] === [2024-06-20 16:24:21,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:21,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1891365978, now seen corresponding path program 2 times [2024-06-20 16:24:21,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:21,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055667344] [2024-06-20 16:24:21,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:21,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:21,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:22,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:22,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:22,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055667344] [2024-06-20 16:24:22,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055667344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:22,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:22,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:24:22,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819075492] [2024-06-20 16:24:22,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:22,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:24:22,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:22,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:24:22,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:24:22,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:22,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 196 transitions, 2159 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:22,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:22,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:22,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:23,898 INFO L124 PetriNetUnfolderBase]: 2786/4433 cut-off events. [2024-06-20 16:24:23,898 INFO L125 PetriNetUnfolderBase]: For 290326/290326 co-relation queries the response was YES. [2024-06-20 16:24:23,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32230 conditions, 4433 events. 2786/4433 cut-off events. For 290326/290326 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 25125 event pairs, 675 based on Foata normal form. 12/4444 useless extension candidates. Maximal degree in co-relation 32151. Up to 3573 conditions per place. [2024-06-20 16:24:23,933 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 144 selfloop transitions, 84 changer transitions 0/235 dead transitions. [2024-06-20 16:24:23,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 235 transitions, 2835 flow [2024-06-20 16:24:23,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:24:23,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:24:23,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 16:24:23,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-20 16:24:23,941 INFO L175 Difference]: Start difference. First operand has 170 places, 196 transitions, 2159 flow. Second operand 9 states and 169 transitions. [2024-06-20 16:24:23,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 235 transitions, 2835 flow [2024-06-20 16:24:24,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 235 transitions, 2625 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-20 16:24:24,433 INFO L231 Difference]: Finished difference. Result has 172 places, 197 transitions, 2181 flow [2024-06-20 16:24:24,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1949, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2181, PETRI_PLACES=172, PETRI_TRANSITIONS=197} [2024-06-20 16:24:24,433 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2024-06-20 16:24:24,433 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 197 transitions, 2181 flow [2024-06-20 16:24:24,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:24,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:24,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:24,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 16:24:24,434 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)] === [2024-06-20 16:24:24,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:24,435 INFO L85 PathProgramCache]: Analyzing trace with hash -2092455228, now seen corresponding path program 3 times [2024-06-20 16:24:24,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:24,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652067551] [2024-06-20 16:24:24,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:24,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:24,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:25,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:25,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:25,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652067551] [2024-06-20 16:24:25,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652067551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:25,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:25,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:24:25,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783812197] [2024-06-20 16:24:25,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:25,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:24:25,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:25,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:24:25,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:24:25,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:25,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 197 transitions, 2181 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:25,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:25,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:25,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:26,792 INFO L124 PetriNetUnfolderBase]: 2827/4511 cut-off events. [2024-06-20 16:24:26,793 INFO L125 PetriNetUnfolderBase]: For 300631/300631 co-relation queries the response was YES. [2024-06-20 16:24:26,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32683 conditions, 4511 events. 2827/4511 cut-off events. For 300631/300631 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 25732 event pairs, 696 based on Foata normal form. 12/4522 useless extension candidates. Maximal degree in co-relation 32603. Up to 3524 conditions per place. [2024-06-20 16:24:26,835 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 151 selfloop transitions, 79 changer transitions 0/237 dead transitions. [2024-06-20 16:24:26,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 237 transitions, 2865 flow [2024-06-20 16:24:26,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:24:26,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:24:26,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-20 16:24:26,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 16:24:26,837 INFO L175 Difference]: Start difference. First operand has 172 places, 197 transitions, 2181 flow. Second operand 9 states and 171 transitions. [2024-06-20 16:24:26,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 237 transitions, 2865 flow [2024-06-20 16:24:27,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 237 transitions, 2655 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-20 16:24:27,206 INFO L231 Difference]: Finished difference. Result has 174 places, 198 transitions, 2195 flow [2024-06-20 16:24:27,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1971, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2195, PETRI_PLACES=174, PETRI_TRANSITIONS=198} [2024-06-20 16:24:27,207 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-20 16:24:27,207 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 198 transitions, 2195 flow [2024-06-20 16:24:27,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:27,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:27,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:27,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 16:24:27,207 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)] === [2024-06-20 16:24:27,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:27,208 INFO L85 PathProgramCache]: Analyzing trace with hash 943210406, now seen corresponding path program 4 times [2024-06-20 16:24:27,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:27,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979093456] [2024-06-20 16:24:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:27,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:28,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:28,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:28,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979093456] [2024-06-20 16:24:28,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979093456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:28,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:28,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:24:28,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754444110] [2024-06-20 16:24:28,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:28,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:24:28,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:28,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:24:28,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:24:28,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:28,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 198 transitions, 2195 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:28,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:28,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:28,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:29,652 INFO L124 PetriNetUnfolderBase]: 2807/4482 cut-off events. [2024-06-20 16:24:29,652 INFO L125 PetriNetUnfolderBase]: For 296181/296181 co-relation queries the response was YES. [2024-06-20 16:24:29,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31845 conditions, 4482 events. 2807/4482 cut-off events. For 296181/296181 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 25579 event pairs, 627 based on Foata normal form. 12/4493 useless extension candidates. Maximal degree in co-relation 31764. Up to 2678 conditions per place. [2024-06-20 16:24:29,690 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 129 selfloop transitions, 98 changer transitions 0/234 dead transitions. [2024-06-20 16:24:29,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 234 transitions, 2720 flow [2024-06-20 16:24:29,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:24:29,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:24:29,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 16:24:29,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-20 16:24:29,692 INFO L175 Difference]: Start difference. First operand has 174 places, 198 transitions, 2195 flow. Second operand 9 states and 167 transitions. [2024-06-20 16:24:29,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 234 transitions, 2720 flow [2024-06-20 16:24:30,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 234 transitions, 2518 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-20 16:24:30,149 INFO L231 Difference]: Finished difference. Result has 175 places, 197 transitions, 2107 flow [2024-06-20 16:24:30,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1907, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2107, PETRI_PLACES=175, PETRI_TRANSITIONS=197} [2024-06-20 16:24:30,150 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-20 16:24:30,150 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 197 transitions, 2107 flow [2024-06-20 16:24:30,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:30,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:30,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:30,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 16:24:30,151 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:24:30,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:30,151 INFO L85 PathProgramCache]: Analyzing trace with hash 317269105, now seen corresponding path program 2 times [2024-06-20 16:24:30,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:30,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384386237] [2024-06-20 16:24:30,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:30,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:30,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:30,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:30,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:30,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384386237] [2024-06-20 16:24:30,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384386237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:30,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:30,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:24:30,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427232156] [2024-06-20 16:24:30,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:30,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:24:30,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:30,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:24:30,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:24:30,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:30,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 197 transitions, 2107 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 16:24:30,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:30,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:30,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:31,738 INFO L124 PetriNetUnfolderBase]: 2699/4318 cut-off events. [2024-06-20 16:24:31,738 INFO L125 PetriNetUnfolderBase]: For 290870/290910 co-relation queries the response was YES. [2024-06-20 16:24:31,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31050 conditions, 4318 events. 2699/4318 cut-off events. For 290870/290910 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 24781 event pairs, 825 based on Foata normal form. 21/4284 useless extension candidates. Maximal degree in co-relation 30968. Up to 4033 conditions per place. [2024-06-20 16:24:31,782 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 145 selfloop transitions, 39 changer transitions 0/213 dead transitions. [2024-06-20 16:24:31,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 213 transitions, 2693 flow [2024-06-20 16:24:31,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:24:31,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:24:31,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-20 16:24:31,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-20 16:24:31,784 INFO L175 Difference]: Start difference. First operand has 175 places, 197 transitions, 2107 flow. Second operand 7 states and 116 transitions. [2024-06-20 16:24:31,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 213 transitions, 2693 flow [2024-06-20 16:24:32,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 213 transitions, 2369 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-20 16:24:32,288 INFO L231 Difference]: Finished difference. Result has 173 places, 203 transitions, 1961 flow [2024-06-20 16:24:32,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1783, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1961, PETRI_PLACES=173, PETRI_TRANSITIONS=203} [2024-06-20 16:24:32,289 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-20 16:24:32,289 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 203 transitions, 1961 flow [2024-06-20 16:24:32,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 16:24:32,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:32,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:32,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 16:24:32,290 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:24:32,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:32,290 INFO L85 PathProgramCache]: Analyzing trace with hash 316853395, now seen corresponding path program 3 times [2024-06-20 16:24:32,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:32,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418487208] [2024-06-20 16:24:32,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:32,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:33,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:33,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:33,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418487208] [2024-06-20 16:24:33,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418487208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:33,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:33,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:24:33,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354564825] [2024-06-20 16:24:33,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:33,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:24:33,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:33,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:24:33,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:24:33,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:33,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 203 transitions, 1961 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 16:24:33,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:33,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:33,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:33,870 INFO L124 PetriNetUnfolderBase]: 2695/4311 cut-off events. [2024-06-20 16:24:33,870 INFO L125 PetriNetUnfolderBase]: For 294662/294702 co-relation queries the response was YES. [2024-06-20 16:24:33,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30334 conditions, 4311 events. 2695/4311 cut-off events. For 294662/294702 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 24742 event pairs, 824 based on Foata normal form. 20/4277 useless extension candidates. Maximal degree in co-relation 30253. Up to 4030 conditions per place. [2024-06-20 16:24:33,907 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 145 selfloop transitions, 38 changer transitions 0/212 dead transitions. [2024-06-20 16:24:33,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 212 transitions, 2353 flow [2024-06-20 16:24:33,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:24:33,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:24:33,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-20 16:24:33,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-20 16:24:33,908 INFO L175 Difference]: Start difference. First operand has 173 places, 203 transitions, 1961 flow. Second operand 7 states and 116 transitions. [2024-06-20 16:24:33,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 212 transitions, 2353 flow [2024-06-20 16:24:34,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 212 transitions, 2252 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-20 16:24:34,330 INFO L231 Difference]: Finished difference. Result has 177 places, 203 transitions, 1942 flow [2024-06-20 16:24:34,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1860, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1942, PETRI_PLACES=177, PETRI_TRANSITIONS=203} [2024-06-20 16:24:34,331 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-20 16:24:34,331 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 203 transitions, 1942 flow [2024-06-20 16:24:34,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 16:24:34,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:34,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:34,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 16:24:34,332 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:24:34,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:34,332 INFO L85 PathProgramCache]: Analyzing trace with hash 358190217, now seen corresponding path program 1 times [2024-06-20 16:24:34,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:34,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586806913] [2024-06-20 16:24:34,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:34,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:34,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:35,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:35,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:35,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586806913] [2024-06-20 16:24:35,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586806913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:35,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:35,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:24:35,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704536255] [2024-06-20 16:24:35,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:35,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:24:35,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:35,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:24:35,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:24:35,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 16:24:35,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 203 transitions, 1942 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-20 16:24:35,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:35,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 16:24:35,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:35,905 INFO L124 PetriNetUnfolderBase]: 2617/4264 cut-off events. [2024-06-20 16:24:35,906 INFO L125 PetriNetUnfolderBase]: For 263530/263530 co-relation queries the response was YES. [2024-06-20 16:24:35,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28916 conditions, 4264 events. 2617/4264 cut-off events. For 263530/263530 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 24847 event pairs, 752 based on Foata normal form. 2/4265 useless extension candidates. Maximal degree in co-relation 28833. Up to 3964 conditions per place. [2024-06-20 16:24:35,944 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 197 selfloop transitions, 18 changer transitions 0/225 dead transitions. [2024-06-20 16:24:35,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 225 transitions, 2489 flow [2024-06-20 16:24:35,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:24:35,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:24:35,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-20 16:24:35,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:24:35,946 INFO L175 Difference]: Start difference. First operand has 177 places, 203 transitions, 1942 flow. Second operand 7 states and 126 transitions. [2024-06-20 16:24:35,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 225 transitions, 2489 flow [2024-06-20 16:24:36,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 225 transitions, 2395 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 16:24:36,452 INFO L231 Difference]: Finished difference. Result has 179 places, 209 transitions, 1967 flow [2024-06-20 16:24:36,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1848, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1967, PETRI_PLACES=179, PETRI_TRANSITIONS=209} [2024-06-20 16:24:36,452 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-20 16:24:36,453 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 209 transitions, 1967 flow [2024-06-20 16:24:36,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-20 16:24:36,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:36,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:36,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 16:24:36,453 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:24:36,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:36,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1861817783, now seen corresponding path program 2 times [2024-06-20 16:24:36,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:36,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288547645] [2024-06-20 16:24:36,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:36,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:36,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:37,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:37,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:37,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288547645] [2024-06-20 16:24:37,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288547645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:37,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:37,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:24:37,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814376274] [2024-06-20 16:24:37,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:37,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:24:37,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:37,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:24:37,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:24:37,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 16:24:37,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 209 transitions, 1967 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-20 16:24:37,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:37,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 16:24:37,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:37,998 INFO L124 PetriNetUnfolderBase]: 2635/4295 cut-off events. [2024-06-20 16:24:37,998 INFO L125 PetriNetUnfolderBase]: For 274780/274780 co-relation queries the response was YES. [2024-06-20 16:24:38,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29875 conditions, 4295 events. 2635/4295 cut-off events. For 274780/274780 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 25043 event pairs, 734 based on Foata normal form. 2/4296 useless extension candidates. Maximal degree in co-relation 29790. Up to 3976 conditions per place. [2024-06-20 16:24:38,039 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 195 selfloop transitions, 25 changer transitions 0/230 dead transitions. [2024-06-20 16:24:38,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 230 transitions, 2659 flow [2024-06-20 16:24:38,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:24:38,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:24:38,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-20 16:24:38,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-20 16:24:38,040 INFO L175 Difference]: Start difference. First operand has 179 places, 209 transitions, 1967 flow. Second operand 7 states and 127 transitions. [2024-06-20 16:24:38,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 230 transitions, 2659 flow [2024-06-20 16:24:38,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 230 transitions, 2603 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-20 16:24:38,657 INFO L231 Difference]: Finished difference. Result has 183 places, 215 transitions, 2069 flow [2024-06-20 16:24:38,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1911, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2069, PETRI_PLACES=183, PETRI_TRANSITIONS=215} [2024-06-20 16:24:38,657 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-20 16:24:38,658 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 215 transitions, 2069 flow [2024-06-20 16:24:38,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-20 16:24:38,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:38,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:38,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 16:24:38,658 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:24:38,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:38,659 INFO L85 PathProgramCache]: Analyzing trace with hash 358195053, now seen corresponding path program 1 times [2024-06-20 16:24:38,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:38,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618479054] [2024-06-20 16:24:38,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:38,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:39,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:39,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:39,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618479054] [2024-06-20 16:24:39,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618479054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:39,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:39,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:24:39,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103816760] [2024-06-20 16:24:39,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:39,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:24:39,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:39,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:24:39,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:24:39,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:39,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 215 transitions, 2069 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 16:24:39,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:39,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:39,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:40,230 INFO L124 PetriNetUnfolderBase]: 2736/4398 cut-off events. [2024-06-20 16:24:40,230 INFO L125 PetriNetUnfolderBase]: For 283980/283980 co-relation queries the response was YES. [2024-06-20 16:24:40,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30962 conditions, 4398 events. 2736/4398 cut-off events. For 283980/283980 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 25231 event pairs, 768 based on Foata normal form. 1/4398 useless extension candidates. Maximal degree in co-relation 30876. Up to 4203 conditions per place. [2024-06-20 16:24:40,276 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 210 selfloop transitions, 15 changer transitions 0/230 dead transitions. [2024-06-20 16:24:40,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 230 transitions, 2609 flow [2024-06-20 16:24:40,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:24:40,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:24:40,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-20 16:24:40,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-20 16:24:40,277 INFO L175 Difference]: Start difference. First operand has 183 places, 215 transitions, 2069 flow. Second operand 7 states and 115 transitions. [2024-06-20 16:24:40,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 230 transitions, 2609 flow [2024-06-20 16:24:40,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 230 transitions, 2548 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-20 16:24:40,964 INFO L231 Difference]: Finished difference. Result has 187 places, 218 transitions, 2102 flow [2024-06-20 16:24:40,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2008, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2102, PETRI_PLACES=187, PETRI_TRANSITIONS=218} [2024-06-20 16:24:40,965 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-20 16:24:40,965 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 218 transitions, 2102 flow [2024-06-20 16:24:40,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 16:24:40,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:40,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:40,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 16:24:40,966 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:24:40,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:40,966 INFO L85 PathProgramCache]: Analyzing trace with hash 2039186639, now seen corresponding path program 2 times [2024-06-20 16:24:40,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:40,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038421053] [2024-06-20 16:24:40,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:40,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:41,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:41,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038421053] [2024-06-20 16:24:41,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038421053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:41,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:41,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:24:41,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070146571] [2024-06-20 16:24:41,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:41,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:24:41,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:41,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:24:41,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:24:41,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:41,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 218 transitions, 2102 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 16:24:41,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:41,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:41,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:42,507 INFO L124 PetriNetUnfolderBase]: 2741/4406 cut-off events. [2024-06-20 16:24:42,508 INFO L125 PetriNetUnfolderBase]: For 293385/293389 co-relation queries the response was YES. [2024-06-20 16:24:42,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31428 conditions, 4406 events. 2741/4406 cut-off events. For 293385/293389 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 25285 event pairs, 772 based on Foata normal form. 5/4410 useless extension candidates. Maximal degree in co-relation 31340. Up to 4194 conditions per place. [2024-06-20 16:24:42,547 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 201 selfloop transitions, 28 changer transitions 0/234 dead transitions. [2024-06-20 16:24:42,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 234 transitions, 2816 flow [2024-06-20 16:24:42,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:24:42,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:24:42,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-20 16:24:42,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-20 16:24:42,549 INFO L175 Difference]: Start difference. First operand has 187 places, 218 transitions, 2102 flow. Second operand 7 states and 116 transitions. [2024-06-20 16:24:42,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 234 transitions, 2816 flow [2024-06-20 16:24:43,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 234 transitions, 2744 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 16:24:43,079 INFO L231 Difference]: Finished difference. Result has 189 places, 224 transitions, 2214 flow [2024-06-20 16:24:43,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2030, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2214, PETRI_PLACES=189, PETRI_TRANSITIONS=224} [2024-06-20 16:24:43,079 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-20 16:24:43,079 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 224 transitions, 2214 flow [2024-06-20 16:24:43,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 16:24:43,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:43,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:43,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 16:24:43,080 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:24:43,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:43,082 INFO L85 PathProgramCache]: Analyzing trace with hash 2038949303, now seen corresponding path program 3 times [2024-06-20 16:24:43,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:43,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648367792] [2024-06-20 16:24:43,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:43,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:43,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:43,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:43,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:43,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648367792] [2024-06-20 16:24:43,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648367792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:43,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:43,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:24:43,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116044659] [2024-06-20 16:24:43,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:43,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:24:43,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:43,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:24:43,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:24:43,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 16:24:43,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 224 transitions, 2214 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-20 16:24:43,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:43,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 16:24:43,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:44,679 INFO L124 PetriNetUnfolderBase]: 2649/4313 cut-off events. [2024-06-20 16:24:44,679 INFO L125 PetriNetUnfolderBase]: For 304620/304622 co-relation queries the response was YES. [2024-06-20 16:24:44,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31254 conditions, 4313 events. 2649/4313 cut-off events. For 304620/304622 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 25154 event pairs, 744 based on Foata normal form. 2/4314 useless extension candidates. Maximal degree in co-relation 31165. Up to 3976 conditions per place. [2024-06-20 16:24:44,724 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 194 selfloop transitions, 32 changer transitions 0/239 dead transitions. [2024-06-20 16:24:44,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 239 transitions, 2874 flow [2024-06-20 16:24:44,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:24:44,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:24:44,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-20 16:24:44,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:24:44,725 INFO L175 Difference]: Start difference. First operand has 189 places, 224 transitions, 2214 flow. Second operand 7 states and 126 transitions. [2024-06-20 16:24:44,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 239 transitions, 2874 flow [2024-06-20 16:24:45,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 239 transitions, 2795 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-20 16:24:45,248 INFO L231 Difference]: Finished difference. Result has 193 places, 227 transitions, 2269 flow [2024-06-20 16:24:45,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2135, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2269, PETRI_PLACES=193, PETRI_TRANSITIONS=227} [2024-06-20 16:24:45,248 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-20 16:24:45,248 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 227 transitions, 2269 flow [2024-06-20 16:24:45,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-20 16:24:45,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:45,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:45,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 16:24:45,249 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:24:45,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:45,249 INFO L85 PathProgramCache]: Analyzing trace with hash 317037907, now seen corresponding path program 3 times [2024-06-20 16:24:45,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:45,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578357242] [2024-06-20 16:24:45,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:45,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:45,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:46,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:46,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578357242] [2024-06-20 16:24:46,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578357242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:46,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:46,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:24:46,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275910332] [2024-06-20 16:24:46,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:46,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:24:46,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:46,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:24:46,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:24:46,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:46,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 227 transitions, 2269 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 16:24:46,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:46,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:46,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:46,903 INFO L124 PetriNetUnfolderBase]: 2732/4394 cut-off events. [2024-06-20 16:24:46,904 INFO L125 PetriNetUnfolderBase]: For 308623/308627 co-relation queries the response was YES. [2024-06-20 16:24:46,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32129 conditions, 4394 events. 2732/4394 cut-off events. For 308623/308627 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 25227 event pairs, 771 based on Foata normal form. 5/4398 useless extension candidates. Maximal degree in co-relation 32038. Up to 4183 conditions per place. [2024-06-20 16:24:46,946 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 204 selfloop transitions, 27 changer transitions 0/236 dead transitions. [2024-06-20 16:24:46,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 236 transitions, 2757 flow [2024-06-20 16:24:46,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:24:46,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:24:46,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-20 16:24:46,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-20 16:24:46,947 INFO L175 Difference]: Start difference. First operand has 193 places, 227 transitions, 2269 flow. Second operand 7 states and 116 transitions. [2024-06-20 16:24:46,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 236 transitions, 2757 flow [2024-06-20 16:24:47,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 236 transitions, 2613 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-20 16:24:47,312 INFO L231 Difference]: Finished difference. Result has 195 places, 227 transitions, 2185 flow [2024-06-20 16:24:47,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2125, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2185, PETRI_PLACES=195, PETRI_TRANSITIONS=227} [2024-06-20 16:24:47,313 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-20 16:24:47,313 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 227 transitions, 2185 flow [2024-06-20 16:24:47,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 16:24:47,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:47,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:47,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 16:24:47,314 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:24:47,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:47,314 INFO L85 PathProgramCache]: Analyzing trace with hash 674231736, now seen corresponding path program 1 times [2024-06-20 16:24:47,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:47,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747172713] [2024-06-20 16:24:47,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:47,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:47,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:48,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:48,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:48,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747172713] [2024-06-20 16:24:48,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747172713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:48,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:48,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:24:48,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34585231] [2024-06-20 16:24:48,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:48,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:24:48,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:48,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:24:48,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:24:48,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:48,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 227 transitions, 2185 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 16:24:48,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:48,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:48,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:48,998 INFO L124 PetriNetUnfolderBase]: 2855/4549 cut-off events. [2024-06-20 16:24:48,999 INFO L125 PetriNetUnfolderBase]: For 376706/376710 co-relation queries the response was YES. [2024-06-20 16:24:49,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34920 conditions, 4549 events. 2855/4549 cut-off events. For 376706/376710 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25999 event pairs, 769 based on Foata normal form. 5/4553 useless extension candidates. Maximal degree in co-relation 34828. Up to 4255 conditions per place. [2024-06-20 16:24:49,042 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 200 selfloop transitions, 37 changer transitions 0/249 dead transitions. [2024-06-20 16:24:49,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 249 transitions, 2785 flow [2024-06-20 16:24:49,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:24:49,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:24:49,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-20 16:24:49,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-20 16:24:49,043 INFO L175 Difference]: Start difference. First operand has 195 places, 227 transitions, 2185 flow. Second operand 7 states and 123 transitions. [2024-06-20 16:24:49,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 249 transitions, 2785 flow [2024-06-20 16:24:49,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 249 transitions, 2711 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 16:24:49,478 INFO L231 Difference]: Finished difference. Result has 196 places, 230 transitions, 2256 flow [2024-06-20 16:24:49,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2111, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2256, PETRI_PLACES=196, PETRI_TRANSITIONS=230} [2024-06-20 16:24:49,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-20 16:24:49,478 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 230 transitions, 2256 flow [2024-06-20 16:24:49,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 16:24:49,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:49,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:49,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 16:24:49,479 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:24:49,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:49,479 INFO L85 PathProgramCache]: Analyzing trace with hash 679945656, now seen corresponding path program 2 times [2024-06-20 16:24:49,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:49,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070402184] [2024-06-20 16:24:49,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:49,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:49,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:50,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:50,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:50,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070402184] [2024-06-20 16:24:50,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070402184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:50,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:50,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:24:50,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135201014] [2024-06-20 16:24:50,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:50,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:24:50,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:50,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:24:50,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:24:50,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:50,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 230 transitions, 2256 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 16:24:50,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:50,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:50,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:51,151 INFO L124 PetriNetUnfolderBase]: 2868/4566 cut-off events. [2024-06-20 16:24:51,152 INFO L125 PetriNetUnfolderBase]: For 391393/391397 co-relation queries the response was YES. [2024-06-20 16:24:51,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35698 conditions, 4566 events. 2868/4566 cut-off events. For 391393/391397 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 26103 event pairs, 773 based on Foata normal form. 5/4570 useless extension candidates. Maximal degree in co-relation 35605. Up to 4257 conditions per place. [2024-06-20 16:24:51,201 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 200 selfloop transitions, 42 changer transitions 0/254 dead transitions. [2024-06-20 16:24:51,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 254 transitions, 3048 flow [2024-06-20 16:24:51,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:24:51,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:24:51,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 16:24:51,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-20 16:24:51,203 INFO L175 Difference]: Start difference. First operand has 196 places, 230 transitions, 2256 flow. Second operand 7 states and 122 transitions. [2024-06-20 16:24:51,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 254 transitions, 3048 flow [2024-06-20 16:24:51,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 254 transitions, 2931 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-20 16:24:51,716 INFO L231 Difference]: Finished difference. Result has 199 places, 238 transitions, 2391 flow [2024-06-20 16:24:51,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2139, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2391, PETRI_PLACES=199, PETRI_TRANSITIONS=238} [2024-06-20 16:24:51,717 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-20 16:24:51,717 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 238 transitions, 2391 flow [2024-06-20 16:24:51,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 16:24:51,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:51,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:51,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 16:24:51,718 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:24:51,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:51,718 INFO L85 PathProgramCache]: Analyzing trace with hash 679953592, now seen corresponding path program 1 times [2024-06-20 16:24:51,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:51,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737135454] [2024-06-20 16:24:51,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:51,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:51,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:52,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:52,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:52,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737135454] [2024-06-20 16:24:52,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737135454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:52,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:52,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:24:52,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043984966] [2024-06-20 16:24:52,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:52,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:24:52,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:52,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:24:52,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:24:52,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:52,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 238 transitions, 2391 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:52,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:52,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:52,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:53,417 INFO L124 PetriNetUnfolderBase]: 2762/4414 cut-off events. [2024-06-20 16:24:53,418 INFO L125 PetriNetUnfolderBase]: For 400614/400644 co-relation queries the response was YES. [2024-06-20 16:24:53,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35197 conditions, 4414 events. 2762/4414 cut-off events. For 400614/400644 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25292 event pairs, 776 based on Foata normal form. 18/4391 useless extension candidates. Maximal degree in co-relation 35102. Up to 4095 conditions per place. [2024-06-20 16:24:53,464 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 192 selfloop transitions, 32 changer transitions 0/256 dead transitions. [2024-06-20 16:24:53,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 256 transitions, 2929 flow [2024-06-20 16:24:53,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:24:53,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:24:53,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 16:24:53,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-20 16:24:53,465 INFO L175 Difference]: Start difference. First operand has 199 places, 238 transitions, 2391 flow. Second operand 8 states and 131 transitions. [2024-06-20 16:24:53,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 256 transitions, 2929 flow [2024-06-20 16:24:54,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 256 transitions, 2791 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-20 16:24:54,234 INFO L231 Difference]: Finished difference. Result has 203 places, 241 transitions, 2373 flow [2024-06-20 16:24:54,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2253, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2373, PETRI_PLACES=203, PETRI_TRANSITIONS=241} [2024-06-20 16:24:54,235 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-20 16:24:54,235 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 241 transitions, 2373 flow [2024-06-20 16:24:54,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:54,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:54,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:54,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 16:24:54,236 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)] === [2024-06-20 16:24:54,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:54,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1942255734, now seen corresponding path program 3 times [2024-06-20 16:24:54,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:54,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362072838] [2024-06-20 16:24:54,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:54,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:54,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:54,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:54,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362072838] [2024-06-20 16:24:54,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362072838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:54,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:54,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:24:54,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375511846] [2024-06-20 16:24:54,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:54,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:24:54,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:54,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:24:54,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:24:55,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:55,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 241 transitions, 2373 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 16:24:55,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:55,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:55,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:55,854 INFO L124 PetriNetUnfolderBase]: 2875/4579 cut-off events. [2024-06-20 16:24:55,855 INFO L125 PetriNetUnfolderBase]: For 411356/411358 co-relation queries the response was YES. [2024-06-20 16:24:55,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36491 conditions, 4579 events. 2875/4579 cut-off events. For 411356/411358 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 26107 event pairs, 769 based on Foata normal form. 3/4581 useless extension candidates. Maximal degree in co-relation 36395. Up to 4287 conditions per place. [2024-06-20 16:24:55,904 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 210 selfloop transitions, 36 changer transitions 0/258 dead transitions. [2024-06-20 16:24:55,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 258 transitions, 2936 flow [2024-06-20 16:24:55,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:24:55,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:24:55,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 16:24:55,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-20 16:24:55,906 INFO L175 Difference]: Start difference. First operand has 203 places, 241 transitions, 2373 flow. Second operand 7 states and 120 transitions. [2024-06-20 16:24:55,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 258 transitions, 2936 flow [2024-06-20 16:24:56,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 258 transitions, 2800 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-20 16:24:56,520 INFO L231 Difference]: Finished difference. Result has 204 places, 242 transitions, 2331 flow [2024-06-20 16:24:56,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2243, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2331, PETRI_PLACES=204, PETRI_TRANSITIONS=242} [2024-06-20 16:24:56,522 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-20 16:24:56,523 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 242 transitions, 2331 flow [2024-06-20 16:24:56,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 16:24:56,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:56,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:56,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 16:24:56,523 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)] === [2024-06-20 16:24:56,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:56,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1780868036, now seen corresponding path program 4 times [2024-06-20 16:24:56,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:56,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136583962] [2024-06-20 16:24:56,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:56,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:56,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:57,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:57,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:57,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136583962] [2024-06-20 16:24:57,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136583962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:57,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:57,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:24:57,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365234180] [2024-06-20 16:24:57,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:57,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:24:57,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:57,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:24:57,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:24:57,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:57,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 242 transitions, 2331 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 16:24:57,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:57,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:57,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:58,252 INFO L124 PetriNetUnfolderBase]: 2880/4584 cut-off events. [2024-06-20 16:24:58,252 INFO L125 PetriNetUnfolderBase]: For 423361/423363 co-relation queries the response was YES. [2024-06-20 16:24:58,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36693 conditions, 4584 events. 2880/4584 cut-off events. For 423361/423363 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 26126 event pairs, 767 based on Foata normal form. 3/4586 useless extension candidates. Maximal degree in co-relation 36596. Up to 4279 conditions per place. [2024-06-20 16:24:58,304 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 200 selfloop transitions, 46 changer transitions 0/258 dead transitions. [2024-06-20 16:24:58,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 258 transitions, 2932 flow [2024-06-20 16:24:58,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:24:58,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:24:58,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-20 16:24:58,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-20 16:24:58,306 INFO L175 Difference]: Start difference. First operand has 204 places, 242 transitions, 2331 flow. Second operand 8 states and 129 transitions. [2024-06-20 16:24:58,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 258 transitions, 2932 flow [2024-06-20 16:24:59,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 258 transitions, 2857 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 16:24:59,025 INFO L231 Difference]: Finished difference. Result has 207 places, 245 transitions, 2424 flow [2024-06-20 16:24:59,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2256, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2424, PETRI_PLACES=207, PETRI_TRANSITIONS=245} [2024-06-20 16:24:59,025 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-20 16:24:59,025 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 245 transitions, 2424 flow [2024-06-20 16:24:59,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 16:24:59,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:59,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:59,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 16:24:59,026 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)] === [2024-06-20 16:24:59,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:59,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1232663544, now seen corresponding path program 5 times [2024-06-20 16:24:59,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:59,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865685422] [2024-06-20 16:24:59,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:59,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:59,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:59,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:59,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865685422] [2024-06-20 16:24:59,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865685422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:59,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:59,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:24:59,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323201043] [2024-06-20 16:24:59,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:59,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:24:59,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:59,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:24:59,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:24:59,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:59,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 245 transitions, 2424 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 16:24:59,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:59,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:59,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:00,644 INFO L124 PetriNetUnfolderBase]: 2885/4595 cut-off events. [2024-06-20 16:25:00,645 INFO L125 PetriNetUnfolderBase]: For 437006/437012 co-relation queries the response was YES. [2024-06-20 16:25:00,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37281 conditions, 4595 events. 2885/4595 cut-off events. For 437006/437012 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 26235 event pairs, 781 based on Foata normal form. 7/4601 useless extension candidates. Maximal degree in co-relation 37183. Up to 4260 conditions per place. [2024-06-20 16:25:00,694 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 194 selfloop transitions, 59 changer transitions 0/265 dead transitions. [2024-06-20 16:25:00,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 265 transitions, 3262 flow [2024-06-20 16:25:00,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:25:00,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:25:00,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-20 16:25:00,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-20 16:25:00,695 INFO L175 Difference]: Start difference. First operand has 207 places, 245 transitions, 2424 flow. Second operand 7 states and 118 transitions. [2024-06-20 16:25:00,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 265 transitions, 3262 flow [2024-06-20 16:25:01,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 265 transitions, 3129 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-20 16:25:01,455 INFO L231 Difference]: Finished difference. Result has 210 places, 254 transitions, 2624 flow [2024-06-20 16:25:01,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2291, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2624, PETRI_PLACES=210, PETRI_TRANSITIONS=254} [2024-06-20 16:25:01,455 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-20 16:25:01,456 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 254 transitions, 2624 flow [2024-06-20 16:25:01,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 16:25:01,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:01,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:01,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 16:25:01,456 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)] === [2024-06-20 16:25:01,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:01,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1232513814, now seen corresponding path program 6 times [2024-06-20 16:25:01,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:01,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821513997] [2024-06-20 16:25:01,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:01,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:01,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:02,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:02,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:02,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821513997] [2024-06-20 16:25:02,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821513997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:02,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:02,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:25:02,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211728237] [2024-06-20 16:25:02,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:02,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:25:02,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:02,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:25:02,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:25:02,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:02,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 254 transitions, 2624 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 16:25:02,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:02,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:02,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:03,248 INFO L124 PetriNetUnfolderBase]: 2880/4591 cut-off events. [2024-06-20 16:25:03,248 INFO L125 PetriNetUnfolderBase]: For 449885/449891 co-relation queries the response was YES. [2024-06-20 16:25:03,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37663 conditions, 4591 events. 2880/4591 cut-off events. For 449885/449891 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 26245 event pairs, 781 based on Foata normal form. 7/4597 useless extension candidates. Maximal degree in co-relation 37563. Up to 4257 conditions per place. [2024-06-20 16:25:03,299 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 193 selfloop transitions, 59 changer transitions 0/264 dead transitions. [2024-06-20 16:25:03,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 264 transitions, 3161 flow [2024-06-20 16:25:03,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:25:03,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:25:03,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-20 16:25:03,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-20 16:25:03,300 INFO L175 Difference]: Start difference. First operand has 210 places, 254 transitions, 2624 flow. Second operand 7 states and 117 transitions. [2024-06-20 16:25:03,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 264 transitions, 3161 flow [2024-06-20 16:25:03,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 264 transitions, 3000 flow, removed 66 selfloop flow, removed 2 redundant places. [2024-06-20 16:25:03,954 INFO L231 Difference]: Finished difference. Result has 215 places, 254 transitions, 2587 flow [2024-06-20 16:25:03,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2463, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2587, PETRI_PLACES=215, PETRI_TRANSITIONS=254} [2024-06-20 16:25:03,955 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-20 16:25:03,955 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 254 transitions, 2587 flow [2024-06-20 16:25:03,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 16:25:03,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:03,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:03,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 16:25:03,955 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)] === [2024-06-20 16:25:03,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:03,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1209461576, now seen corresponding path program 2 times [2024-06-20 16:25:03,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:03,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849709673] [2024-06-20 16:25:03,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:03,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:03,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:04,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:04,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849709673] [2024-06-20 16:25:04,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849709673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:04,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:04,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:04,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439591301] [2024-06-20 16:25:04,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:04,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:04,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:04,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:04,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:04,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:04,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 254 transitions, 2587 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:04,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:04,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:04,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:05,721 INFO L124 PetriNetUnfolderBase]: 2784/4438 cut-off events. [2024-06-20 16:25:05,721 INFO L125 PetriNetUnfolderBase]: For 460193/460232 co-relation queries the response was YES. [2024-06-20 16:25:05,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36694 conditions, 4438 events. 2784/4438 cut-off events. For 460193/460232 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25386 event pairs, 781 based on Foata normal form. 21/4412 useless extension candidates. Maximal degree in co-relation 36592. Up to 4086 conditions per place. [2024-06-20 16:25:05,777 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 183 selfloop transitions, 53 changer transitions 0/273 dead transitions. [2024-06-20 16:25:05,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 273 transitions, 3329 flow [2024-06-20 16:25:05,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:25:05,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:25:05,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 16:25:05,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-20 16:25:05,779 INFO L175 Difference]: Start difference. First operand has 215 places, 254 transitions, 2587 flow. Second operand 8 states and 130 transitions. [2024-06-20 16:25:05,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 273 transitions, 3329 flow [2024-06-20 16:25:06,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 273 transitions, 3170 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 16:25:06,411 INFO L231 Difference]: Finished difference. Result has 218 places, 262 transitions, 2670 flow [2024-06-20 16:25:06,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2428, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2670, PETRI_PLACES=218, PETRI_TRANSITIONS=262} [2024-06-20 16:25:06,412 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-20 16:25:06,412 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 262 transitions, 2670 flow [2024-06-20 16:25:06,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:06,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:06,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:06,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 16:25:06,413 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)] === [2024-06-20 16:25:06,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:06,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1209907046, now seen corresponding path program 3 times [2024-06-20 16:25:06,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:06,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270244203] [2024-06-20 16:25:06,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:06,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:06,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:07,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:07,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:07,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270244203] [2024-06-20 16:25:07,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270244203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:07,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:07,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:07,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104664172] [2024-06-20 16:25:07,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:07,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:07,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:07,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:07,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:07,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:07,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 262 transitions, 2670 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:07,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:07,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:07,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:08,201 INFO L124 PetriNetUnfolderBase]: 2778/4434 cut-off events. [2024-06-20 16:25:08,201 INFO L125 PetriNetUnfolderBase]: For 474099/474150 co-relation queries the response was YES. [2024-06-20 16:25:08,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37151 conditions, 4434 events. 2778/4434 cut-off events. For 474099/474150 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25410 event pairs, 781 based on Foata normal form. 20/4407 useless extension candidates. Maximal degree in co-relation 37048. Up to 4084 conditions per place. [2024-06-20 16:25:08,251 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 185 selfloop transitions, 54 changer transitions 0/276 dead transitions. [2024-06-20 16:25:08,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 276 transitions, 3371 flow [2024-06-20 16:25:08,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:25:08,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:25:08,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 16:25:08,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-20 16:25:08,253 INFO L175 Difference]: Start difference. First operand has 218 places, 262 transitions, 2670 flow. Second operand 8 states and 131 transitions. [2024-06-20 16:25:08,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 276 transitions, 3371 flow [2024-06-20 16:25:09,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 276 transitions, 3256 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-20 16:25:09,060 INFO L231 Difference]: Finished difference. Result has 222 places, 265 transitions, 2728 flow [2024-06-20 16:25:09,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2563, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2728, PETRI_PLACES=222, PETRI_TRANSITIONS=265} [2024-06-20 16:25:09,061 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-20 16:25:09,061 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 265 transitions, 2728 flow [2024-06-20 16:25:09,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:09,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:09,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:09,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 16:25:09,061 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)] === [2024-06-20 16:25:09,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:09,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1232521750, now seen corresponding path program 4 times [2024-06-20 16:25:09,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:09,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626501868] [2024-06-20 16:25:09,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:09,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:09,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:09,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:09,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:09,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626501868] [2024-06-20 16:25:09,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626501868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:09,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:09,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:09,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587709497] [2024-06-20 16:25:09,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:09,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:09,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:09,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:09,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:09,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:09,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 265 transitions, 2728 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:09,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:09,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:10,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:10,755 INFO L124 PetriNetUnfolderBase]: 2774/4427 cut-off events. [2024-06-20 16:25:10,755 INFO L125 PetriNetUnfolderBase]: For 482377/482420 co-relation queries the response was YES. [2024-06-20 16:25:10,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37240 conditions, 4427 events. 2774/4427 cut-off events. For 482377/482420 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 25382 event pairs, 780 based on Foata normal form. 20/4401 useless extension candidates. Maximal degree in co-relation 37135. Up to 4081 conditions per place. [2024-06-20 16:25:10,805 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 186 selfloop transitions, 53 changer transitions 0/276 dead transitions. [2024-06-20 16:25:10,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 276 transitions, 3243 flow [2024-06-20 16:25:10,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:25:10,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:25:10,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 16:25:10,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-20 16:25:10,807 INFO L175 Difference]: Start difference. First operand has 222 places, 265 transitions, 2728 flow. Second operand 8 states and 131 transitions. [2024-06-20 16:25:10,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 276 transitions, 3243 flow [2024-06-20 16:25:11,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 276 transitions, 3093 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-20 16:25:11,427 INFO L231 Difference]: Finished difference. Result has 225 places, 266 transitions, 2699 flow [2024-06-20 16:25:11,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2579, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2699, PETRI_PLACES=225, PETRI_TRANSITIONS=266} [2024-06-20 16:25:11,441 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-20 16:25:11,444 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 266 transitions, 2699 flow [2024-06-20 16:25:11,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:11,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:11,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:11,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 16:25:11,444 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)] === [2024-06-20 16:25:11,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:11,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1878054546, now seen corresponding path program 1 times [2024-06-20 16:25:11,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:11,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862339921] [2024-06-20 16:25:11,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:11,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:11,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:12,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:12,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:12,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862339921] [2024-06-20 16:25:12,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862339921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:12,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:12,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:12,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326333330] [2024-06-20 16:25:12,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:12,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:12,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:12,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:12,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:12,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 16:25:12,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 266 transitions, 2699 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:12,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:12,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 16:25:12,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:13,558 INFO L124 PetriNetUnfolderBase]: 2777/4485 cut-off events. [2024-06-20 16:25:13,558 INFO L125 PetriNetUnfolderBase]: For 494021/494021 co-relation queries the response was YES. [2024-06-20 16:25:13,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37612 conditions, 4485 events. 2777/4485 cut-off events. For 494021/494021 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 26042 event pairs, 773 based on Foata normal form. 1/4481 useless extension candidates. Maximal degree in co-relation 37506. Up to 4138 conditions per place. [2024-06-20 16:25:13,613 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 244 selfloop transitions, 20 changer transitions 0/282 dead transitions. [2024-06-20 16:25:13,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 282 transitions, 3281 flow [2024-06-20 16:25:13,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:25:13,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:25:13,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-20 16:25:13,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:25:13,615 INFO L175 Difference]: Start difference. First operand has 225 places, 266 transitions, 2699 flow. Second operand 7 states and 126 transitions. [2024-06-20 16:25:13,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 282 transitions, 3281 flow [2024-06-20 16:25:14,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 282 transitions, 3165 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 16:25:14,321 INFO L231 Difference]: Finished difference. Result has 227 places, 266 transitions, 2633 flow [2024-06-20 16:25:14,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2583, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2633, PETRI_PLACES=227, PETRI_TRANSITIONS=266} [2024-06-20 16:25:14,321 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-20 16:25:14,322 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 266 transitions, 2633 flow [2024-06-20 16:25:14,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:14,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:14,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:14,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 16:25:14,322 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)] === [2024-06-20 16:25:14,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:14,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1878058421, now seen corresponding path program 1 times [2024-06-20 16:25:14,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:14,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441634247] [2024-06-20 16:25:14,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:14,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:15,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:15,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:15,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441634247] [2024-06-20 16:25:15,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441634247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:15,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:15,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:15,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805801430] [2024-06-20 16:25:15,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:15,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:15,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:15,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:15,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:15,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:15,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 266 transitions, 2633 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:15,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:15,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:15,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:16,124 INFO L124 PetriNetUnfolderBase]: 2883/4599 cut-off events. [2024-06-20 16:25:16,124 INFO L125 PetriNetUnfolderBase]: For 508534/508534 co-relation queries the response was YES. [2024-06-20 16:25:16,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38357 conditions, 4599 events. 2883/4599 cut-off events. For 508534/508534 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 26273 event pairs, 810 based on Foata normal form. 2/4600 useless extension candidates. Maximal degree in co-relation 38250. Up to 4337 conditions per place. [2024-06-20 16:25:16,176 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 256 selfloop transitions, 21 changer transitions 0/287 dead transitions. [2024-06-20 16:25:16,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 287 transitions, 3305 flow [2024-06-20 16:25:16,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:25:16,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:25:16,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 16:25:16,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-20 16:25:16,177 INFO L175 Difference]: Start difference. First operand has 227 places, 266 transitions, 2633 flow. Second operand 8 states and 134 transitions. [2024-06-20 16:25:16,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 287 transitions, 3305 flow [2024-06-20 16:25:17,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 287 transitions, 3257 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 16:25:17,156 INFO L231 Difference]: Finished difference. Result has 229 places, 269 transitions, 2697 flow [2024-06-20 16:25:17,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2585, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2697, PETRI_PLACES=229, PETRI_TRANSITIONS=269} [2024-06-20 16:25:17,157 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-20 16:25:17,157 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 269 transitions, 2697 flow [2024-06-20 16:25:17,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:17,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:17,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:17,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 16:25:17,157 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:25:17,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:17,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1881783288, now seen corresponding path program 1 times [2024-06-20 16:25:17,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:17,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106987579] [2024-06-20 16:25:17,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:17,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:17,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:18,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:18,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:18,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106987579] [2024-06-20 16:25:18,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106987579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:18,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:18,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:18,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732673445] [2024-06-20 16:25:18,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:18,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:18,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:18,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:18,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:18,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:18,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 269 transitions, 2697 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:18,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:18,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:18,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:18,951 INFO L124 PetriNetUnfolderBase]: 2888/4608 cut-off events. [2024-06-20 16:25:18,951 INFO L125 PetriNetUnfolderBase]: For 523185/523185 co-relation queries the response was YES. [2024-06-20 16:25:18,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39006 conditions, 4608 events. 2888/4608 cut-off events. For 523185/523185 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 26358 event pairs, 811 based on Foata normal form. 2/4609 useless extension candidates. Maximal degree in co-relation 38898. Up to 4367 conditions per place. [2024-06-20 16:25:19,005 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 257 selfloop transitions, 18 changer transitions 0/285 dead transitions. [2024-06-20 16:25:19,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 285 transitions, 3351 flow [2024-06-20 16:25:19,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:25:19,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:25:19,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-20 16:25:19,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 16:25:19,006 INFO L175 Difference]: Start difference. First operand has 229 places, 269 transitions, 2697 flow. Second operand 8 states and 128 transitions. [2024-06-20 16:25:19,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 285 transitions, 3351 flow [2024-06-20 16:25:20,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 285 transitions, 3261 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-20 16:25:20,026 INFO L231 Difference]: Finished difference. Result has 231 places, 272 transitions, 2719 flow [2024-06-20 16:25:20,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2607, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2719, PETRI_PLACES=231, PETRI_TRANSITIONS=272} [2024-06-20 16:25:20,027 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-20 16:25:20,027 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 272 transitions, 2719 flow [2024-06-20 16:25:20,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:20,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:20,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:20,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 16:25:20,028 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:25:20,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:20,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1881777491, now seen corresponding path program 2 times [2024-06-20 16:25:20,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:20,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757616160] [2024-06-20 16:25:20,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:20,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:20,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:20,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:20,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:20,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757616160] [2024-06-20 16:25:20,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757616160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:20,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:20,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:20,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009318648] [2024-06-20 16:25:20,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:20,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:20,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:20,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:20,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:20,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:20,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 272 transitions, 2719 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:20,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:20,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:20,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:21,741 INFO L124 PetriNetUnfolderBase]: 2922/4655 cut-off events. [2024-06-20 16:25:21,741 INFO L125 PetriNetUnfolderBase]: For 545569/545569 co-relation queries the response was YES. [2024-06-20 16:25:21,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40026 conditions, 4655 events. 2922/4655 cut-off events. For 545569/545569 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 26606 event pairs, 814 based on Foata normal form. 2/4656 useless extension candidates. Maximal degree in co-relation 39917. Up to 4355 conditions per place. [2024-06-20 16:25:21,791 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 252 selfloop transitions, 37 changer transitions 0/299 dead transitions. [2024-06-20 16:25:21,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 299 transitions, 3839 flow [2024-06-20 16:25:21,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:25:21,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:25:21,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 16:25:21,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-20 16:25:21,793 INFO L175 Difference]: Start difference. First operand has 231 places, 272 transitions, 2719 flow. Second operand 8 states and 138 transitions. [2024-06-20 16:25:21,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 299 transitions, 3839 flow [2024-06-20 16:25:22,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 299 transitions, 3749 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-20 16:25:22,729 INFO L231 Difference]: Finished difference. Result has 233 places, 281 transitions, 2913 flow [2024-06-20 16:25:22,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2629, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2913, PETRI_PLACES=233, PETRI_TRANSITIONS=281} [2024-06-20 16:25:22,729 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-20 16:25:22,729 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 281 transitions, 2913 flow [2024-06-20 16:25:22,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:22,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:22,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:22,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 16:25:22,730 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)] === [2024-06-20 16:25:22,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:22,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1881783071, now seen corresponding path program 3 times [2024-06-20 16:25:22,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:22,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402761712] [2024-06-20 16:25:22,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:22,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:22,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:23,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:23,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402761712] [2024-06-20 16:25:23,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402761712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:23,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:23,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:23,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603725942] [2024-06-20 16:25:23,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:23,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:23,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:23,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:23,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:23,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:23,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 281 transitions, 2913 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:23,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:23,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:23,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:24,454 INFO L124 PetriNetUnfolderBase]: 2916/4647 cut-off events. [2024-06-20 16:25:24,454 INFO L125 PetriNetUnfolderBase]: For 557249/557249 co-relation queries the response was YES. [2024-06-20 16:25:24,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40391 conditions, 4647 events. 2916/4647 cut-off events. For 557249/557249 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 26531 event pairs, 811 based on Foata normal form. 2/4648 useless extension candidates. Maximal degree in co-relation 40281. Up to 4350 conditions per place. [2024-06-20 16:25:24,511 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 249 selfloop transitions, 39 changer transitions 0/298 dead transitions. [2024-06-20 16:25:24,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 298 transitions, 3689 flow [2024-06-20 16:25:24,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:25:24,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:25:24,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 16:25:24,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 16:25:24,512 INFO L175 Difference]: Start difference. First operand has 233 places, 281 transitions, 2913 flow. Second operand 8 states and 136 transitions. [2024-06-20 16:25:24,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 298 transitions, 3689 flow [2024-06-20 16:25:25,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 298 transitions, 3552 flow, removed 61 selfloop flow, removed 3 redundant places. [2024-06-20 16:25:25,395 INFO L231 Difference]: Finished difference. Result has 238 places, 281 transitions, 2860 flow [2024-06-20 16:25:25,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2776, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2860, PETRI_PLACES=238, PETRI_TRANSITIONS=281} [2024-06-20 16:25:25,395 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-20 16:25:25,395 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 281 transitions, 2860 flow [2024-06-20 16:25:25,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:25,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:25,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:25,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 16:25:25,396 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)] === [2024-06-20 16:25:25,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:25,396 INFO L85 PathProgramCache]: Analyzing trace with hash 2025668021, now seen corresponding path program 4 times [2024-06-20 16:25:25,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:25,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868276183] [2024-06-20 16:25:25,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:25,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:25,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:26,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:26,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:26,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868276183] [2024-06-20 16:25:26,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868276183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:26,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:26,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:26,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845188858] [2024-06-20 16:25:26,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:26,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:26,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:26,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:26,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:26,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:26,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 281 transitions, 2860 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:26,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:26,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:26,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:27,226 INFO L124 PetriNetUnfolderBase]: 2926/4662 cut-off events. [2024-06-20 16:25:27,227 INFO L125 PetriNetUnfolderBase]: For 571303/571305 co-relation queries the response was YES. [2024-06-20 16:25:27,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40644 conditions, 4662 events. 2926/4662 cut-off events. For 571303/571305 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 26632 event pairs, 843 based on Foata normal form. 2/4663 useless extension candidates. Maximal degree in co-relation 40532. Up to 4324 conditions per place. [2024-06-20 16:25:27,282 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 237 selfloop transitions, 55 changer transitions 0/302 dead transitions. [2024-06-20 16:25:27,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 302 transitions, 3928 flow [2024-06-20 16:25:27,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:25:27,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:25:27,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 16:25:27,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-20 16:25:27,283 INFO L175 Difference]: Start difference. First operand has 238 places, 281 transitions, 2860 flow. Second operand 8 states and 138 transitions. [2024-06-20 16:25:27,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 302 transitions, 3928 flow [2024-06-20 16:25:28,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 302 transitions, 3854 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 16:25:28,216 INFO L231 Difference]: Finished difference. Result has 240 places, 287 transitions, 3052 flow [2024-06-20 16:25:28,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2786, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3052, PETRI_PLACES=240, PETRI_TRANSITIONS=287} [2024-06-20 16:25:28,217 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-20 16:25:28,217 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 287 transitions, 3052 flow [2024-06-20 16:25:28,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:28,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:28,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:28,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 16:25:28,217 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)] === [2024-06-20 16:25:28,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:28,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1238241405, now seen corresponding path program 5 times [2024-06-20 16:25:28,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:28,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605278016] [2024-06-20 16:25:28,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:28,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:29,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:29,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:29,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605278016] [2024-06-20 16:25:29,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605278016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:29,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:29,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:29,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882593417] [2024-06-20 16:25:29,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:29,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:29,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:29,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:29,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:29,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:29,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 287 transitions, 3052 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:29,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:29,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:29,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:30,025 INFO L124 PetriNetUnfolderBase]: 2936/4677 cut-off events. [2024-06-20 16:25:30,025 INFO L125 PetriNetUnfolderBase]: For 589608/589610 co-relation queries the response was YES. [2024-06-20 16:25:30,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41393 conditions, 4677 events. 2936/4677 cut-off events. For 589608/589610 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 26745 event pairs, 825 based on Foata normal form. 2/4678 useless extension candidates. Maximal degree in co-relation 41280. Up to 4334 conditions per place. [2024-06-20 16:25:30,085 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 239 selfloop transitions, 57 changer transitions 0/306 dead transitions. [2024-06-20 16:25:30,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 306 transitions, 4070 flow [2024-06-20 16:25:30,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:25:30,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:25:30,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 16:25:30,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 16:25:30,087 INFO L175 Difference]: Start difference. First operand has 240 places, 287 transitions, 3052 flow. Second operand 8 states and 140 transitions. [2024-06-20 16:25:30,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 306 transitions, 4070 flow [2024-06-20 16:25:31,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 306 transitions, 3876 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-20 16:25:31,072 INFO L231 Difference]: Finished difference. Result has 243 places, 290 transitions, 3056 flow [2024-06-20 16:25:31,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2878, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3056, PETRI_PLACES=243, PETRI_TRANSITIONS=290} [2024-06-20 16:25:31,072 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-20 16:25:31,072 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 290 transitions, 3056 flow [2024-06-20 16:25:31,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:31,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:31,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:31,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 16:25:31,073 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:25:31,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:31,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1245593055, now seen corresponding path program 6 times [2024-06-20 16:25:31,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:31,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211631145] [2024-06-20 16:25:31,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:31,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:31,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:31,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211631145] [2024-06-20 16:25:31,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211631145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:31,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:31,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:31,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319538711] [2024-06-20 16:25:31,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:31,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:31,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:31,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:31,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:32,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:32,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 290 transitions, 3056 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:32,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:32,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:32,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:32,794 INFO L124 PetriNetUnfolderBase]: 2930/4668 cut-off events. [2024-06-20 16:25:32,794 INFO L125 PetriNetUnfolderBase]: For 594443/594445 co-relation queries the response was YES. [2024-06-20 16:25:32,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40901 conditions, 4668 events. 2930/4668 cut-off events. For 594443/594445 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 26681 event pairs, 838 based on Foata normal form. 2/4669 useless extension candidates. Maximal degree in co-relation 40787. Up to 4329 conditions per place. [2024-06-20 16:25:32,846 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 233 selfloop transitions, 61 changer transitions 0/304 dead transitions. [2024-06-20 16:25:32,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 304 transitions, 3838 flow [2024-06-20 16:25:32,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:25:32,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:25:32,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 16:25:32,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 16:25:32,847 INFO L175 Difference]: Start difference. First operand has 243 places, 290 transitions, 3056 flow. Second operand 8 states and 136 transitions. [2024-06-20 16:25:32,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 304 transitions, 3838 flow [2024-06-20 16:25:33,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 304 transitions, 3652 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-20 16:25:33,825 INFO L231 Difference]: Finished difference. Result has 246 places, 290 transitions, 2998 flow [2024-06-20 16:25:33,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2870, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2998, PETRI_PLACES=246, PETRI_TRANSITIONS=290} [2024-06-20 16:25:33,829 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-20 16:25:33,829 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 290 transitions, 2998 flow [2024-06-20 16:25:33,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:33,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:33,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:33,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 16:25:33,829 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:25:33,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:33,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1238241622, now seen corresponding path program 2 times [2024-06-20 16:25:33,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:33,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940126636] [2024-06-20 16:25:33,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:33,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:34,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:34,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:34,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940126636] [2024-06-20 16:25:34,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940126636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:34,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:34,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:34,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361023164] [2024-06-20 16:25:34,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:34,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:34,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:34,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:34,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:34,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:34,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 290 transitions, 2998 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:34,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:34,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:34,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:35,657 INFO L124 PetriNetUnfolderBase]: 2940/4682 cut-off events. [2024-06-20 16:25:35,657 INFO L125 PetriNetUnfolderBase]: For 608629/608633 co-relation queries the response was YES. [2024-06-20 16:25:35,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41124 conditions, 4682 events. 2940/4682 cut-off events. For 608629/608633 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 26758 event pairs, 818 based on Foata normal form. 6/4687 useless extension candidates. Maximal degree in co-relation 41009. Up to 4407 conditions per place. [2024-06-20 16:25:35,705 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 259 selfloop transitions, 38 changer transitions 0/307 dead transitions. [2024-06-20 16:25:35,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 307 transitions, 3920 flow [2024-06-20 16:25:35,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:25:35,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:25:35,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 16:25:35,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 16:25:35,706 INFO L175 Difference]: Start difference. First operand has 246 places, 290 transitions, 2998 flow. Second operand 8 states and 132 transitions. [2024-06-20 16:25:35,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 307 transitions, 3920 flow [2024-06-20 16:25:36,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 307 transitions, 3774 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 16:25:36,560 INFO L231 Difference]: Finished difference. Result has 246 places, 296 transitions, 3084 flow [2024-06-20 16:25:36,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2852, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3084, PETRI_PLACES=246, PETRI_TRANSITIONS=296} [2024-06-20 16:25:36,561 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-20 16:25:36,561 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 296 transitions, 3084 flow [2024-06-20 16:25:36,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:36,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:36,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:36,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 16:25:36,562 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:25:36,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:36,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1209455624, now seen corresponding path program 3 times [2024-06-20 16:25:36,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:36,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695788831] [2024-06-20 16:25:36,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:36,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:37,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:37,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:37,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695788831] [2024-06-20 16:25:37,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695788831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:37,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:37,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:37,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561926204] [2024-06-20 16:25:37,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:37,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:37,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:37,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:37,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:37,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:37,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 296 transitions, 3084 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:37,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:37,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:37,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:38,421 INFO L124 PetriNetUnfolderBase]: 2945/4691 cut-off events. [2024-06-20 16:25:38,421 INFO L125 PetriNetUnfolderBase]: For 625616/625620 co-relation queries the response was YES. [2024-06-20 16:25:38,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41569 conditions, 4691 events. 2945/4691 cut-off events. For 625616/625620 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 26861 event pairs, 819 based on Foata normal form. 6/4696 useless extension candidates. Maximal degree in co-relation 41453. Up to 4413 conditions per place. [2024-06-20 16:25:38,471 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 256 selfloop transitions, 44 changer transitions 0/310 dead transitions. [2024-06-20 16:25:38,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 310 transitions, 3948 flow [2024-06-20 16:25:38,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:25:38,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:25:38,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 16:25:38,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-20 16:25:38,473 INFO L175 Difference]: Start difference. First operand has 246 places, 296 transitions, 3084 flow. Second operand 8 states and 130 transitions. [2024-06-20 16:25:38,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 310 transitions, 3948 flow [2024-06-20 16:25:39,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 310 transitions, 3839 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-20 16:25:39,352 INFO L231 Difference]: Finished difference. Result has 250 places, 299 transitions, 3148 flow [2024-06-20 16:25:39,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2981, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3148, PETRI_PLACES=250, PETRI_TRANSITIONS=299} [2024-06-20 16:25:39,353 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-20 16:25:39,353 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 299 transitions, 3148 flow [2024-06-20 16:25:39,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:39,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:39,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:39,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 16:25:39,354 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:25:39,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:39,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1245593272, now seen corresponding path program 4 times [2024-06-20 16:25:39,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:39,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808406017] [2024-06-20 16:25:39,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:39,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:40,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:40,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808406017] [2024-06-20 16:25:40,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808406017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:40,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:40,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:40,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583327962] [2024-06-20 16:25:40,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:40,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:40,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:40,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:40,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:40,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:40,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 299 transitions, 3148 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:40,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:40,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:40,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:41,144 INFO L124 PetriNetUnfolderBase]: 2939/4683 cut-off events. [2024-06-20 16:25:41,144 INFO L125 PetriNetUnfolderBase]: For 633785/633789 co-relation queries the response was YES. [2024-06-20 16:25:41,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41539 conditions, 4683 events. 2939/4683 cut-off events. For 633785/633789 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 26788 event pairs, 818 based on Foata normal form. 6/4688 useless extension candidates. Maximal degree in co-relation 41421. Up to 4408 conditions per place. [2024-06-20 16:25:41,195 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 257 selfloop transitions, 42 changer transitions 0/309 dead transitions. [2024-06-20 16:25:41,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 309 transitions, 3774 flow [2024-06-20 16:25:41,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:25:41,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:25:41,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 16:25:41,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-20 16:25:41,197 INFO L175 Difference]: Start difference. First operand has 250 places, 299 transitions, 3148 flow. Second operand 8 states and 130 transitions. [2024-06-20 16:25:41,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 309 transitions, 3774 flow [2024-06-20 16:25:42,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 309 transitions, 3589 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-20 16:25:42,134 INFO L231 Difference]: Finished difference. Result has 253 places, 299 transitions, 3053 flow [2024-06-20 16:25:42,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2963, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3053, PETRI_PLACES=253, PETRI_TRANSITIONS=299} [2024-06-20 16:25:42,134 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-20 16:25:42,134 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 299 transitions, 3053 flow [2024-06-20 16:25:42,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:42,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:42,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:42,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 16:25:42,135 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)] === [2024-06-20 16:25:42,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:42,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1245870102, now seen corresponding path program 1 times [2024-06-20 16:25:42,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:42,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027962134] [2024-06-20 16:25:42,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:42,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:43,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:43,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:43,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027962134] [2024-06-20 16:25:43,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027962134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:43,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:43,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:25:43,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573818962] [2024-06-20 16:25:43,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:43,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:25:43,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:43,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:25:43,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:25:43,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:43,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 299 transitions, 3053 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:43,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:43,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:43,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:44,409 INFO L124 PetriNetUnfolderBase]: 2832/4523 cut-off events. [2024-06-20 16:25:44,409 INFO L125 PetriNetUnfolderBase]: For 641084/641118 co-relation queries the response was YES. [2024-06-20 16:25:44,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40617 conditions, 4523 events. 2832/4523 cut-off events. For 641084/641118 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 26018 event pairs, 809 based on Foata normal form. 17/4499 useless extension candidates. Maximal degree in co-relation 40498. Up to 4251 conditions per place. [2024-06-20 16:25:44,464 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 255 selfloop transitions, 21 changer transitions 0/313 dead transitions. [2024-06-20 16:25:44,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 313 transitions, 3701 flow [2024-06-20 16:25:44,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:25:44,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:25:44,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-20 16:25:44,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-20 16:25:44,466 INFO L175 Difference]: Start difference. First operand has 253 places, 299 transitions, 3053 flow. Second operand 9 states and 138 transitions. [2024-06-20 16:25:44,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 313 transitions, 3701 flow [2024-06-20 16:25:45,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 313 transitions, 3588 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 16:25:45,471 INFO L231 Difference]: Finished difference. Result has 254 places, 302 transitions, 3060 flow [2024-06-20 16:25:45,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2940, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3060, PETRI_PLACES=254, PETRI_TRANSITIONS=302} [2024-06-20 16:25:45,472 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-20 16:25:45,472 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 302 transitions, 3060 flow [2024-06-20 16:25:45,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:45,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:45,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:45,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 16:25:45,473 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)] === [2024-06-20 16:25:45,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:45,473 INFO L85 PathProgramCache]: Analyzing trace with hash -993943610, now seen corresponding path program 1 times [2024-06-20 16:25:45,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:45,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698406875] [2024-06-20 16:25:45,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:45,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:45,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:46,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:46,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:46,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698406875] [2024-06-20 16:25:46,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698406875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:46,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:46,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:46,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870405343] [2024-06-20 16:25:46,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:46,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:46,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:46,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:46,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:46,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:46,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 302 transitions, 3060 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:46,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:46,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:46,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:47,419 INFO L124 PetriNetUnfolderBase]: 2967/4708 cut-off events. [2024-06-20 16:25:47,419 INFO L125 PetriNetUnfolderBase]: For 660240/660240 co-relation queries the response was YES. [2024-06-20 16:25:47,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42280 conditions, 4708 events. 2967/4708 cut-off events. For 660240/660240 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 26857 event pairs, 775 based on Foata normal form. 1/4700 useless extension candidates. Maximal degree in co-relation 42160. Up to 4390 conditions per place. [2024-06-20 16:25:47,480 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 275 selfloop transitions, 34 changer transitions 0/328 dead transitions. [2024-06-20 16:25:47,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 328 transitions, 3834 flow [2024-06-20 16:25:47,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:25:47,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:25:47,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 16:25:47,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 16:25:47,481 INFO L175 Difference]: Start difference. First operand has 254 places, 302 transitions, 3060 flow. Second operand 8 states and 140 transitions. [2024-06-20 16:25:47,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 328 transitions, 3834 flow [2024-06-20 16:25:48,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 328 transitions, 3658 flow, removed 33 selfloop flow, removed 10 redundant places. [2024-06-20 16:25:48,653 INFO L231 Difference]: Finished difference. Result has 252 places, 305 transitions, 3045 flow [2024-06-20 16:25:48,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2884, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3045, PETRI_PLACES=252, PETRI_TRANSITIONS=305} [2024-06-20 16:25:48,654 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-20 16:25:48,654 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 305 transitions, 3045 flow [2024-06-20 16:25:48,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:48,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:48,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:48,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 16:25:48,655 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)] === [2024-06-20 16:25:48,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:48,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1423994750, now seen corresponding path program 2 times [2024-06-20 16:25:48,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:48,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557864308] [2024-06-20 16:25:48,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:48,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:48,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:49,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:49,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:49,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557864308] [2024-06-20 16:25:49,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557864308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:49,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:49,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:49,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647754006] [2024-06-20 16:25:49,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:49,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:49,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:49,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:49,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:49,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:49,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 305 transitions, 3045 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:49,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:49,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:49,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:50,645 INFO L124 PetriNetUnfolderBase]: 2977/4724 cut-off events. [2024-06-20 16:25:50,645 INFO L125 PetriNetUnfolderBase]: For 677602/677602 co-relation queries the response was YES. [2024-06-20 16:25:50,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42928 conditions, 4724 events. 2977/4724 cut-off events. For 677602/677602 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 26973 event pairs, 775 based on Foata normal form. 1/4716 useless extension candidates. Maximal degree in co-relation 42808. Up to 4394 conditions per place. [2024-06-20 16:25:50,704 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 276 selfloop transitions, 40 changer transitions 0/335 dead transitions. [2024-06-20 16:25:50,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 335 transitions, 3863 flow [2024-06-20 16:25:50,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:25:50,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:25:50,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 16:25:50,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-20 16:25:50,705 INFO L175 Difference]: Start difference. First operand has 252 places, 305 transitions, 3045 flow. Second operand 9 states and 154 transitions. [2024-06-20 16:25:50,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 335 transitions, 3863 flow [2024-06-20 16:25:52,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 335 transitions, 3726 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-20 16:25:52,019 INFO L231 Difference]: Finished difference. Result has 256 places, 311 transitions, 3125 flow [2024-06-20 16:25:52,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2908, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3125, PETRI_PLACES=256, PETRI_TRANSITIONS=311} [2024-06-20 16:25:52,020 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-20 16:25:52,020 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 311 transitions, 3125 flow [2024-06-20 16:25:52,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:52,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:52,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:52,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 16:25:52,021 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)] === [2024-06-20 16:25:52,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:52,021 INFO L85 PathProgramCache]: Analyzing trace with hash -573950500, now seen corresponding path program 3 times [2024-06-20 16:25:52,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:52,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581146371] [2024-06-20 16:25:52,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:52,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:52,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:52,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:52,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581146371] [2024-06-20 16:25:52,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581146371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:52,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:52,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:52,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368681940] [2024-06-20 16:25:52,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:52,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:52,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:52,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:52,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:52,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:52,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 311 transitions, 3125 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:52,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:52,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:52,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:53,922 INFO L124 PetriNetUnfolderBase]: 3025/4804 cut-off events. [2024-06-20 16:25:53,922 INFO L125 PetriNetUnfolderBase]: For 697027/697031 co-relation queries the response was YES. [2024-06-20 16:25:53,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43976 conditions, 4804 events. 3025/4804 cut-off events. For 697027/697031 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 27471 event pairs, 794 based on Foata normal form. 5/4800 useless extension candidates. Maximal degree in co-relation 43854. Up to 4378 conditions per place. [2024-06-20 16:25:53,983 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 267 selfloop transitions, 66 changer transitions 0/352 dead transitions. [2024-06-20 16:25:53,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 352 transitions, 4152 flow [2024-06-20 16:25:53,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:25:53,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:25:53,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 16:25:53,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 16:25:53,984 INFO L175 Difference]: Start difference. First operand has 256 places, 311 transitions, 3125 flow. Second operand 9 states and 153 transitions. [2024-06-20 16:25:53,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 352 transitions, 4152 flow [2024-06-20 16:25:55,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 352 transitions, 3981 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-20 16:25:55,198 INFO L231 Difference]: Finished difference. Result has 260 places, 330 transitions, 3402 flow [2024-06-20 16:25:55,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2976, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3402, PETRI_PLACES=260, PETRI_TRANSITIONS=330} [2024-06-20 16:25:55,199 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-20 16:25:55,199 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 330 transitions, 3402 flow [2024-06-20 16:25:55,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:55,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:55,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:55,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 16:25:55,200 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)] === [2024-06-20 16:25:55,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:55,200 INFO L85 PathProgramCache]: Analyzing trace with hash -573771754, now seen corresponding path program 1 times [2024-06-20 16:25:55,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:55,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681697654] [2024-06-20 16:25:55,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:55,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:55,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:56,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:56,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:56,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681697654] [2024-06-20 16:25:56,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681697654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:56,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:56,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:56,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219885343] [2024-06-20 16:25:56,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:56,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:56,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:56,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:56,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:56,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:56,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 330 transitions, 3402 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:56,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:56,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:56,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:57,427 INFO L124 PetriNetUnfolderBase]: 3035/4821 cut-off events. [2024-06-20 16:25:57,427 INFO L125 PetriNetUnfolderBase]: For 717783/717789 co-relation queries the response was YES. [2024-06-20 16:25:57,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44748 conditions, 4821 events. 3035/4821 cut-off events. For 717783/717789 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 27634 event pairs, 738 based on Foata normal form. 6/4818 useless extension candidates. Maximal degree in co-relation 44624. Up to 4360 conditions per place. [2024-06-20 16:25:57,493 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 275 selfloop transitions, 73 changer transitions 0/367 dead transitions. [2024-06-20 16:25:57,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 367 transitions, 4334 flow [2024-06-20 16:25:57,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:25:57,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:25:57,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 16:25:57,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-20 16:25:57,494 INFO L175 Difference]: Start difference. First operand has 260 places, 330 transitions, 3402 flow. Second operand 8 states and 145 transitions. [2024-06-20 16:25:57,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 367 transitions, 4334 flow [2024-06-20 16:25:58,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 367 transitions, 4183 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-20 16:25:58,411 INFO L231 Difference]: Finished difference. Result has 266 places, 342 transitions, 3570 flow [2024-06-20 16:25:58,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3251, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3570, PETRI_PLACES=266, PETRI_TRANSITIONS=342} [2024-06-20 16:25:58,412 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-20 16:25:58,412 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 342 transitions, 3570 flow [2024-06-20 16:25:58,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:58,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:58,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:58,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 16:25:58,413 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)] === [2024-06-20 16:25:58,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:58,413 INFO L85 PathProgramCache]: Analyzing trace with hash -573651784, now seen corresponding path program 2 times [2024-06-20 16:25:58,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:58,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788797167] [2024-06-20 16:25:58,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:58,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:59,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:59,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:59,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788797167] [2024-06-20 16:25:59,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788797167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:59,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:59,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:59,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369114380] [2024-06-20 16:25:59,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:59,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:59,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:59,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:59,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:59,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:59,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 342 transitions, 3570 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:59,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:59,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:59,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:26:00,710 INFO L124 PetriNetUnfolderBase]: 3053/4846 cut-off events. [2024-06-20 16:26:00,710 INFO L125 PetriNetUnfolderBase]: For 740521/740527 co-relation queries the response was YES. [2024-06-20 16:26:00,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45971 conditions, 4846 events. 3053/4846 cut-off events. For 740521/740527 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 27800 event pairs, 744 based on Foata normal form. 6/4843 useless extension candidates. Maximal degree in co-relation 45845. Up to 4360 conditions per place. [2024-06-20 16:26:00,763 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 274 selfloop transitions, 78 changer transitions 0/371 dead transitions. [2024-06-20 16:26:00,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 371 transitions, 4677 flow [2024-06-20 16:26:00,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:26:00,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:26:00,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 16:26:00,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-20 16:26:00,764 INFO L175 Difference]: Start difference. First operand has 266 places, 342 transitions, 3570 flow. Second operand 8 states and 146 transitions. [2024-06-20 16:26:00,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 371 transitions, 4677 flow [2024-06-20 16:26:02,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 371 transitions, 4513 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-20 16:26:02,035 INFO L231 Difference]: Finished difference. Result has 270 places, 348 transitions, 3722 flow [2024-06-20 16:26:02,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3406, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3722, PETRI_PLACES=270, PETRI_TRANSITIONS=348} [2024-06-20 16:26:02,036 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-20 16:26:02,036 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 348 transitions, 3722 flow [2024-06-20 16:26:02,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:02,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:26:02,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:26:02,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 16:26:02,036 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)] === [2024-06-20 16:26:02,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:26:02,037 INFO L85 PathProgramCache]: Analyzing trace with hash -878353910, now seen corresponding path program 4 times [2024-06-20 16:26:02,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:26:02,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395297652] [2024-06-20 16:26:02,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:26:02,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:26:02,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:26:02,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:26:02,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:26:02,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395297652] [2024-06-20 16:26:02,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395297652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:26:02,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:26:02,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:26:02,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335537565] [2024-06-20 16:26:02,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:26:02,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:26:02,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:26:02,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:26:02,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:26:03,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:26:03,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 348 transitions, 3722 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:03,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:26:03,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:26:03,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:26:04,007 INFO L124 PetriNetUnfolderBase]: 3065/4857 cut-off events. [2024-06-20 16:26:04,007 INFO L125 PetriNetUnfolderBase]: For 762286/762290 co-relation queries the response was YES. [2024-06-20 16:26:04,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46822 conditions, 4857 events. 3065/4857 cut-off events. For 762286/762290 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27762 event pairs, 760 based on Foata normal form. 5/4853 useless extension candidates. Maximal degree in co-relation 46695. Up to 4409 conditions per place. [2024-06-20 16:26:04,069 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 280 selfloop transitions, 76 changer transitions 0/375 dead transitions. [2024-06-20 16:26:04,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 375 transitions, 4884 flow [2024-06-20 16:26:04,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:26:04,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:26:04,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 16:26:04,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 16:26:04,071 INFO L175 Difference]: Start difference. First operand has 270 places, 348 transitions, 3722 flow. Second operand 8 states and 140 transitions. [2024-06-20 16:26:04,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 375 transitions, 4884 flow [2024-06-20 16:26:05,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 375 transitions, 4727 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-20 16:26:05,273 INFO L231 Difference]: Finished difference. Result has 274 places, 354 transitions, 3933 flow [2024-06-20 16:26:05,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3565, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3933, PETRI_PLACES=274, PETRI_TRANSITIONS=354} [2024-06-20 16:26:05,274 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-20 16:26:05,274 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 354 transitions, 3933 flow [2024-06-20 16:26:05,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:05,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:26:05,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:26:05,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 16:26:05,275 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:26:05,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:26:05,275 INFO L85 PathProgramCache]: Analyzing trace with hash -878353538, now seen corresponding path program 1 times [2024-06-20 16:26:05,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:26:05,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464716943] [2024-06-20 16:26:05,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:26:05,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:26:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:26:06,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:26:06,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:26:06,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464716943] [2024-06-20 16:26:06,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464716943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:26:06,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:26:06,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:26:06,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548597160] [2024-06-20 16:26:06,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:26:06,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:26:06,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:26:06,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:26:06,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:26:06,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:26:06,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 354 transitions, 3933 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:06,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:26:06,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:26:06,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:26:07,277 INFO L124 PetriNetUnfolderBase]: 3161/4964 cut-off events. [2024-06-20 16:26:07,278 INFO L125 PetriNetUnfolderBase]: For 782083/782091 co-relation queries the response was YES. [2024-06-20 16:26:07,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48077 conditions, 4964 events. 3161/4964 cut-off events. For 782083/782091 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 28033 event pairs, 770 based on Foata normal form. 9/4972 useless extension candidates. Maximal degree in co-relation 47948. Up to 4745 conditions per place. [2024-06-20 16:26:07,346 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 333 selfloop transitions, 40 changer transitions 0/377 dead transitions. [2024-06-20 16:26:07,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 377 transitions, 4829 flow [2024-06-20 16:26:07,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:26:07,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:26:07,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-20 16:26:07,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-20 16:26:07,347 INFO L175 Difference]: Start difference. First operand has 274 places, 354 transitions, 3933 flow. Second operand 8 states and 129 transitions. [2024-06-20 16:26:07,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 377 transitions, 4829 flow [2024-06-20 16:26:08,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 377 transitions, 4642 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-20 16:26:08,729 INFO L231 Difference]: Finished difference. Result has 278 places, 357 transitions, 3916 flow [2024-06-20 16:26:08,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3746, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3916, PETRI_PLACES=278, PETRI_TRANSITIONS=357} [2024-06-20 16:26:08,730 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-20 16:26:08,730 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 357 transitions, 3916 flow [2024-06-20 16:26:08,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:08,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:26:08,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:26:08,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 16:26:08,730 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:26:08,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:26:08,731 INFO L85 PathProgramCache]: Analyzing trace with hash -701342360, now seen corresponding path program 5 times [2024-06-20 16:26:08,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:26:08,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221668027] [2024-06-20 16:26:08,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:26:08,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:26:08,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:26:09,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:26:09,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:26:09,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221668027] [2024-06-20 16:26:09,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221668027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:26:09,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:26:09,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:26:09,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403916553] [2024-06-20 16:26:09,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:26:09,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:26:09,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:26:09,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:26:09,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:26:09,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:26:09,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 357 transitions, 3916 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:09,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:26:09,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:26:09,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:26:10,764 INFO L124 PetriNetUnfolderBase]: 3086/4883 cut-off events. [2024-06-20 16:26:10,764 INFO L125 PetriNetUnfolderBase]: For 799762/799762 co-relation queries the response was YES. [2024-06-20 16:26:10,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48253 conditions, 4883 events. 3086/4883 cut-off events. For 799762/799762 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 27879 event pairs, 747 based on Foata normal form. 1/4875 useless extension candidates. Maximal degree in co-relation 48122. Up to 4552 conditions per place. [2024-06-20 16:26:10,829 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 315 selfloop transitions, 40 changer transitions 0/375 dead transitions. [2024-06-20 16:26:10,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 375 transitions, 4782 flow [2024-06-20 16:26:10,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:26:10,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:26:10,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 16:26:10,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-20 16:26:10,831 INFO L175 Difference]: Start difference. First operand has 278 places, 357 transitions, 3916 flow. Second operand 8 states and 133 transitions. [2024-06-20 16:26:10,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 375 transitions, 4782 flow [2024-06-20 16:26:12,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 375 transitions, 4634 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-20 16:26:12,535 INFO L231 Difference]: Finished difference. Result has 280 places, 360 transitions, 3970 flow [2024-06-20 16:26:12,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3768, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3970, PETRI_PLACES=280, PETRI_TRANSITIONS=360} [2024-06-20 16:26:12,535 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-20 16:26:12,535 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 360 transitions, 3970 flow [2024-06-20 16:26:12,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:12,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:26:12,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:26:12,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 16:26:12,536 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:26:12,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:26:12,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1722096774, now seen corresponding path program 2 times [2024-06-20 16:26:12,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:26:12,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401963141] [2024-06-20 16:26:12,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:26:12,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:26:12,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:26:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:26:13,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:26:13,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401963141] [2024-06-20 16:26:13,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401963141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:26:13,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:26:13,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:26:13,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916314725] [2024-06-20 16:26:13,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:26:13,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:26:13,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:26:13,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:26:13,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:26:13,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:26:13,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 360 transitions, 3970 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:13,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:26:13,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:26:13,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:26:14,512 INFO L124 PetriNetUnfolderBase]: 3179/4992 cut-off events. [2024-06-20 16:26:14,512 INFO L125 PetriNetUnfolderBase]: For 822711/822719 co-relation queries the response was YES. [2024-06-20 16:26:14,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49465 conditions, 4992 events. 3179/4992 cut-off events. For 822711/822719 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 28282 event pairs, 774 based on Foata normal form. 9/5000 useless extension candidates. Maximal degree in co-relation 49333. Up to 4743 conditions per place. [2024-06-20 16:26:14,588 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 328 selfloop transitions, 53 changer transitions 0/385 dead transitions. [2024-06-20 16:26:14,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 385 transitions, 5150 flow [2024-06-20 16:26:14,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:26:14,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:26:14,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-20 16:26:14,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-20 16:26:14,589 INFO L175 Difference]: Start difference. First operand has 280 places, 360 transitions, 3970 flow. Second operand 8 states and 129 transitions. [2024-06-20 16:26:14,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 385 transitions, 5150 flow [2024-06-20 16:26:16,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 385 transitions, 4925 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-20 16:26:16,238 INFO L231 Difference]: Finished difference. Result has 282 places, 368 transitions, 4064 flow [2024-06-20 16:26:16,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3745, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4064, PETRI_PLACES=282, PETRI_TRANSITIONS=368} [2024-06-20 16:26:16,238 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-20 16:26:16,239 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 368 transitions, 4064 flow [2024-06-20 16:26:16,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:16,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:26:16,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:26:16,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 16:26:16,239 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:26:16,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:26:16,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1721859624, now seen corresponding path program 3 times [2024-06-20 16:26:16,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:26:16,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120385845] [2024-06-20 16:26:16,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:26:16,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:26:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:26:17,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:26:17,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:26:17,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120385845] [2024-06-20 16:26:17,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120385845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:26:17,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:26:17,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:26:17,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318901972] [2024-06-20 16:26:17,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:26:17,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:26:17,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:26:17,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:26:17,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:26:17,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:26:17,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 368 transitions, 4064 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:17,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:26:17,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:26:17,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:26:18,137 INFO L124 PetriNetUnfolderBase]: 3184/4999 cut-off events. [2024-06-20 16:26:18,137 INFO L125 PetriNetUnfolderBase]: For 842232/842240 co-relation queries the response was YES. [2024-06-20 16:26:18,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49979 conditions, 4999 events. 3184/4999 cut-off events. For 842232/842240 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 28320 event pairs, 774 based on Foata normal form. 9/5007 useless extension candidates. Maximal degree in co-relation 49847. Up to 4749 conditions per place. [2024-06-20 16:26:18,202 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 330 selfloop transitions, 54 changer transitions 0/388 dead transitions. [2024-06-20 16:26:18,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 388 transitions, 5162 flow [2024-06-20 16:26:18,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:26:18,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:26:18,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 16:26:18,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-20 16:26:18,203 INFO L175 Difference]: Start difference. First operand has 282 places, 368 transitions, 4064 flow. Second operand 8 states and 130 transitions. [2024-06-20 16:26:18,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 388 transitions, 5162 flow [2024-06-20 16:26:20,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 388 transitions, 4979 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-20 16:26:20,067 INFO L231 Difference]: Finished difference. Result has 286 places, 371 transitions, 4090 flow [2024-06-20 16:26:20,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3905, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4090, PETRI_PLACES=286, PETRI_TRANSITIONS=371} [2024-06-20 16:26:20,068 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-20 16:26:20,068 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 371 transitions, 4090 flow [2024-06-20 16:26:20,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:20,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:26:20,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:26:20,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 16:26:20,068 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:26:20,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:26:20,069 INFO L85 PathProgramCache]: Analyzing trace with hash -701222204, now seen corresponding path program 3 times [2024-06-20 16:26:20,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:26:20,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918248831] [2024-06-20 16:26:20,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:26:20,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:26:20,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:26:20,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:26:20,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:26:20,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918248831] [2024-06-20 16:26:20,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918248831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:26:20,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:26:20,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:26:20,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471708211] [2024-06-20 16:26:20,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:26:20,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:26:20,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:26:20,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:26:20,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:26:20,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:26:20,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 371 transitions, 4090 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:20,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:26:20,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:26:20,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:26:22,323 INFO L124 PetriNetUnfolderBase]: 3132/4954 cut-off events. [2024-06-20 16:26:22,323 INFO L125 PetriNetUnfolderBase]: For 878009/878018 co-relation queries the response was YES. [2024-06-20 16:26:22,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50404 conditions, 4954 events. 3132/4954 cut-off events. For 878009/878018 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 28317 event pairs, 757 based on Foata normal form. 9/4958 useless extension candidates. Maximal degree in co-relation 50270. Up to 4410 conditions per place. [2024-06-20 16:26:22,389 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 284 selfloop transitions, 88 changer transitions 0/396 dead transitions. [2024-06-20 16:26:22,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 396 transitions, 5258 flow [2024-06-20 16:26:22,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:26:22,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:26:22,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:26:22,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-20 16:26:22,390 INFO L175 Difference]: Start difference. First operand has 286 places, 371 transitions, 4090 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:26:22,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 396 transitions, 5258 flow [2024-06-20 16:26:24,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 396 transitions, 5121 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-20 16:26:24,396 INFO L231 Difference]: Finished difference. Result has 289 places, 377 transitions, 4317 flow [2024-06-20 16:26:24,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3953, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4317, PETRI_PLACES=289, PETRI_TRANSITIONS=377} [2024-06-20 16:26:24,397 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-20 16:26:24,397 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 377 transitions, 4317 flow [2024-06-20 16:26:24,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:24,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:26:24,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:26:24,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 16:26:24,398 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:26:24,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:26:24,398 INFO L85 PathProgramCache]: Analyzing trace with hash -396520450, now seen corresponding path program 6 times [2024-06-20 16:26:24,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:26:24,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001628496] [2024-06-20 16:26:24,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:26:24,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:26:24,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:26:25,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:26:25,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:26:25,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001628496] [2024-06-20 16:26:25,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001628496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:26:25,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:26:25,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:26:25,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974547914] [2024-06-20 16:26:25,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:26:25,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:26:25,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:26:25,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:26:25,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:26:25,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:26:25,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 377 transitions, 4317 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:25,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:26:25,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:26:25,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:26:26,548 INFO L124 PetriNetUnfolderBase]: 3145/4962 cut-off events. [2024-06-20 16:26:26,548 INFO L125 PetriNetUnfolderBase]: For 899030/899034 co-relation queries the response was YES. [2024-06-20 16:26:26,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51509 conditions, 4962 events. 3145/4962 cut-off events. For 899030/899034 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28318 event pairs, 779 based on Foata normal form. 5/4958 useless extension candidates. Maximal degree in co-relation 51374. Up to 4462 conditions per place. [2024-06-20 16:26:26,608 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 284 selfloop transitions, 92 changer transitions 0/400 dead transitions. [2024-06-20 16:26:26,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 400 transitions, 5548 flow [2024-06-20 16:26:26,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:26:26,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:26:26,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 16:26:26,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-20 16:26:26,609 INFO L175 Difference]: Start difference. First operand has 289 places, 377 transitions, 4317 flow. Second operand 8 states and 138 transitions. [2024-06-20 16:26:26,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 400 transitions, 5548 flow [2024-06-20 16:26:27,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 400 transitions, 5379 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-20 16:26:27,906 INFO L231 Difference]: Finished difference. Result has 293 places, 383 transitions, 4584 flow [2024-06-20 16:26:27,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4148, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4584, PETRI_PLACES=293, PETRI_TRANSITIONS=383} [2024-06-20 16:26:27,907 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-20 16:26:27,907 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 383 transitions, 4584 flow [2024-06-20 16:26:27,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:27,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:26:27,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:26:27,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 16:26:27,908 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:26:27,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:26:27,908 INFO L85 PathProgramCache]: Analyzing trace with hash -692101606, now seen corresponding path program 1 times [2024-06-20 16:26:27,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:26:27,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811032569] [2024-06-20 16:26:27,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:26:27,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:26:27,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:26:28,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:26:28,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:26:28,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811032569] [2024-06-20 16:26:28,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811032569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:26:28,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:26:28,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:26:28,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410442967] [2024-06-20 16:26:28,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:26:28,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:26:28,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:26:28,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:26:28,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:26:28,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:26:28,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 383 transitions, 4584 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:28,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:26:28,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:26:28,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:26:30,029 INFO L124 PetriNetUnfolderBase]: 3153/4983 cut-off events. [2024-06-20 16:26:30,029 INFO L125 PetriNetUnfolderBase]: For 926978/926982 co-relation queries the response was YES. [2024-06-20 16:26:30,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52322 conditions, 4983 events. 3153/4983 cut-off events. For 926978/926982 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 28484 event pairs, 599 based on Foata normal form. 6/4980 useless extension candidates. Maximal degree in co-relation 52185. Up to 4606 conditions per place. [2024-06-20 16:26:30,099 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 350 selfloop transitions, 36 changer transitions 0/410 dead transitions. [2024-06-20 16:26:30,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 410 transitions, 5506 flow [2024-06-20 16:26:30,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:26:30,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:26:30,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 16:26:30,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 16:26:30,100 INFO L175 Difference]: Start difference. First operand has 293 places, 383 transitions, 4584 flow. Second operand 8 states and 140 transitions. [2024-06-20 16:26:30,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 410 transitions, 5506 flow [2024-06-20 16:26:31,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 410 transitions, 5309 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-20 16:26:31,945 INFO L231 Difference]: Finished difference. Result has 297 places, 385 transitions, 4538 flow [2024-06-20 16:26:31,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4387, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4538, PETRI_PLACES=297, PETRI_TRANSITIONS=385} [2024-06-20 16:26:31,945 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-20 16:26:31,945 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 385 transitions, 4538 flow [2024-06-20 16:26:31,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:31,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:26:31,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:26:31,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 16:26:31,946 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:26:31,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:26:31,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1711905276, now seen corresponding path program 2 times [2024-06-20 16:26:31,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:26:31,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977114077] [2024-06-20 16:26:31,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:26:31,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:26:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:26:32,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:26:32,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:26:32,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977114077] [2024-06-20 16:26:32,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977114077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:26:32,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:26:32,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:26:32,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421724956] [2024-06-20 16:26:32,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:26:32,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:26:32,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:26:32,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:26:32,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:26:32,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:26:32,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 385 transitions, 4538 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:32,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:26:32,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:26:32,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:26:34,126 INFO L124 PetriNetUnfolderBase]: 3161/4995 cut-off events. [2024-06-20 16:26:34,126 INFO L125 PetriNetUnfolderBase]: For 944194/944198 co-relation queries the response was YES. [2024-06-20 16:26:34,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52810 conditions, 4995 events. 3161/4995 cut-off events. For 944194/944198 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 28579 event pairs, 740 based on Foata normal form. 6/4992 useless extension candidates. Maximal degree in co-relation 52671. Up to 4657 conditions per place. [2024-06-20 16:26:34,201 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 347 selfloop transitions, 37 changer transitions 0/408 dead transitions. [2024-06-20 16:26:34,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 408 transitions, 5446 flow [2024-06-20 16:26:34,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:26:34,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:26:34,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 16:26:34,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-20 16:26:34,202 INFO L175 Difference]: Start difference. First operand has 297 places, 385 transitions, 4538 flow. Second operand 8 states and 137 transitions. [2024-06-20 16:26:34,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 408 transitions, 5446 flow [2024-06-20 16:26:35,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 408 transitions, 5311 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-20 16:26:35,977 INFO L231 Difference]: Finished difference. Result has 299 places, 387 transitions, 4560 flow [2024-06-20 16:26:35,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4403, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4560, PETRI_PLACES=299, PETRI_TRANSITIONS=387} [2024-06-20 16:26:35,978 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-20 16:26:35,978 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 387 transitions, 4560 flow [2024-06-20 16:26:35,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:35,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:26:35,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:26:35,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 16:26:35,978 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:26:35,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:26:35,979 INFO L85 PathProgramCache]: Analyzing trace with hash -396643396, now seen corresponding path program 3 times [2024-06-20 16:26:35,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:26:35,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435476726] [2024-06-20 16:26:35,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:26:35,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:26:35,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:26:36,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:26:36,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:26:36,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435476726] [2024-06-20 16:26:36,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435476726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:26:36,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:26:36,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:26:36,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695003022] [2024-06-20 16:26:36,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:26:36,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:26:36,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:26:36,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:26:36,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:26:36,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:26:36,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 387 transitions, 4560 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:36,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:26:36,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:26:36,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:26:38,036 INFO L124 PetriNetUnfolderBase]: 3169/5002 cut-off events. [2024-06-20 16:26:38,036 INFO L125 PetriNetUnfolderBase]: For 965778/965778 co-relation queries the response was YES. [2024-06-20 16:26:38,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53188 conditions, 5002 events. 3169/5002 cut-off events. For 965778/965778 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 28574 event pairs, 747 based on Foata normal form. 2/4995 useless extension candidates. Maximal degree in co-relation 53048. Up to 4659 conditions per place. [2024-06-20 16:26:38,103 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 342 selfloop transitions, 39 changer transitions 0/405 dead transitions. [2024-06-20 16:26:38,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 405 transitions, 5448 flow [2024-06-20 16:26:38,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:26:38,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:26:38,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 16:26:38,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-20 16:26:38,105 INFO L175 Difference]: Start difference. First operand has 299 places, 387 transitions, 4560 flow. Second operand 8 states and 133 transitions. [2024-06-20 16:26:38,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 405 transitions, 5448 flow [2024-06-20 16:26:39,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 405 transitions, 5300 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-20 16:26:39,895 INFO L231 Difference]: Finished difference. Result has 301 places, 389 transitions, 4577 flow [2024-06-20 16:26:39,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4412, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4577, PETRI_PLACES=301, PETRI_TRANSITIONS=389} [2024-06-20 16:26:39,896 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-20 16:26:39,896 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 389 transitions, 4577 flow [2024-06-20 16:26:39,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:39,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:26:39,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:26:39,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 16:26:39,897 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:26:39,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:26:39,897 INFO L85 PathProgramCache]: Analyzing trace with hash -396274000, now seen corresponding path program 1 times [2024-06-20 16:26:39,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:26:39,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041442974] [2024-06-20 16:26:39,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:26:39,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:26:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:26:40,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:26:40,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:26:40,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041442974] [2024-06-20 16:26:40,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041442974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:26:40,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:26:40,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:26:40,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580709836] [2024-06-20 16:26:40,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:26:40,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:26:40,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:26:40,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:26:40,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:26:40,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:26:40,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 389 transitions, 4577 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:40,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:26:40,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:26:40,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:26:42,218 INFO L124 PetriNetUnfolderBase]: 3047/4837 cut-off events. [2024-06-20 16:26:42,218 INFO L125 PetriNetUnfolderBase]: For 968546/968591 co-relation queries the response was YES. [2024-06-20 16:26:42,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52012 conditions, 4837 events. 3047/4837 cut-off events. For 968546/968591 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 27766 event pairs, 742 based on Foata normal form. 18/4821 useless extension candidates. Maximal degree in co-relation 51871. Up to 4425 conditions per place. [2024-06-20 16:26:42,283 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 311 selfloop transitions, 47 changer transitions 0/408 dead transitions. [2024-06-20 16:26:42,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 408 transitions, 5419 flow [2024-06-20 16:26:42,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:26:42,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:26:42,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-20 16:26:42,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 16:26:42,284 INFO L175 Difference]: Start difference. First operand has 301 places, 389 transitions, 4577 flow. Second operand 9 states and 144 transitions. [2024-06-20 16:26:42,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 408 transitions, 5419 flow [2024-06-20 16:26:44,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 408 transitions, 5270 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-20 16:26:44,944 INFO L231 Difference]: Finished difference. Result has 304 places, 392 transitions, 4612 flow [2024-06-20 16:26:44,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4428, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4612, PETRI_PLACES=304, PETRI_TRANSITIONS=392} [2024-06-20 16:26:44,944 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-20 16:26:44,945 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 392 transitions, 4612 flow [2024-06-20 16:26:44,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:44,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:26:44,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:26:44,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 16:26:44,945 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)] === [2024-06-20 16:26:44,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:26:44,946 INFO L85 PathProgramCache]: Analyzing trace with hash 273104856, now seen corresponding path program 7 times [2024-06-20 16:26:44,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:26:44,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819704466] [2024-06-20 16:26:44,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:26:44,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:26:44,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:26:45,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:26:45,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:26:45,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819704466] [2024-06-20 16:26:45,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819704466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:26:45,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:26:45,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:26:45,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084604661] [2024-06-20 16:26:45,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:26:45,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:26:45,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:26:45,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:26:45,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:26:45,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:26:45,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 392 transitions, 4612 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:45,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:26:45,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:26:45,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:26:47,086 INFO L124 PetriNetUnfolderBase]: 3184/5027 cut-off events. [2024-06-20 16:26:47,086 INFO L125 PetriNetUnfolderBase]: For 990905/990905 co-relation queries the response was YES. [2024-06-20 16:26:47,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54127 conditions, 5027 events. 3184/5027 cut-off events. For 990905/990905 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 28710 event pairs, 748 based on Foata normal form. 1/5019 useless extension candidates. Maximal degree in co-relation 53985. Up to 4588 conditions per place. [2024-06-20 16:26:47,147 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 326 selfloop transitions, 65 changer transitions 0/415 dead transitions. [2024-06-20 16:26:47,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 415 transitions, 5578 flow [2024-06-20 16:26:47,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:26:47,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:26:47,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 16:26:47,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-20 16:26:47,157 INFO L175 Difference]: Start difference. First operand has 304 places, 392 transitions, 4612 flow. Second operand 8 states and 138 transitions. [2024-06-20 16:26:47,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 415 transitions, 5578 flow [2024-06-20 16:26:49,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 415 transitions, 5416 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-20 16:26:49,507 INFO L231 Difference]: Finished difference. Result has 305 places, 395 transitions, 4704 flow [2024-06-20 16:26:49,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4450, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4704, PETRI_PLACES=305, PETRI_TRANSITIONS=395} [2024-06-20 16:26:49,507 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-20 16:26:49,507 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 395 transitions, 4704 flow [2024-06-20 16:26:49,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:49,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:26:49,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:26:49,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 16:26:49,508 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)] === [2024-06-20 16:26:49,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:26:49,510 INFO L85 PathProgramCache]: Analyzing trace with hash -712834560, now seen corresponding path program 4 times [2024-06-20 16:26:49,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:26:49,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162350668] [2024-06-20 16:26:49,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:26:49,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:26:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:26:50,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:26:50,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:26:50,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162350668] [2024-06-20 16:26:50,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162350668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:26:50,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:26:50,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:26:50,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262339044] [2024-06-20 16:26:50,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:26:50,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:26:50,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:26:50,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:26:50,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:26:50,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:26:50,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 395 transitions, 4704 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:50,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:26:50,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:26:50,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:26:51,624 INFO L124 PetriNetUnfolderBase]: 3194/5045 cut-off events. [2024-06-20 16:26:51,624 INFO L125 PetriNetUnfolderBase]: For 1017019/1017025 co-relation queries the response was YES. [2024-06-20 16:26:51,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54490 conditions, 5045 events. 3194/5045 cut-off events. For 1017019/1017025 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 28871 event pairs, 729 based on Foata normal form. 8/5044 useless extension candidates. Maximal degree in co-relation 54347. Up to 4574 conditions per place. [2024-06-20 16:26:51,696 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 326 selfloop transitions, 74 changer transitions 0/424 dead transitions. [2024-06-20 16:26:51,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 424 transitions, 5720 flow [2024-06-20 16:26:51,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:26:51,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:26:51,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 16:26:51,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-20 16:26:51,698 INFO L175 Difference]: Start difference. First operand has 305 places, 395 transitions, 4704 flow. Second operand 8 states and 141 transitions. [2024-06-20 16:26:51,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 424 transitions, 5720 flow [2024-06-20 16:26:54,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 424 transitions, 5494 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-20 16:26:54,322 INFO L231 Difference]: Finished difference. Result has 308 places, 403 transitions, 4785 flow [2024-06-20 16:26:54,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4478, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4785, PETRI_PLACES=308, PETRI_TRANSITIONS=403} [2024-06-20 16:26:54,325 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-20 16:26:54,326 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 403 transitions, 4785 flow [2024-06-20 16:26:54,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:54,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:26:54,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:26:54,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 16:26:54,326 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)] === [2024-06-20 16:26:54,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:26:54,327 INFO L85 PathProgramCache]: Analyzing trace with hash -80384730, now seen corresponding path program 5 times [2024-06-20 16:26:54,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:26:54,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802134317] [2024-06-20 16:26:54,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:26:54,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:26:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:26:55,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:26:55,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:26:55,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802134317] [2024-06-20 16:26:55,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802134317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:26:55,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:26:55,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:26:55,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627460997] [2024-06-20 16:26:55,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:26:55,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:26:55,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:26:55,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:26:55,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:26:55,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:26:55,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 403 transitions, 4785 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:55,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:26:55,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:26:55,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:26:56,327 INFO L124 PetriNetUnfolderBase]: 3204/5055 cut-off events. [2024-06-20 16:26:56,327 INFO L125 PetriNetUnfolderBase]: For 1035803/1035809 co-relation queries the response was YES. [2024-06-20 16:26:56,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55098 conditions, 5055 events. 3204/5055 cut-off events. For 1035803/1035809 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 28880 event pairs, 742 based on Foata normal form. 8/5054 useless extension candidates. Maximal degree in co-relation 54953. Up to 4558 conditions per place. [2024-06-20 16:26:56,395 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 321 selfloop transitions, 81 changer transitions 0/426 dead transitions. [2024-06-20 16:26:56,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 426 transitions, 5952 flow [2024-06-20 16:26:56,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:26:56,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:26:56,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 16:26:56,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-20 16:26:56,399 INFO L175 Difference]: Start difference. First operand has 308 places, 403 transitions, 4785 flow. Second operand 8 states and 141 transitions. [2024-06-20 16:26:56,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 426 transitions, 5952 flow [2024-06-20 16:26:58,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 426 transitions, 5764 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-20 16:26:59,003 INFO L231 Difference]: Finished difference. Result has 312 places, 406 transitions, 4851 flow [2024-06-20 16:26:59,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4597, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4851, PETRI_PLACES=312, PETRI_TRANSITIONS=406} [2024-06-20 16:26:59,004 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-20 16:26:59,004 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 406 transitions, 4851 flow [2024-06-20 16:26:59,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:59,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:26:59,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:26:59,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 16:26:59,005 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)] === [2024-06-20 16:26:59,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:26:59,005 INFO L85 PathProgramCache]: Analyzing trace with hash 273403386, now seen corresponding path program 8 times [2024-06-20 16:26:59,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:26:59,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703532880] [2024-06-20 16:26:59,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:26:59,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:26:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:26:59,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:26:59,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:26:59,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703532880] [2024-06-20 16:26:59,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703532880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:26:59,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:26:59,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:26:59,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589047583] [2024-06-20 16:26:59,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:26:59,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:26:59,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:26:59,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:26:59,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:27:00,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:27:00,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 406 transitions, 4851 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:00,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:27:00,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:27:00,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:27:01,193 INFO L124 PetriNetUnfolderBase]: 3201/5046 cut-off events. [2024-06-20 16:27:01,193 INFO L125 PetriNetUnfolderBase]: For 1044394/1044394 co-relation queries the response was YES. [2024-06-20 16:27:01,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55049 conditions, 5046 events. 3201/5046 cut-off events. For 1044394/1044394 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 28769 event pairs, 740 based on Foata normal form. 1/5038 useless extension candidates. Maximal degree in co-relation 54903. Up to 4604 conditions per place. [2024-06-20 16:27:01,265 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 331 selfloop transitions, 69 changer transitions 0/424 dead transitions. [2024-06-20 16:27:01,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 424 transitions, 5717 flow [2024-06-20 16:27:01,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:27:01,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:27:01,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 16:27:01,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-20 16:27:01,266 INFO L175 Difference]: Start difference. First operand has 312 places, 406 transitions, 4851 flow. Second operand 8 states and 137 transitions. [2024-06-20 16:27:01,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 424 transitions, 5717 flow [2024-06-20 16:27:04,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 424 transitions, 5446 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-20 16:27:04,261 INFO L231 Difference]: Finished difference. Result has 314 places, 406 transitions, 4724 flow [2024-06-20 16:27:04,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4580, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4724, PETRI_PLACES=314, PETRI_TRANSITIONS=406} [2024-06-20 16:27:04,262 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-20 16:27:04,262 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 406 transitions, 4724 flow [2024-06-20 16:27:04,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:04,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:27:04,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:27:04,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 16:27:04,263 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)] === [2024-06-20 16:27:04,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:27:04,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1087153378, now seen corresponding path program 6 times [2024-06-20 16:27:04,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:27:04,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691007940] [2024-06-20 16:27:04,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:27:04,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:27:04,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:27:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:27:05,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:27:05,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691007940] [2024-06-20 16:27:05,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691007940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:27:05,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:27:05,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:27:05,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990552648] [2024-06-20 16:27:05,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:27:05,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:27:05,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:27:05,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:27:05,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:27:05,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:27:05,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 406 transitions, 4724 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:05,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:27:05,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:27:05,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:27:06,252 INFO L124 PetriNetUnfolderBase]: 3203/5053 cut-off events. [2024-06-20 16:27:06,253 INFO L125 PetriNetUnfolderBase]: For 1062823/1062829 co-relation queries the response was YES. [2024-06-20 16:27:06,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54976 conditions, 5053 events. 3203/5053 cut-off events. For 1062823/1062829 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 28876 event pairs, 736 based on Foata normal form. 8/5052 useless extension candidates. Maximal degree in co-relation 54829. Up to 4587 conditions per place. [2024-06-20 16:27:06,323 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 328 selfloop transitions, 83 changer transitions 0/435 dead transitions. [2024-06-20 16:27:06,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 435 transitions, 5768 flow [2024-06-20 16:27:06,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:27:06,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:27:06,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 16:27:06,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-20 16:27:06,324 INFO L175 Difference]: Start difference. First operand has 314 places, 406 transitions, 4724 flow. Second operand 8 states and 139 transitions. [2024-06-20 16:27:06,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 435 transitions, 5768 flow [2024-06-20 16:27:09,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 435 transitions, 5418 flow, removed 56 selfloop flow, removed 8 redundant places. [2024-06-20 16:27:09,314 INFO L231 Difference]: Finished difference. Result has 315 places, 414 transitions, 4703 flow [2024-06-20 16:27:09,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4374, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4703, PETRI_PLACES=315, PETRI_TRANSITIONS=414} [2024-06-20 16:27:09,314 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-20 16:27:09,314 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 414 transitions, 4703 flow [2024-06-20 16:27:09,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:09,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:27:09,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:27:09,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 16:27:09,315 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)] === [2024-06-20 16:27:09,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:27:09,315 INFO L85 PathProgramCache]: Analyzing trace with hash 273403758, now seen corresponding path program 4 times [2024-06-20 16:27:09,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:27:09,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340702821] [2024-06-20 16:27:09,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:27:09,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:27:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:27:10,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:27:10,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:27:10,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340702821] [2024-06-20 16:27:10,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340702821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:27:10,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:27:10,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:27:10,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66171143] [2024-06-20 16:27:10,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:27:10,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:27:10,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:27:10,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:27:10,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:27:10,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:27:10,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 414 transitions, 4703 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:10,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:27:10,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:27:10,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:27:11,392 INFO L124 PetriNetUnfolderBase]: 3278/5120 cut-off events. [2024-06-20 16:27:11,392 INFO L125 PetriNetUnfolderBase]: For 1063108/1063114 co-relation queries the response was YES. [2024-06-20 16:27:11,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55073 conditions, 5120 events. 3278/5120 cut-off events. For 1063108/1063114 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 28770 event pairs, 787 based on Foata normal form. 7/5126 useless extension candidates. Maximal degree in co-relation 54925. Up to 4915 conditions per place. [2024-06-20 16:27:11,471 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 387 selfloop transitions, 41 changer transitions 0/432 dead transitions. [2024-06-20 16:27:11,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 432 transitions, 5639 flow [2024-06-20 16:27:11,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:27:11,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:27:11,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-20 16:27:11,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35978835978835977 [2024-06-20 16:27:11,472 INFO L175 Difference]: Start difference. First operand has 315 places, 414 transitions, 4703 flow. Second operand 9 states and 136 transitions. [2024-06-20 16:27:11,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 432 transitions, 5639 flow [2024-06-20 16:27:14,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 432 transitions, 5406 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-20 16:27:14,265 INFO L231 Difference]: Finished difference. Result has 320 places, 415 transitions, 4580 flow [2024-06-20 16:27:14,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4482, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4580, PETRI_PLACES=320, PETRI_TRANSITIONS=415} [2024-06-20 16:27:14,265 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-20 16:27:14,265 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 415 transitions, 4580 flow [2024-06-20 16:27:14,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:14,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:27:14,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:27:14,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 16:27:14,266 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)] === [2024-06-20 16:27:14,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:27:14,266 INFO L85 PathProgramCache]: Analyzing trace with hash 512612592, now seen corresponding path program 7 times [2024-06-20 16:27:14,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:27:14,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505220851] [2024-06-20 16:27:14,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:27:14,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:27:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:27:15,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:27:15,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:27:15,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505220851] [2024-06-20 16:27:15,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505220851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:27:15,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:27:15,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:27:15,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262590263] [2024-06-20 16:27:15,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:27:15,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:27:15,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:27:15,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:27:15,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:27:15,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:27:15,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 415 transitions, 4580 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:15,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:27:15,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:27:15,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:27:16,460 INFO L124 PetriNetUnfolderBase]: 3215/5068 cut-off events. [2024-06-20 16:27:16,460 INFO L125 PetriNetUnfolderBase]: For 1096594/1096602 co-relation queries the response was YES. [2024-06-20 16:27:16,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54961 conditions, 5068 events. 3215/5068 cut-off events. For 1096594/1096602 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 28990 event pairs, 734 based on Foata normal form. 8/5062 useless extension candidates. Maximal degree in co-relation 54812. Up to 4571 conditions per place. [2024-06-20 16:27:16,527 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 319 selfloop transitions, 94 changer transitions 0/437 dead transitions. [2024-06-20 16:27:16,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 437 transitions, 5585 flow [2024-06-20 16:27:16,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:27:16,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:27:16,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 16:27:16,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-20 16:27:16,529 INFO L175 Difference]: Start difference. First operand has 320 places, 415 transitions, 4580 flow. Second operand 8 states and 138 transitions. [2024-06-20 16:27:16,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 437 transitions, 5585 flow [2024-06-20 16:27:19,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 437 transitions, 5497 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 16:27:19,553 INFO L231 Difference]: Finished difference. Result has 321 places, 418 transitions, 4792 flow [2024-06-20 16:27:19,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4492, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4792, PETRI_PLACES=321, PETRI_TRANSITIONS=418} [2024-06-20 16:27:19,553 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-20 16:27:19,553 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 418 transitions, 4792 flow [2024-06-20 16:27:19,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:19,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:27:19,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:27:19,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 16:27:19,554 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)] === [2024-06-20 16:27:19,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:27:19,554 INFO L85 PathProgramCache]: Analyzing trace with hash 2142171222, now seen corresponding path program 8 times [2024-06-20 16:27:19,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:27:19,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583048775] [2024-06-20 16:27:19,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:27:19,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:27:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:27:20,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:27:20,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:27:20,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583048775] [2024-06-20 16:27:20,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583048775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:27:20,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:27:20,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:27:20,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542352470] [2024-06-20 16:27:20,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:27:20,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:27:20,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:27:20,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:27:20,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:27:20,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:27:20,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 418 transitions, 4792 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:20,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:27:20,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:27:20,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:27:21,747 INFO L124 PetriNetUnfolderBase]: 3247/5113 cut-off events. [2024-06-20 16:27:21,747 INFO L125 PetriNetUnfolderBase]: For 1141879/1141890 co-relation queries the response was YES. [2024-06-20 16:27:21,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56763 conditions, 5113 events. 3247/5113 cut-off events. For 1141879/1141890 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 29206 event pairs, 743 based on Foata normal form. 11/5114 useless extension candidates. Maximal degree in co-relation 56613. Up to 4536 conditions per place. [2024-06-20 16:27:21,946 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 300 selfloop transitions, 121 changer transitions 0/445 dead transitions. [2024-06-20 16:27:21,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 445 transitions, 6442 flow [2024-06-20 16:27:21,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:27:21,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:27:21,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 16:27:21,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 16:27:21,948 INFO L175 Difference]: Start difference. First operand has 321 places, 418 transitions, 4792 flow. Second operand 8 states and 140 transitions. [2024-06-20 16:27:21,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 445 transitions, 6442 flow [2024-06-20 16:27:24,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 445 transitions, 6164 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-20 16:27:24,812 INFO L231 Difference]: Finished difference. Result has 323 places, 427 transitions, 5086 flow [2024-06-20 16:27:24,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4514, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5086, PETRI_PLACES=323, PETRI_TRANSITIONS=427} [2024-06-20 16:27:24,813 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-20 16:27:24,813 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 427 transitions, 5086 flow [2024-06-20 16:27:24,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:24,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:27:24,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:27:24,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 16:27:24,813 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)] === [2024-06-20 16:27:24,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:27:24,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1794689678, now seen corresponding path program 5 times [2024-06-20 16:27:24,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:27:24,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474425086] [2024-06-20 16:27:24,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:27:24,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:27:24,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:27:25,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:27:25,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:27:25,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474425086] [2024-06-20 16:27:25,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474425086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:27:25,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:27:25,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:27:25,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375344119] [2024-06-20 16:27:25,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:27:25,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:27:25,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:27:25,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:27:25,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:27:25,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:27:25,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 427 transitions, 5086 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:25,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:27:25,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:27:25,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:27:26,972 INFO L124 PetriNetUnfolderBase]: 3335/5208 cut-off events. [2024-06-20 16:27:26,972 INFO L125 PetriNetUnfolderBase]: For 1156451/1156457 co-relation queries the response was YES. [2024-06-20 16:27:27,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57841 conditions, 5208 events. 3335/5208 cut-off events. For 1156451/1156457 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 29377 event pairs, 770 based on Foata normal form. 7/5214 useless extension candidates. Maximal degree in co-relation 57690. Up to 4966 conditions per place. [2024-06-20 16:27:27,055 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 388 selfloop transitions, 56 changer transitions 0/448 dead transitions. [2024-06-20 16:27:27,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 448 transitions, 6429 flow [2024-06-20 16:27:27,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:27:27,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:27:27,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-20 16:27:27,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-20 16:27:27,056 INFO L175 Difference]: Start difference. First operand has 323 places, 427 transitions, 5086 flow. Second operand 8 states and 127 transitions. [2024-06-20 16:27:27,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 448 transitions, 6429 flow [2024-06-20 16:27:30,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 448 transitions, 6230 flow, removed 62 selfloop flow, removed 3 redundant places. [2024-06-20 16:27:30,550 INFO L231 Difference]: Finished difference. Result has 328 places, 433 transitions, 5207 flow [2024-06-20 16:27:30,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4887, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5207, PETRI_PLACES=328, PETRI_TRANSITIONS=433} [2024-06-20 16:27:30,551 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-20 16:27:30,551 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 433 transitions, 5207 flow [2024-06-20 16:27:30,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:30,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:27:30,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:27:30,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 16:27:30,551 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)] === [2024-06-20 16:27:30,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:27:30,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1794273968, now seen corresponding path program 6 times [2024-06-20 16:27:30,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:27:30,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857348953] [2024-06-20 16:27:30,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:27:30,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:27:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:27:31,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:27:31,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:27:31,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857348953] [2024-06-20 16:27:31,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857348953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:27:31,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:27:31,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:27:31,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135247049] [2024-06-20 16:27:31,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:27:31,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:27:31,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:27:31,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:27:31,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:27:31,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:27:31,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 433 transitions, 5207 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:31,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:27:31,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:27:31,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:27:32,584 INFO L124 PetriNetUnfolderBase]: 3332/5204 cut-off events. [2024-06-20 16:27:32,584 INFO L125 PetriNetUnfolderBase]: For 1172159/1172165 co-relation queries the response was YES. [2024-06-20 16:27:32,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58089 conditions, 5204 events. 3332/5204 cut-off events. For 1172159/1172165 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 29382 event pairs, 770 based on Foata normal form. 7/5210 useless extension candidates. Maximal degree in co-relation 57936. Up to 4963 conditions per place. [2024-06-20 16:27:32,657 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 385 selfloop transitions, 58 changer transitions 0/447 dead transitions. [2024-06-20 16:27:32,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 447 transitions, 6140 flow [2024-06-20 16:27:32,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:27:32,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:27:32,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-20 16:27:32,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-20 16:27:32,659 INFO L175 Difference]: Start difference. First operand has 328 places, 433 transitions, 5207 flow. Second operand 8 states and 125 transitions. [2024-06-20 16:27:32,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 447 transitions, 6140 flow [2024-06-20 16:27:35,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 447 transitions, 5907 flow, removed 87 selfloop flow, removed 4 redundant places. [2024-06-20 16:27:35,983 INFO L231 Difference]: Finished difference. Result has 332 places, 433 transitions, 5096 flow [2024-06-20 16:27:35,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4974, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5096, PETRI_PLACES=332, PETRI_TRANSITIONS=433} [2024-06-20 16:27:35,983 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-20 16:27:35,983 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 433 transitions, 5096 flow [2024-06-20 16:27:35,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:35,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:27:35,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:27:35,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 16:27:35,984 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)] === [2024-06-20 16:27:35,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:27:35,991 INFO L85 PathProgramCache]: Analyzing trace with hash 627666426, now seen corresponding path program 9 times [2024-06-20 16:27:35,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:27:35,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010134448] [2024-06-20 16:27:35,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:27:35,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:27:36,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:27:36,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:27:36,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:27:36,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010134448] [2024-06-20 16:27:36,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010134448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:27:36,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:27:36,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:27:36,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571428293] [2024-06-20 16:27:36,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:27:36,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:27:36,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:27:36,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:27:36,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:27:36,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:27:36,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 433 transitions, 5096 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:36,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:27:36,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:27:36,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:27:38,063 INFO L124 PetriNetUnfolderBase]: 3259/5127 cut-off events. [2024-06-20 16:27:38,064 INFO L125 PetriNetUnfolderBase]: For 1195729/1195729 co-relation queries the response was YES. [2024-06-20 16:27:38,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57977 conditions, 5127 events. 3259/5127 cut-off events. For 1195729/1195729 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 29217 event pairs, 746 based on Foata normal form. 1/5119 useless extension candidates. Maximal degree in co-relation 57822. Up to 4645 conditions per place. [2024-06-20 16:27:38,139 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 335 selfloop transitions, 90 changer transitions 0/451 dead transitions. [2024-06-20 16:27:38,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 451 transitions, 6343 flow [2024-06-20 16:27:38,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:27:38,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:27:38,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 16:27:38,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-20 16:27:38,140 INFO L175 Difference]: Start difference. First operand has 332 places, 433 transitions, 5096 flow. Second operand 8 states and 135 transitions. [2024-06-20 16:27:38,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 451 transitions, 6343 flow [2024-06-20 16:27:41,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 451 transitions, 6213 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 16:27:42,004 INFO L231 Difference]: Finished difference. Result has 333 places, 436 transitions, 5292 flow [2024-06-20 16:27:42,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4966, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5292, PETRI_PLACES=333, PETRI_TRANSITIONS=436} [2024-06-20 16:27:42,005 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-20 16:27:42,005 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 436 transitions, 5292 flow [2024-06-20 16:27:42,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:42,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:27:42,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:27:42,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 16:27:42,005 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)] === [2024-06-20 16:27:42,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:27:42,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1794689864, now seen corresponding path program 9 times [2024-06-20 16:27:42,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:27:42,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487309845] [2024-06-20 16:27:42,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:27:42,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:27:42,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:27:42,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:27:42,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:27:42,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487309845] [2024-06-20 16:27:42,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487309845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:27:42,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:27:42,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:27:42,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974230987] [2024-06-20 16:27:42,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:27:42,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:27:42,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:27:42,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:27:42,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:27:42,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:27:42,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 436 transitions, 5292 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:42,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:27:42,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:27:42,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:27:44,047 INFO L124 PetriNetUnfolderBase]: 3256/5128 cut-off events. [2024-06-20 16:27:44,047 INFO L125 PetriNetUnfolderBase]: For 1222949/1222957 co-relation queries the response was YES. [2024-06-20 16:27:44,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58526 conditions, 5128 events. 3256/5128 cut-off events. For 1222949/1222957 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 29321 event pairs, 740 based on Foata normal form. 8/5122 useless extension candidates. Maximal degree in co-relation 58370. Up to 4548 conditions per place. [2024-06-20 16:27:44,121 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 307 selfloop transitions, 121 changer transitions 0/454 dead transitions. [2024-06-20 16:27:44,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 454 transitions, 6654 flow [2024-06-20 16:27:44,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:27:44,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:27:44,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 16:27:44,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 16:27:44,123 INFO L175 Difference]: Start difference. First operand has 333 places, 436 transitions, 5292 flow. Second operand 8 states and 140 transitions. [2024-06-20 16:27:44,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 454 transitions, 6654 flow [2024-06-20 16:27:46,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 454 transitions, 6284 flow, removed 97 selfloop flow, removed 6 redundant places. [2024-06-20 16:27:46,890 INFO L231 Difference]: Finished difference. Result has 335 places, 436 transitions, 5170 flow [2024-06-20 16:27:46,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4922, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5170, PETRI_PLACES=335, PETRI_TRANSITIONS=436} [2024-06-20 16:27:46,890 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-20 16:27:46,890 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 436 transitions, 5170 flow [2024-06-20 16:27:46,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:46,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:27:46,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:27:46,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 16:27:46,891 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)] === [2024-06-20 16:27:46,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:27:46,891 INFO L85 PathProgramCache]: Analyzing trace with hash -263180414, now seen corresponding path program 7 times [2024-06-20 16:27:46,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:27:46,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634834807] [2024-06-20 16:27:46,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:27:46,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:27:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:27:47,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:27:47,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:27:47,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634834807] [2024-06-20 16:27:47,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634834807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:27:47,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:27:47,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:27:47,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870247797] [2024-06-20 16:27:47,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:27:47,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:27:47,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:27:47,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:27:47,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:27:47,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:27:47,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 436 transitions, 5170 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:47,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:27:47,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:27:47,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:27:48,945 INFO L124 PetriNetUnfolderBase]: 3344/5232 cut-off events. [2024-06-20 16:27:48,945 INFO L125 PetriNetUnfolderBase]: For 1232762/1232772 co-relation queries the response was YES. [2024-06-20 16:27:49,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59221 conditions, 5232 events. 3344/5232 cut-off events. For 1232762/1232772 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 29730 event pairs, 771 based on Foata normal form. 11/5242 useless extension candidates. Maximal degree in co-relation 59064. Up to 4914 conditions per place. [2024-06-20 16:27:49,028 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 360 selfloop transitions, 98 changer transitions 0/462 dead transitions. [2024-06-20 16:27:49,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 462 transitions, 6905 flow [2024-06-20 16:27:49,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:27:49,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:27:49,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-20 16:27:49,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-20 16:27:49,029 INFO L175 Difference]: Start difference. First operand has 335 places, 436 transitions, 5170 flow. Second operand 8 states and 127 transitions. [2024-06-20 16:27:49,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 462 transitions, 6905 flow [2024-06-20 16:27:52,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 462 transitions, 6627 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-20 16:27:52,342 INFO L231 Difference]: Finished difference. Result has 339 places, 448 transitions, 5499 flow [2024-06-20 16:27:52,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4892, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5499, PETRI_PLACES=339, PETRI_TRANSITIONS=448} [2024-06-20 16:27:52,342 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-20 16:27:52,343 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 448 transitions, 5499 flow [2024-06-20 16:27:52,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:52,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:27:52,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:27:52,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 16:27:52,343 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)] === [2024-06-20 16:27:52,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:27:52,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1153293358, now seen corresponding path program 8 times [2024-06-20 16:27:52,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:27:52,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242994359] [2024-06-20 16:27:52,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:27:52,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:27:52,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:27:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:27:53,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:27:53,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242994359] [2024-06-20 16:27:53,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242994359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:27:53,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:27:53,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:27:53,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314376748] [2024-06-20 16:27:53,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:27:53,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:27:53,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:27:53,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:27:53,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:27:53,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:27:53,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 448 transitions, 5499 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:53,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:27:53,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:27:53,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:27:54,488 INFO L124 PetriNetUnfolderBase]: 3357/5243 cut-off events. [2024-06-20 16:27:54,488 INFO L125 PetriNetUnfolderBase]: For 1264218/1264228 co-relation queries the response was YES. [2024-06-20 16:27:54,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60036 conditions, 5243 events. 3357/5243 cut-off events. For 1264218/1264228 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 29664 event pairs, 778 based on Foata normal form. 11/5253 useless extension candidates. Maximal degree in co-relation 59876. Up to 4929 conditions per place. [2024-06-20 16:27:54,568 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 360 selfloop transitions, 104 changer transitions 0/468 dead transitions. [2024-06-20 16:27:54,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 468 transitions, 7142 flow [2024-06-20 16:27:54,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:27:54,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:27:54,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-20 16:27:54,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-20 16:27:54,569 INFO L175 Difference]: Start difference. First operand has 339 places, 448 transitions, 5499 flow. Second operand 8 states and 127 transitions. [2024-06-20 16:27:54,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 468 transitions, 7142 flow [2024-06-20 16:27:58,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 468 transitions, 6861 flow, removed 107 selfloop flow, removed 3 redundant places. [2024-06-20 16:27:58,385 INFO L231 Difference]: Finished difference. Result has 345 places, 455 transitions, 5715 flow [2024-06-20 16:27:58,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5272, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5715, PETRI_PLACES=345, PETRI_TRANSITIONS=455} [2024-06-20 16:27:58,386 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-20 16:27:58,386 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 455 transitions, 5715 flow [2024-06-20 16:27:58,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:58,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:27:58,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:27:58,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 16:27:58,386 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:27:58,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:27:58,387 INFO L85 PathProgramCache]: Analyzing trace with hash -269638520, now seen corresponding path program 10 times [2024-06-20 16:27:58,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:27:58,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074579541] [2024-06-20 16:27:58,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:27:58,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:27:58,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:27:59,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:27:59,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:27:59,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074579541] [2024-06-20 16:27:59,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074579541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:27:59,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:27:59,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:27:59,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282977888] [2024-06-20 16:27:59,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:27:59,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:27:59,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:27:59,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:27:59,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:27:59,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:27:59,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 455 transitions, 5715 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:27:59,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:27:59,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:27:59,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:00,621 INFO L124 PetriNetUnfolderBase]: 3296/5195 cut-off events. [2024-06-20 16:28:00,621 INFO L125 PetriNetUnfolderBase]: For 1298219/1298229 co-relation queries the response was YES. [2024-06-20 16:28:00,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60092 conditions, 5195 events. 3296/5195 cut-off events. For 1298219/1298229 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 29923 event pairs, 794 based on Foata normal form. 8/5197 useless extension candidates. Maximal degree in co-relation 59929. Up to 4538 conditions per place. [2024-06-20 16:28:00,696 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 300 selfloop transitions, 143 changer transitions 0/476 dead transitions. [2024-06-20 16:28:00,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 476 transitions, 7339 flow [2024-06-20 16:28:00,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:28:00,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:28:00,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 16:28:00,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-20 16:28:00,703 INFO L175 Difference]: Start difference. First operand has 345 places, 455 transitions, 5715 flow. Second operand 8 states and 139 transitions. [2024-06-20 16:28:00,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 476 transitions, 7339 flow [2024-06-20 16:28:04,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 476 transitions, 7122 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-20 16:28:04,641 INFO L231 Difference]: Finished difference. Result has 349 places, 461 transitions, 6028 flow [2024-06-20 16:28:04,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5498, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6028, PETRI_PLACES=349, PETRI_TRANSITIONS=461} [2024-06-20 16:28:04,642 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-20 16:28:04,642 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 461 transitions, 6028 flow [2024-06-20 16:28:04,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:04,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:04,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:04,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 16:28:04,643 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:28:04,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:04,643 INFO L85 PathProgramCache]: Analyzing trace with hash 925392208, now seen corresponding path program 9 times [2024-06-20 16:28:04,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:04,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668467876] [2024-06-20 16:28:04,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:04,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:04,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:05,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:05,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:05,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668467876] [2024-06-20 16:28:05,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668467876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:05,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:05,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:28:05,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275125479] [2024-06-20 16:28:05,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:05,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:28:05,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:05,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:28:05,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:28:05,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:28:05,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 461 transitions, 6028 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:05,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:05,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:28:05,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:06,905 INFO L124 PetriNetUnfolderBase]: 3364/5259 cut-off events. [2024-06-20 16:28:06,905 INFO L125 PetriNetUnfolderBase]: For 1301981/1301991 co-relation queries the response was YES. [2024-06-20 16:28:06,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60780 conditions, 5259 events. 3364/5259 cut-off events. For 1301981/1301991 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 29869 event pairs, 781 based on Foata normal form. 11/5269 useless extension candidates. Maximal degree in co-relation 60616. Up to 4940 conditions per place. [2024-06-20 16:28:06,978 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 370 selfloop transitions, 102 changer transitions 0/476 dead transitions. [2024-06-20 16:28:06,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 476 transitions, 7511 flow [2024-06-20 16:28:06,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:28:06,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:28:06,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-20 16:28:06,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 16:28:06,980 INFO L175 Difference]: Start difference. First operand has 349 places, 461 transitions, 6028 flow. Second operand 8 states and 128 transitions. [2024-06-20 16:28:06,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 476 transitions, 7511 flow [2024-06-20 16:28:11,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 476 transitions, 7031 flow, removed 115 selfloop flow, removed 5 redundant places. [2024-06-20 16:28:11,605 INFO L231 Difference]: Finished difference. Result has 352 places, 463 transitions, 5810 flow [2024-06-20 16:28:11,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5564, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5810, PETRI_PLACES=352, PETRI_TRANSITIONS=463} [2024-06-20 16:28:11,605 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-20 16:28:11,605 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 463 transitions, 5810 flow [2024-06-20 16:28:11,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:11,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:11,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:11,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 16:28:11,606 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:28:11,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:11,606 INFO L85 PathProgramCache]: Analyzing trace with hash 924976498, now seen corresponding path program 10 times [2024-06-20 16:28:11,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:11,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995950382] [2024-06-20 16:28:11,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:11,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:12,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:12,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:12,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995950382] [2024-06-20 16:28:12,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995950382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:12,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:12,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:28:12,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612305424] [2024-06-20 16:28:12,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:12,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:28:12,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:12,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:28:12,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:28:12,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:28:12,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 463 transitions, 5810 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:12,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:12,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:28:12,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:13,809 INFO L124 PetriNetUnfolderBase]: 3369/5260 cut-off events. [2024-06-20 16:28:13,809 INFO L125 PetriNetUnfolderBase]: For 1310289/1310299 co-relation queries the response was YES. [2024-06-20 16:28:13,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59889 conditions, 5260 events. 3369/5260 cut-off events. For 1310289/1310299 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 29798 event pairs, 781 based on Foata normal form. 11/5270 useless extension candidates. Maximal degree in co-relation 59724. Up to 4946 conditions per place. [2024-06-20 16:28:13,884 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 370 selfloop transitions, 104 changer transitions 0/478 dead transitions. [2024-06-20 16:28:13,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 478 transitions, 7128 flow [2024-06-20 16:28:13,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:28:13,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:28:13,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-20 16:28:13,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-20 16:28:13,886 INFO L175 Difference]: Start difference. First operand has 352 places, 463 transitions, 5810 flow. Second operand 8 states and 127 transitions. [2024-06-20 16:28:13,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 478 transitions, 7128 flow [2024-06-20 16:28:17,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 478 transitions, 6952 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-20 16:28:17,962 INFO L231 Difference]: Finished difference. Result has 356 places, 466 transitions, 5955 flow [2024-06-20 16:28:17,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5645, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5955, PETRI_PLACES=356, PETRI_TRANSITIONS=466} [2024-06-20 16:28:17,963 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-20 16:28:17,963 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 466 transitions, 5955 flow [2024-06-20 16:28:17,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:17,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:17,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:17,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 16:28:17,963 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:28:17,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:17,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1648228978, now seen corresponding path program 10 times [2024-06-20 16:28:17,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:17,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969599447] [2024-06-20 16:28:17,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:17,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:17,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:18,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:18,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:18,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969599447] [2024-06-20 16:28:18,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969599447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:18,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:18,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:28:18,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623774745] [2024-06-20 16:28:18,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:18,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:28:18,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:18,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:28:18,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:28:18,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:28:18,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 466 transitions, 5955 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:18,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:18,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:28:18,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:20,299 INFO L124 PetriNetUnfolderBase]: 3300/5189 cut-off events. [2024-06-20 16:28:20,299 INFO L125 PetriNetUnfolderBase]: For 1337292/1337296 co-relation queries the response was YES. [2024-06-20 16:28:20,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59890 conditions, 5189 events. 3300/5189 cut-off events. For 1337292/1337296 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 29684 event pairs, 784 based on Foata normal form. 5/5193 useless extension candidates. Maximal degree in co-relation 59724. Up to 4630 conditions per place. [2024-06-20 16:28:20,368 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 329 selfloop transitions, 122 changer transitions 0/485 dead transitions. [2024-06-20 16:28:20,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 485 transitions, 7628 flow [2024-06-20 16:28:20,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:28:20,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:28:20,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-20 16:28:20,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-20 16:28:20,371 INFO L175 Difference]: Start difference. First operand has 356 places, 466 transitions, 5955 flow. Second operand 9 states and 147 transitions. [2024-06-20 16:28:20,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 485 transitions, 7628 flow [2024-06-20 16:28:23,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 485 transitions, 7386 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-20 16:28:23,948 INFO L231 Difference]: Finished difference. Result has 360 places, 472 transitions, 6245 flow [2024-06-20 16:28:23,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5713, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6245, PETRI_PLACES=360, PETRI_TRANSITIONS=472} [2024-06-20 16:28:23,949 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-20 16:28:23,949 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 472 transitions, 6245 flow [2024-06-20 16:28:23,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:23,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:23,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:23,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 16:28:23,949 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:28:23,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:23,950 INFO L85 PathProgramCache]: Analyzing trace with hash -269645030, now seen corresponding path program 11 times [2024-06-20 16:28:23,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:23,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832697476] [2024-06-20 16:28:23,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:23,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:23,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:24,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:24,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832697476] [2024-06-20 16:28:24,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832697476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:24,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:24,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:28:24,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282874096] [2024-06-20 16:28:24,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:24,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:28:24,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:24,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:28:24,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:28:24,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:28:24,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 472 transitions, 6245 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:24,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:24,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:28:24,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:26,337 INFO L124 PetriNetUnfolderBase]: 3311/5213 cut-off events. [2024-06-20 16:28:26,337 INFO L125 PetriNetUnfolderBase]: For 1381785/1381795 co-relation queries the response was YES. [2024-06-20 16:28:26,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60827 conditions, 5213 events. 3311/5213 cut-off events. For 1381785/1381795 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 29944 event pairs, 794 based on Foata normal form. 8/5215 useless extension candidates. Maximal degree in co-relation 60660. Up to 4555 conditions per place. [2024-06-20 16:28:26,408 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 313 selfloop transitions, 144 changer transitions 0/491 dead transitions. [2024-06-20 16:28:26,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 491 transitions, 7779 flow [2024-06-20 16:28:26,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:28:26,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:28:26,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 16:28:26,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-20 16:28:26,410 INFO L175 Difference]: Start difference. First operand has 360 places, 472 transitions, 6245 flow. Second operand 8 states and 141 transitions. [2024-06-20 16:28:26,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 491 transitions, 7779 flow [2024-06-20 16:28:31,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 491 transitions, 7497 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-20 16:28:31,136 INFO L231 Difference]: Finished difference. Result has 363 places, 475 transitions, 6345 flow [2024-06-20 16:28:31,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5963, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6345, PETRI_PLACES=363, PETRI_TRANSITIONS=475} [2024-06-20 16:28:31,136 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-20 16:28:31,136 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 475 transitions, 6345 flow [2024-06-20 16:28:31,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:31,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:31,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:31,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 16:28:31,137 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)] === [2024-06-20 16:28:31,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:31,137 INFO L85 PathProgramCache]: Analyzing trace with hash -276073934, now seen corresponding path program 11 times [2024-06-20 16:28:31,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:31,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030372687] [2024-06-20 16:28:31,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:31,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:31,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:32,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:32,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:32,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030372687] [2024-06-20 16:28:32,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030372687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:32,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:32,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:28:32,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269071729] [2024-06-20 16:28:32,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:32,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:28:32,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:32,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:28:32,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:28:32,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:28:32,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 475 transitions, 6345 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:32,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:32,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:28:32,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:33,367 INFO L124 PetriNetUnfolderBase]: 3381/5283 cut-off events. [2024-06-20 16:28:33,368 INFO L125 PetriNetUnfolderBase]: For 1370589/1370599 co-relation queries the response was YES. [2024-06-20 16:28:33,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60885 conditions, 5283 events. 3381/5283 cut-off events. For 1370589/1370599 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 30032 event pairs, 781 based on Foata normal form. 11/5293 useless extension candidates. Maximal degree in co-relation 60716. Up to 4964 conditions per place. [2024-06-20 16:28:33,443 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 379 selfloop transitions, 104 changer transitions 0/487 dead transitions. [2024-06-20 16:28:33,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 487 transitions, 7580 flow [2024-06-20 16:28:33,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:28:33,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:28:33,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-20 16:28:33,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-20 16:28:33,445 INFO L175 Difference]: Start difference. First operand has 363 places, 475 transitions, 6345 flow. Second operand 8 states and 127 transitions. [2024-06-20 16:28:33,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 487 transitions, 7580 flow [2024-06-20 16:28:37,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 487 transitions, 7176 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-20 16:28:37,129 INFO L231 Difference]: Finished difference. Result has 366 places, 475 transitions, 6155 flow [2024-06-20 16:28:37,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5941, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6155, PETRI_PLACES=366, PETRI_TRANSITIONS=475} [2024-06-20 16:28:37,129 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-20 16:28:37,130 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 475 transitions, 6155 flow [2024-06-20 16:28:37,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:37,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:37,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:37,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 16:28:37,130 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)] === [2024-06-20 16:28:37,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:37,130 INFO L85 PathProgramCache]: Analyzing trace with hash 748082128, now seen corresponding path program 12 times [2024-06-20 16:28:37,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:37,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751183646] [2024-06-20 16:28:37,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:37,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:37,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:38,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:38,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:38,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751183646] [2024-06-20 16:28:38,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751183646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:38,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:38,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:28:38,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115662700] [2024-06-20 16:28:38,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:38,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:28:38,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:38,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:28:38,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:28:38,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:28:38,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 475 transitions, 6155 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:38,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:38,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:28:38,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:39,430 INFO L124 PetriNetUnfolderBase]: 3378/5275 cut-off events. [2024-06-20 16:28:39,431 INFO L125 PetriNetUnfolderBase]: For 1383635/1383645 co-relation queries the response was YES. [2024-06-20 16:28:39,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60546 conditions, 5275 events. 3378/5275 cut-off events. For 1383635/1383645 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 29937 event pairs, 781 based on Foata normal form. 11/5285 useless extension candidates. Maximal degree in co-relation 60376. Up to 4961 conditions per place. [2024-06-20 16:28:39,501 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 377 selfloop transitions, 105 changer transitions 0/486 dead transitions. [2024-06-20 16:28:39,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 486 transitions, 7154 flow [2024-06-20 16:28:39,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:28:39,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:28:39,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-20 16:28:39,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 16:28:39,503 INFO L175 Difference]: Start difference. First operand has 366 places, 475 transitions, 6155 flow. Second operand 8 states and 126 transitions. [2024-06-20 16:28:39,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 486 transitions, 7154 flow [2024-06-20 16:28:44,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 486 transitions, 6856 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-20 16:28:44,554 INFO L231 Difference]: Finished difference. Result has 368 places, 475 transitions, 6073 flow [2024-06-20 16:28:44,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5857, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6073, PETRI_PLACES=368, PETRI_TRANSITIONS=475} [2024-06-20 16:28:44,555 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-20 16:28:44,555 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 475 transitions, 6073 flow [2024-06-20 16:28:44,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:44,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:44,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:44,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 16:28:44,555 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)] === [2024-06-20 16:28:44,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:44,556 INFO L85 PathProgramCache]: Analyzing trace with hash 747724636, now seen corresponding path program 11 times [2024-06-20 16:28:44,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:44,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635018897] [2024-06-20 16:28:44,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:44,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:44,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:45,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:45,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:45,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635018897] [2024-06-20 16:28:45,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635018897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:45,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:45,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:28:45,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936008830] [2024-06-20 16:28:45,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:45,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:28:45,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:45,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:28:45,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:28:45,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:28:45,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 475 transitions, 6073 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:45,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:45,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:28:45,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:46,791 INFO L124 PetriNetUnfolderBase]: 3309/5202 cut-off events. [2024-06-20 16:28:46,791 INFO L125 PetriNetUnfolderBase]: For 1409794/1409794 co-relation queries the response was YES. [2024-06-20 16:28:46,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60455 conditions, 5202 events. 3309/5202 cut-off events. For 1409794/1409794 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 29711 event pairs, 757 based on Foata normal form. 1/5202 useless extension candidates. Maximal degree in co-relation 60284. Up to 4836 conditions per place. [2024-06-20 16:28:46,866 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 408 selfloop transitions, 46 changer transitions 0/488 dead transitions. [2024-06-20 16:28:46,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 488 transitions, 7137 flow [2024-06-20 16:28:46,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:28:46,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:28:46,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-20 16:28:46,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-20 16:28:46,867 INFO L175 Difference]: Start difference. First operand has 368 places, 475 transitions, 6073 flow. Second operand 8 states and 129 transitions. [2024-06-20 16:28:46,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 488 transitions, 7137 flow [2024-06-20 16:28:52,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 488 transitions, 6869 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 16:28:52,162 INFO L231 Difference]: Finished difference. Result has 368 places, 478 transitions, 6037 flow [2024-06-20 16:28:52,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5805, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6037, PETRI_PLACES=368, PETRI_TRANSITIONS=478} [2024-06-20 16:28:52,163 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-20 16:28:52,163 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 478 transitions, 6037 flow [2024-06-20 16:28:52,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:52,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:52,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:52,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 16:28:52,164 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)] === [2024-06-20 16:28:52,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:52,164 INFO L85 PathProgramCache]: Analyzing trace with hash 747844792, now seen corresponding path program 12 times [2024-06-20 16:28:52,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:52,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323364306] [2024-06-20 16:28:52,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:52,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:52,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:53,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:53,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323364306] [2024-06-20 16:28:53,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323364306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:53,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:53,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:28:53,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929522631] [2024-06-20 16:28:53,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:53,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:28:53,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:53,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:28:53,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:28:53,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:28:53,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 478 transitions, 6037 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:53,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:53,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:28:53,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:54,341 INFO L124 PetriNetUnfolderBase]: 3305/5207 cut-off events. [2024-06-20 16:28:54,342 INFO L125 PetriNetUnfolderBase]: For 1433587/1433597 co-relation queries the response was YES. [2024-06-20 16:28:54,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60382 conditions, 5207 events. 3305/5207 cut-off events. For 1433587/1433597 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 29947 event pairs, 786 based on Foata normal form. 8/5209 useless extension candidates. Maximal degree in co-relation 60210. Up to 4552 conditions per place. [2024-06-20 16:28:54,415 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 312 selfloop transitions, 147 changer transitions 0/493 dead transitions. [2024-06-20 16:28:54,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 493 transitions, 7493 flow [2024-06-20 16:28:54,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:28:54,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:28:54,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 16:28:54,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-20 16:28:54,417 INFO L175 Difference]: Start difference. First operand has 368 places, 478 transitions, 6037 flow. Second operand 8 states and 139 transitions. [2024-06-20 16:28:54,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 493 transitions, 7493 flow [2024-06-20 16:28:58,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 493 transitions, 7149 flow, removed 93 selfloop flow, removed 8 redundant places. [2024-06-20 16:28:59,001 INFO L231 Difference]: Finished difference. Result has 368 places, 478 transitions, 5993 flow [2024-06-20 16:28:59,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5693, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5993, PETRI_PLACES=368, PETRI_TRANSITIONS=478} [2024-06-20 16:28:59,001 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-20 16:28:59,002 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 478 transitions, 5993 flow [2024-06-20 16:28:59,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:59,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:59,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:59,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 16:28:59,002 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)] === [2024-06-20 16:28:59,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:59,002 INFO L85 PathProgramCache]: Analyzing trace with hash 918547036, now seen corresponding path program 12 times [2024-06-20 16:28:59,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:59,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785574143] [2024-06-20 16:28:59,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:59,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:59,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:59,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:59,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785574143] [2024-06-20 16:28:59,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785574143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:59,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:59,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:28:59,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529022461] [2024-06-20 16:28:59,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:59,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:28:59,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:59,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:28:59,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:28:59,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:28:59,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 478 transitions, 5993 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:59,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:59,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:28:59,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:01,220 INFO L124 PetriNetUnfolderBase]: 3302/5200 cut-off events. [2024-06-20 16:29:01,221 INFO L125 PetriNetUnfolderBase]: For 1432207/1432211 co-relation queries the response was YES. [2024-06-20 16:29:01,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60216 conditions, 5200 events. 3302/5200 cut-off events. For 1432207/1432211 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29852 event pairs, 786 based on Foata normal form. 5/5204 useless extension candidates. Maximal degree in co-relation 60044. Up to 4635 conditions per place. [2024-06-20 16:29:01,296 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 336 selfloop transitions, 120 changer transitions 0/490 dead transitions. [2024-06-20 16:29:01,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 490 transitions, 7182 flow [2024-06-20 16:29:01,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:01,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:01,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 16:29:01,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-20 16:29:01,297 INFO L175 Difference]: Start difference. First operand has 368 places, 478 transitions, 5993 flow. Second operand 8 states and 135 transitions. [2024-06-20 16:29:01,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 490 transitions, 7182 flow [2024-06-20 16:29:06,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 490 transitions, 6694 flow, removed 46 selfloop flow, removed 9 redundant places. [2024-06-20 16:29:06,348 INFO L231 Difference]: Finished difference. Result has 367 places, 478 transitions, 5751 flow [2024-06-20 16:29:06,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5505, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5751, PETRI_PLACES=367, PETRI_TRANSITIONS=478} [2024-06-20 16:29:06,348 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-20 16:29:06,348 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 478 transitions, 5751 flow [2024-06-20 16:29:06,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:06,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:06,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:06,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 16:29:06,349 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:06,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:06,349 INFO L85 PathProgramCache]: Analyzing trace with hash 747721660, now seen corresponding path program 4 times [2024-06-20 16:29:06,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:06,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641991235] [2024-06-20 16:29:06,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:06,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:07,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:07,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:07,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641991235] [2024-06-20 16:29:07,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641991235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:07,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:07,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:07,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551052012] [2024-06-20 16:29:07,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:07,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:07,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:07,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:07,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:07,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:29:07,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 478 transitions, 5751 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:07,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:07,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:29:07,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:08,637 INFO L124 PetriNetUnfolderBase]: 3297/5191 cut-off events. [2024-06-20 16:29:08,637 INFO L125 PetriNetUnfolderBase]: For 1445235/1445235 co-relation queries the response was YES. [2024-06-20 16:29:08,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59598 conditions, 5191 events. 3297/5191 cut-off events. For 1445235/1445235 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29701 event pairs, 755 based on Foata normal form. 2/5192 useless extension candidates. Maximal degree in co-relation 59426. Up to 4816 conditions per place. [2024-06-20 16:29:08,710 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 412 selfloop transitions, 45 changer transitions 0/491 dead transitions. [2024-06-20 16:29:08,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 491 transitions, 6781 flow [2024-06-20 16:29:08,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:08,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:08,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-20 16:29:08,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-20 16:29:08,711 INFO L175 Difference]: Start difference. First operand has 367 places, 478 transitions, 5751 flow. Second operand 8 states and 129 transitions. [2024-06-20 16:29:08,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 491 transitions, 6781 flow [2024-06-20 16:29:14,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 491 transitions, 6409 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-20 16:29:14,387 INFO L231 Difference]: Finished difference. Result has 367 places, 480 transitions, 5564 flow [2024-06-20 16:29:14,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5379, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5564, PETRI_PLACES=367, PETRI_TRANSITIONS=480} [2024-06-20 16:29:14,387 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-20 16:29:14,387 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 480 transitions, 5564 flow [2024-06-20 16:29:14,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:14,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:14,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:14,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 16:29:14,388 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:14,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:14,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1147588366, now seen corresponding path program 2 times [2024-06-20 16:29:14,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:14,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464043860] [2024-06-20 16:29:14,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:14,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:15,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:15,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:15,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464043860] [2024-06-20 16:29:15,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464043860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:15,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:15,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:29:15,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307071870] [2024-06-20 16:29:15,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:15,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:29:15,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:15,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:29:15,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:29:15,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:29:15,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 480 transitions, 5564 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:15,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:15,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:29:15,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:16,592 INFO L124 PetriNetUnfolderBase]: 3159/5010 cut-off events. [2024-06-20 16:29:16,592 INFO L125 PetriNetUnfolderBase]: For 1482226/1482297 co-relation queries the response was YES. [2024-06-20 16:29:16,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58042 conditions, 5010 events. 3159/5010 cut-off events. For 1482226/1482297 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 29075 event pairs, 750 based on Foata normal form. 20/4998 useless extension candidates. Maximal degree in co-relation 57870. Up to 4517 conditions per place. [2024-06-20 16:29:16,674 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 347 selfloop transitions, 80 changer transitions 0/502 dead transitions. [2024-06-20 16:29:16,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 502 transitions, 7198 flow [2024-06-20 16:29:16,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:29:16,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:29:16,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-20 16:29:16,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-20 16:29:16,675 INFO L175 Difference]: Start difference. First operand has 367 places, 480 transitions, 5564 flow. Second operand 9 states and 147 transitions. [2024-06-20 16:29:16,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 502 transitions, 7198 flow [2024-06-20 16:29:21,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 502 transitions, 7029 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-20 16:29:21,853 INFO L231 Difference]: Finished difference. Result has 370 places, 489 transitions, 5825 flow [2024-06-20 16:29:21,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5395, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5825, PETRI_PLACES=370, PETRI_TRANSITIONS=489} [2024-06-20 16:29:21,854 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-20 16:29:21,854 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 489 transitions, 5825 flow [2024-06-20 16:29:21,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:21,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:21,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:21,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 16:29:21,855 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:21,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:21,855 INFO L85 PathProgramCache]: Analyzing trace with hash -446530286, now seen corresponding path program 3 times [2024-06-20 16:29:21,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:21,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216377062] [2024-06-20 16:29:21,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:21,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:21,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:22,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:22,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:22,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216377062] [2024-06-20 16:29:22,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216377062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:22,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:22,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:29:22,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082190376] [2024-06-20 16:29:22,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:22,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:29:22,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:22,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:29:22,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:29:23,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:29:23,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 489 transitions, 5825 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:23,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:23,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:29:23,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:24,306 INFO L124 PetriNetUnfolderBase]: 3157/5008 cut-off events. [2024-06-20 16:29:24,306 INFO L125 PetriNetUnfolderBase]: For 1491920/1491959 co-relation queries the response was YES. [2024-06-20 16:29:24,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58250 conditions, 5008 events. 3157/5008 cut-off events. For 1491920/1491959 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 29041 event pairs, 749 based on Foata normal form. 20/4998 useless extension candidates. Maximal degree in co-relation 58077. Up to 4516 conditions per place. [2024-06-20 16:29:24,377 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 349 selfloop transitions, 77 changer transitions 0/501 dead transitions. [2024-06-20 16:29:24,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 501 transitions, 6955 flow [2024-06-20 16:29:24,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:29:24,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:29:24,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-20 16:29:24,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-20 16:29:24,378 INFO L175 Difference]: Start difference. First operand has 370 places, 489 transitions, 5825 flow. Second operand 9 states and 147 transitions. [2024-06-20 16:29:24,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 501 transitions, 6955 flow [2024-06-20 16:29:29,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 501 transitions, 6761 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-20 16:29:29,631 INFO L231 Difference]: Finished difference. Result has 375 places, 489 transitions, 5791 flow [2024-06-20 16:29:29,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5631, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5791, PETRI_PLACES=375, PETRI_TRANSITIONS=489} [2024-06-20 16:29:29,631 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-20 16:29:29,631 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 489 transitions, 5791 flow [2024-06-20 16:29:29,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:29,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:29,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:29,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 16:29:29,632 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:29,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:29,632 INFO L85 PathProgramCache]: Analyzing trace with hash -32748176, now seen corresponding path program 4 times [2024-06-20 16:29:29,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:29,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212765127] [2024-06-20 16:29:29,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:29,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:29,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:30,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:30,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212765127] [2024-06-20 16:29:30,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212765127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:30,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:30,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:29:30,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907036829] [2024-06-20 16:29:30,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:30,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:29:30,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:30,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:29:30,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:29:30,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:29:30,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 489 transitions, 5791 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:30,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:30,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:29:30,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:32,011 INFO L124 PetriNetUnfolderBase]: 3158/5015 cut-off events. [2024-06-20 16:29:32,011 INFO L125 PetriNetUnfolderBase]: For 1516993/1517036 co-relation queries the response was YES. [2024-06-20 16:29:32,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58525 conditions, 5015 events. 3158/5015 cut-off events. For 1516993/1517036 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 29266 event pairs, 785 based on Foata normal form. 19/5006 useless extension candidates. Maximal degree in co-relation 58350. Up to 4624 conditions per place. [2024-06-20 16:29:32,092 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 407 selfloop transitions, 21 changer transitions 0/503 dead transitions. [2024-06-20 16:29:32,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 503 transitions, 6767 flow [2024-06-20 16:29:32,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:29:32,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:29:32,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-20 16:29:32,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-20 16:29:32,094 INFO L175 Difference]: Start difference. First operand has 375 places, 489 transitions, 5791 flow. Second operand 9 states and 138 transitions. [2024-06-20 16:29:32,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 503 transitions, 6767 flow [2024-06-20 16:29:36,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 503 transitions, 6552 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-20 16:29:36,687 INFO L231 Difference]: Finished difference. Result has 376 places, 492 transitions, 5720 flow [2024-06-20 16:29:36,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5582, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5720, PETRI_PLACES=376, PETRI_TRANSITIONS=492} [2024-06-20 16:29:36,687 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 333 predicate places. [2024-06-20 16:29:36,688 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 492 transitions, 5720 flow [2024-06-20 16:29:36,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:36,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:36,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:36,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 16:29:36,689 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:36,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:36,689 INFO L85 PathProgramCache]: Analyzing trace with hash -46629356, now seen corresponding path program 5 times [2024-06-20 16:29:36,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:36,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382844982] [2024-06-20 16:29:36,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:36,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:36,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:37,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:37,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:37,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382844982] [2024-06-20 16:29:37,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382844982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:37,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:37,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:29:37,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131903387] [2024-06-20 16:29:37,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:37,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:29:37,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:37,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:29:37,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:29:37,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:29:37,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 492 transitions, 5720 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:37,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:37,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:29:37,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:39,009 INFO L124 PetriNetUnfolderBase]: 3156/5007 cut-off events. [2024-06-20 16:29:39,009 INFO L125 PetriNetUnfolderBase]: For 1521929/1521972 co-relation queries the response was YES. [2024-06-20 16:29:39,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58239 conditions, 5007 events. 3156/5007 cut-off events. For 1521929/1521972 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29084 event pairs, 748 based on Foata normal form. 20/4997 useless extension candidates. Maximal degree in co-relation 58063. Up to 4517 conditions per place. [2024-06-20 16:29:39,079 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 341 selfloop transitions, 87 changer transitions 0/503 dead transitions. [2024-06-20 16:29:39,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 503 transitions, 6606 flow [2024-06-20 16:29:39,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:29:39,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:29:39,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-20 16:29:39,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 16:29:39,081 INFO L175 Difference]: Start difference. First operand has 376 places, 492 transitions, 5720 flow. Second operand 9 states and 144 transitions. [2024-06-20 16:29:39,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 503 transitions, 6606 flow [2024-06-20 16:29:43,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 503 transitions, 6432 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-20 16:29:43,734 INFO L231 Difference]: Finished difference. Result has 378 places, 492 transitions, 5726 flow [2024-06-20 16:29:43,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5546, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5726, PETRI_PLACES=378, PETRI_TRANSITIONS=492} [2024-06-20 16:29:43,735 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-20 16:29:43,735 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 492 transitions, 5726 flow [2024-06-20 16:29:43,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:43,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:43,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:43,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 16:29:43,735 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:43,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:43,736 INFO L85 PathProgramCache]: Analyzing trace with hash 766497466, now seen corresponding path program 13 times [2024-06-20 16:29:43,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:43,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149759944] [2024-06-20 16:29:43,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:43,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:43,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:44,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:44,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149759944] [2024-06-20 16:29:44,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149759944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:44,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:44,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:29:44,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38484562] [2024-06-20 16:29:44,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:44,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:29:44,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:44,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:29:44,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:29:44,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:29:44,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 492 transitions, 5726 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:44,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:44,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:29:44,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:46,014 INFO L124 PetriNetUnfolderBase]: 3357/5282 cut-off events. [2024-06-20 16:29:46,015 INFO L125 PetriNetUnfolderBase]: For 1541083/1541087 co-relation queries the response was YES. [2024-06-20 16:29:46,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60678 conditions, 5282 events. 3357/5282 cut-off events. For 1541083/1541087 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 30431 event pairs, 742 based on Foata normal form. 5/5286 useless extension candidates. Maximal degree in co-relation 60501. Up to 4806 conditions per place. [2024-06-20 16:29:46,093 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 415 selfloop transitions, 90 changer transitions 0/539 dead transitions. [2024-06-20 16:29:46,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 539 transitions, 7049 flow [2024-06-20 16:29:46,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:29:46,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:29:46,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 16:29:46,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-20 16:29:46,095 INFO L175 Difference]: Start difference. First operand has 378 places, 492 transitions, 5726 flow. Second operand 9 states and 160 transitions. [2024-06-20 16:29:46,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 539 transitions, 7049 flow [2024-06-20 16:29:52,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 539 transitions, 6793 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-20 16:29:52,747 INFO L231 Difference]: Finished difference. Result has 380 places, 514 transitions, 5927 flow [2024-06-20 16:29:52,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5470, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5927, PETRI_PLACES=380, PETRI_TRANSITIONS=514} [2024-06-20 16:29:52,748 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-20 16:29:52,748 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 514 transitions, 5927 flow [2024-06-20 16:29:52,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:52,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:52,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:52,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 16:29:52,749 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:29:52,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:52,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1542360620, now seen corresponding path program 1 times [2024-06-20 16:29:52,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:52,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259321342] [2024-06-20 16:29:52,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:52,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:52,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:53,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:53,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259321342] [2024-06-20 16:29:53,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259321342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:53,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:53,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:29:53,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954793206] [2024-06-20 16:29:53,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:53,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:29:53,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:53,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:29:53,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:29:53,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 16:29:53,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 514 transitions, 5927 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:53,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:53,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 16:29:53,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:55,249 INFO L124 PetriNetUnfolderBase]: 3240/5168 cut-off events. [2024-06-20 16:29:55,249 INFO L125 PetriNetUnfolderBase]: For 1573296/1573296 co-relation queries the response was YES. [2024-06-20 16:29:55,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60101 conditions, 5168 events. 3240/5168 cut-off events. For 1573296/1573296 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 30356 event pairs, 716 based on Foata normal form. 2/5157 useless extension candidates. Maximal degree in co-relation 59922. Up to 4728 conditions per place. [2024-06-20 16:29:55,326 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 479 selfloop transitions, 18 changer transitions 0/537 dead transitions. [2024-06-20 16:29:55,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 537 transitions, 7089 flow [2024-06-20 16:29:55,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:55,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:55,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:29:55,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-20 16:29:55,328 INFO L175 Difference]: Start difference. First operand has 380 places, 514 transitions, 5927 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:29:55,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 537 transitions, 7089 flow [2024-06-20 16:30:00,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 537 transitions, 6925 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-20 16:30:00,334 INFO L231 Difference]: Finished difference. Result has 382 places, 516 transitions, 5900 flow [2024-06-20 16:30:00,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5763, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5900, PETRI_PLACES=382, PETRI_TRANSITIONS=516} [2024-06-20 16:30:00,335 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-20 16:30:00,335 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 516 transitions, 5900 flow [2024-06-20 16:30:00,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:00,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:00,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:00,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 16:30:00,336 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:00,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:00,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1912531342, now seen corresponding path program 1 times [2024-06-20 16:30:00,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:00,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253423499] [2024-06-20 16:30:00,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:00,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:00,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:01,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:01,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253423499] [2024-06-20 16:30:01,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253423499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:01,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:01,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:30:01,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541781030] [2024-06-20 16:30:01,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:01,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:30:01,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:01,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:30:01,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:30:01,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:30:01,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 516 transitions, 5900 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:01,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:01,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:30:01,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:02,808 INFO L124 PetriNetUnfolderBase]: 3309/5236 cut-off events. [2024-06-20 16:30:02,808 INFO L125 PetriNetUnfolderBase]: For 1574224/1574224 co-relation queries the response was YES. [2024-06-20 16:30:02,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60339 conditions, 5236 events. 3309/5236 cut-off events. For 1574224/1574224 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 30405 event pairs, 775 based on Foata normal form. 1/5224 useless extension candidates. Maximal degree in co-relation 60160. Up to 4936 conditions per place. [2024-06-20 16:30:02,892 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 498 selfloop transitions, 26 changer transitions 0/534 dead transitions. [2024-06-20 16:30:02,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 534 transitions, 7026 flow [2024-06-20 16:30:02,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:30:02,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:30:02,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 16:30:02,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-20 16:30:02,894 INFO L175 Difference]: Start difference. First operand has 382 places, 516 transitions, 5900 flow. Second operand 8 states and 134 transitions. [2024-06-20 16:30:02,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 534 transitions, 7026 flow [2024-06-20 16:30:09,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 534 transitions, 6799 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-20 16:30:09,510 INFO L231 Difference]: Finished difference. Result has 383 places, 516 transitions, 5735 flow [2024-06-20 16:30:09,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5673, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5735, PETRI_PLACES=383, PETRI_TRANSITIONS=516} [2024-06-20 16:30:09,510 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-20 16:30:09,510 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 516 transitions, 5735 flow [2024-06-20 16:30:09,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:09,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:09,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:09,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 16:30:09,511 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:09,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:09,511 INFO L85 PathProgramCache]: Analyzing trace with hash -538927938, now seen corresponding path program 2 times [2024-06-20 16:30:09,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:09,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893902358] [2024-06-20 16:30:09,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:09,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:10,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:10,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:10,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893902358] [2024-06-20 16:30:10,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893902358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:10,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:10,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:30:10,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613902085] [2024-06-20 16:30:10,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:10,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:30:10,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:10,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:30:10,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:30:10,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 16:30:10,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 516 transitions, 5735 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:10,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:10,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 16:30:10,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:12,040 INFO L124 PetriNetUnfolderBase]: 3251/5177 cut-off events. [2024-06-20 16:30:12,041 INFO L125 PetriNetUnfolderBase]: For 1628112/1628114 co-relation queries the response was YES. [2024-06-20 16:30:12,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59999 conditions, 5177 events. 3251/5177 cut-off events. For 1628112/1628114 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30449 event pairs, 760 based on Foata normal form. 2/5160 useless extension candidates. Maximal degree in co-relation 59820. Up to 4754 conditions per place. [2024-06-20 16:30:12,122 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 474 selfloop transitions, 22 changer transitions 0/536 dead transitions. [2024-06-20 16:30:12,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 536 transitions, 6891 flow [2024-06-20 16:30:12,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:30:12,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:30:12,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 16:30:12,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 16:30:12,124 INFO L175 Difference]: Start difference. First operand has 383 places, 516 transitions, 5735 flow. Second operand 8 states and 140 transitions. [2024-06-20 16:30:12,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 536 transitions, 6891 flow [2024-06-20 16:30:18,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 536 transitions, 6805 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-20 16:30:18,128 INFO L231 Difference]: Finished difference. Result has 383 places, 518 transitions, 5797 flow [2024-06-20 16:30:18,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5649, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5797, PETRI_PLACES=383, PETRI_TRANSITIONS=518} [2024-06-20 16:30:18,128 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-20 16:30:18,128 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 518 transitions, 5797 flow [2024-06-20 16:30:18,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:18,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:18,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:18,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 16:30:18,129 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:18,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:18,129 INFO L85 PathProgramCache]: Analyzing trace with hash 927907599, now seen corresponding path program 1 times [2024-06-20 16:30:18,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:18,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941630126] [2024-06-20 16:30:18,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:18,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:19,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:19,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:19,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941630126] [2024-06-20 16:30:19,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941630126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:19,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:19,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:30:19,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488258543] [2024-06-20 16:30:19,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:19,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:30:19,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:19,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:30:19,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:30:19,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:30:19,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 518 transitions, 5797 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:19,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:19,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:30:19,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:20,836 INFO L124 PetriNetUnfolderBase]: 3327/5266 cut-off events. [2024-06-20 16:30:20,836 INFO L125 PetriNetUnfolderBase]: For 1648323/1648323 co-relation queries the response was YES. [2024-06-20 16:30:20,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60470 conditions, 5266 events. 3327/5266 cut-off events. For 1648323/1648323 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 30683 event pairs, 774 based on Foata normal form. 4/5257 useless extension candidates. Maximal degree in co-relation 60290. Up to 4960 conditions per place. [2024-06-20 16:30:20,935 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 507 selfloop transitions, 24 changer transitions 0/541 dead transitions. [2024-06-20 16:30:20,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 541 transitions, 7031 flow [2024-06-20 16:30:20,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:30:20,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:30:20,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-20 16:30:20,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-20 16:30:20,937 INFO L175 Difference]: Start difference. First operand has 383 places, 518 transitions, 5797 flow. Second operand 9 states and 148 transitions. [2024-06-20 16:30:20,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 541 transitions, 7031 flow [2024-06-20 16:30:28,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 541 transitions, 6901 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-20 16:30:28,137 INFO L231 Difference]: Finished difference. Result has 386 places, 521 transitions, 5809 flow [2024-06-20 16:30:28,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5667, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5809, PETRI_PLACES=386, PETRI_TRANSITIONS=521} [2024-06-20 16:30:28,137 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 343 predicate places. [2024-06-20 16:30:28,137 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 521 transitions, 5809 flow [2024-06-20 16:30:28,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:28,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:28,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:28,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 16:30:28,138 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:28,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:28,138 INFO L85 PathProgramCache]: Analyzing trace with hash 627912690, now seen corresponding path program 3 times [2024-06-20 16:30:28,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:28,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913016258] [2024-06-20 16:30:28,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:28,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:28,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:29,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:29,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913016258] [2024-06-20 16:30:29,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913016258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:29,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:29,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:30:29,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83338118] [2024-06-20 16:30:29,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:29,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:30:29,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:29,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:30:29,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:30:29,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 16:30:29,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 521 transitions, 5809 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:29,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:29,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 16:30:29,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:30,583 INFO L124 PetriNetUnfolderBase]: 3265/5199 cut-off events. [2024-06-20 16:30:30,583 INFO L125 PetriNetUnfolderBase]: For 1677926/1677930 co-relation queries the response was YES. [2024-06-20 16:30:30,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61048 conditions, 5199 events. 3265/5199 cut-off events. For 1677926/1677930 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 30579 event pairs, 755 based on Foata normal form. 2/5178 useless extension candidates. Maximal degree in co-relation 60867. Up to 4769 conditions per place. [2024-06-20 16:30:30,671 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 471 selfloop transitions, 28 changer transitions 0/539 dead transitions. [2024-06-20 16:30:30,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 539 transitions, 6973 flow [2024-06-20 16:30:30,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:30:30,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:30:30,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 16:30:30,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-20 16:30:30,673 INFO L175 Difference]: Start difference. First operand has 386 places, 521 transitions, 5809 flow. Second operand 9 states and 151 transitions. [2024-06-20 16:30:30,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 539 transitions, 6973 flow [2024-06-20 16:30:36,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 539 transitions, 6853 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-20 16:30:36,180 INFO L231 Difference]: Finished difference. Result has 388 places, 523 transitions, 5854 flow [2024-06-20 16:30:36,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5689, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5854, PETRI_PLACES=388, PETRI_TRANSITIONS=523} [2024-06-20 16:30:36,181 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-20 16:30:36,181 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 523 transitions, 5854 flow [2024-06-20 16:30:36,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:36,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:36,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:36,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 16:30:36,181 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:36,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:36,182 INFO L85 PathProgramCache]: Analyzing trace with hash -2009388419, now seen corresponding path program 2 times [2024-06-20 16:30:36,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:36,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138034661] [2024-06-20 16:30:36,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:36,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:36,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:37,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:37,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138034661] [2024-06-20 16:30:37,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138034661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:37,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:37,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:30:37,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923555260] [2024-06-20 16:30:37,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:37,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:30:37,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:37,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:30:37,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:30:37,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:30:37,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 523 transitions, 5854 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:37,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:37,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:30:37,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:38,659 INFO L124 PetriNetUnfolderBase]: 3418/5397 cut-off events. [2024-06-20 16:30:38,659 INFO L125 PetriNetUnfolderBase]: For 1796592/1796592 co-relation queries the response was YES. [2024-06-20 16:30:38,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64106 conditions, 5397 events. 3418/5397 cut-off events. For 1796592/1796592 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 31480 event pairs, 801 based on Foata normal form. 4/5388 useless extension candidates. Maximal degree in co-relation 63924. Up to 4981 conditions per place. [2024-06-20 16:30:38,748 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 497 selfloop transitions, 48 changer transitions 0/555 dead transitions. [2024-06-20 16:30:38,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 555 transitions, 7890 flow [2024-06-20 16:30:38,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:30:38,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:30:38,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 16:30:38,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-20 16:30:38,750 INFO L175 Difference]: Start difference. First operand has 388 places, 523 transitions, 5854 flow. Second operand 9 states and 156 transitions. [2024-06-20 16:30:38,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 555 transitions, 7890 flow [2024-06-20 16:30:45,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 555 transitions, 7719 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-20 16:30:45,999 INFO L231 Difference]: Finished difference. Result has 392 places, 534 transitions, 6149 flow [2024-06-20 16:30:46,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5683, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6149, PETRI_PLACES=392, PETRI_TRANSITIONS=534} [2024-06-20 16:30:46,000 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 349 predicate places. [2024-06-20 16:30:46,000 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 534 transitions, 6149 flow [2024-06-20 16:30:46,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:46,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:46,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:46,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 16:30:46,001 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:46,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:46,001 INFO L85 PathProgramCache]: Analyzing trace with hash 628090630, now seen corresponding path program 1 times [2024-06-20 16:30:46,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:46,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064725186] [2024-06-20 16:30:46,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:46,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:46,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:46,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:46,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064725186] [2024-06-20 16:30:46,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064725186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:46,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:46,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:30:46,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574693122] [2024-06-20 16:30:46,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:46,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:30:46,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:46,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:30:46,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:30:46,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:30:46,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 534 transitions, 6149 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:46,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:46,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:30:46,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:48,378 INFO L124 PetriNetUnfolderBase]: 3424/5407 cut-off events. [2024-06-20 16:30:48,378 INFO L125 PetriNetUnfolderBase]: For 1818628/1818637 co-relation queries the response was YES. [2024-06-20 16:30:48,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64982 conditions, 5407 events. 3424/5407 cut-off events. For 1818628/1818637 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 31523 event pairs, 794 based on Foata normal form. 13/5406 useless extension candidates. Maximal degree in co-relation 64798. Up to 4984 conditions per place. [2024-06-20 16:30:48,473 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 496 selfloop transitions, 52 changer transitions 0/558 dead transitions. [2024-06-20 16:30:48,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 558 transitions, 7985 flow [2024-06-20 16:30:48,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:30:48,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:30:48,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 16:30:48,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-20 16:30:48,475 INFO L175 Difference]: Start difference. First operand has 392 places, 534 transitions, 6149 flow. Second operand 9 states and 155 transitions. [2024-06-20 16:30:48,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 558 transitions, 7985 flow [2024-06-20 16:30:54,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 558 transitions, 7848 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-20 16:30:54,921 INFO L231 Difference]: Finished difference. Result has 397 places, 537 transitions, 6222 flow [2024-06-20 16:30:54,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6024, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6222, PETRI_PLACES=397, PETRI_TRANSITIONS=537} [2024-06-20 16:30:54,921 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-20 16:30:54,921 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 537 transitions, 6222 flow [2024-06-20 16:30:54,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:54,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:30:54,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:30:54,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 16:30:54,922 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:30:54,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:30:54,922 INFO L85 PathProgramCache]: Analyzing trace with hash 628097140, now seen corresponding path program 2 times [2024-06-20 16:30:54,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:30:54,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459391540] [2024-06-20 16:30:54,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:30:54,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:30:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:30:55,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:30:55,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:30:55,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459391540] [2024-06-20 16:30:55,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459391540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:30:55,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:30:55,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:30:55,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915618138] [2024-06-20 16:30:55,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:30:55,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:30:55,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:30:55,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:30:55,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:30:55,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:30:55,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 537 transitions, 6222 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:30:55,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:30:55,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:30:55,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:30:57,298 INFO L124 PetriNetUnfolderBase]: 3414/5398 cut-off events. [2024-06-20 16:30:57,298 INFO L125 PetriNetUnfolderBase]: For 1807235/1807244 co-relation queries the response was YES. [2024-06-20 16:30:57,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64228 conditions, 5398 events. 3414/5398 cut-off events. For 1807235/1807244 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 31517 event pairs, 777 based on Foata normal form. 14/5399 useless extension candidates. Maximal degree in co-relation 64042. Up to 4981 conditions per place. [2024-06-20 16:30:57,390 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 493 selfloop transitions, 54 changer transitions 0/557 dead transitions. [2024-06-20 16:30:57,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 557 transitions, 7690 flow [2024-06-20 16:30:57,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:30:57,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:30:57,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 16:30:57,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 16:30:57,392 INFO L175 Difference]: Start difference. First operand has 397 places, 537 transitions, 6222 flow. Second operand 9 states and 153 transitions. [2024-06-20 16:30:57,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 557 transitions, 7690 flow [2024-06-20 16:31:05,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 557 transitions, 7456 flow, removed 76 selfloop flow, removed 6 redundant places. [2024-06-20 16:31:05,528 INFO L231 Difference]: Finished difference. Result has 400 places, 537 transitions, 6104 flow [2024-06-20 16:31:05,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5988, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6104, PETRI_PLACES=400, PETRI_TRANSITIONS=537} [2024-06-20 16:31:05,528 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-20 16:31:05,529 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 537 transitions, 6104 flow [2024-06-20 16:31:05,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:05,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:05,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:05,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 16:31:05,529 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:31:05,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:05,530 INFO L85 PathProgramCache]: Analyzing trace with hash -41319862, now seen corresponding path program 3 times [2024-06-20 16:31:05,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:05,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282007351] [2024-06-20 16:31:05,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:05,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:05,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:06,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:06,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:06,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282007351] [2024-06-20 16:31:06,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282007351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:06,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:06,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:31:06,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628907557] [2024-06-20 16:31:06,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:06,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:31:06,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:06,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:31:06,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:31:06,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:31:06,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 537 transitions, 6104 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:06,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:06,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:31:06,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:08,132 INFO L124 PetriNetUnfolderBase]: 3490/5507 cut-off events. [2024-06-20 16:31:08,132 INFO L125 PetriNetUnfolderBase]: For 1893408/1893410 co-relation queries the response was YES. [2024-06-20 16:31:08,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66829 conditions, 5507 events. 3490/5507 cut-off events. For 1893408/1893410 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 32222 event pairs, 785 based on Foata normal form. 4/5494 useless extension candidates. Maximal degree in co-relation 66642. Up to 4920 conditions per place. [2024-06-20 16:31:08,231 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 472 selfloop transitions, 90 changer transitions 0/572 dead transitions. [2024-06-20 16:31:08,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 572 transitions, 8622 flow [2024-06-20 16:31:08,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:31:08,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:31:08,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 16:31:08,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-20 16:31:08,232 INFO L175 Difference]: Start difference. First operand has 400 places, 537 transitions, 6104 flow. Second operand 9 states and 160 transitions. [2024-06-20 16:31:08,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 572 transitions, 8622 flow [2024-06-20 16:31:16,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 572 transitions, 8514 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 16:31:16,022 INFO L231 Difference]: Finished difference. Result has 404 places, 551 transitions, 6647 flow [2024-06-20 16:31:16,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5996, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6647, PETRI_PLACES=404, PETRI_TRANSITIONS=551} [2024-06-20 16:31:16,027 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-20 16:31:16,027 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 551 transitions, 6647 flow [2024-06-20 16:31:16,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:16,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:16,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:16,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 16:31:16,028 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:31:16,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:16,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1153307990, now seen corresponding path program 4 times [2024-06-20 16:31:16,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:16,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286152683] [2024-06-20 16:31:16,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:16,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:16,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:17,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:17,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:17,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286152683] [2024-06-20 16:31:17,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286152683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:17,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:17,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:31:17,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811290393] [2024-06-20 16:31:17,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:17,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:31:17,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:17,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:31:17,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:31:17,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:31:17,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 551 transitions, 6647 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:17,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:17,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:31:17,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:18,715 INFO L124 PetriNetUnfolderBase]: 3540/5580 cut-off events. [2024-06-20 16:31:18,715 INFO L125 PetriNetUnfolderBase]: For 1968787/1968789 co-relation queries the response was YES. [2024-06-20 16:31:18,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69028 conditions, 5580 events. 3540/5580 cut-off events. For 1968787/1968789 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 32605 event pairs, 789 based on Foata normal form. 4/5571 useless extension candidates. Maximal degree in co-relation 68838. Up to 4968 conditions per place. [2024-06-20 16:31:18,814 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 476 selfloop transitions, 94 changer transitions 0/580 dead transitions. [2024-06-20 16:31:18,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 580 transitions, 9035 flow [2024-06-20 16:31:18,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:31:18,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:31:18,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 16:31:18,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-20 16:31:18,815 INFO L175 Difference]: Start difference. First operand has 404 places, 551 transitions, 6647 flow. Second operand 9 states and 161 transitions. [2024-06-20 16:31:18,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 580 transitions, 9035 flow [2024-06-20 16:31:26,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 580 transitions, 8784 flow, removed 108 selfloop flow, removed 3 redundant places. [2024-06-20 16:31:26,936 INFO L231 Difference]: Finished difference. Result has 411 places, 559 transitions, 6875 flow [2024-06-20 16:31:26,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6450, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6875, PETRI_PLACES=411, PETRI_TRANSITIONS=559} [2024-06-20 16:31:26,937 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 368 predicate places. [2024-06-20 16:31:26,937 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 559 transitions, 6875 flow [2024-06-20 16:31:26,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:26,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:26,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:26,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 16:31:26,937 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:31:26,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:26,938 INFO L85 PathProgramCache]: Analyzing trace with hash -33039142, now seen corresponding path program 5 times [2024-06-20 16:31:26,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:26,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731185445] [2024-06-20 16:31:26,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:26,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:27,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:27,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731185445] [2024-06-20 16:31:27,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731185445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:27,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:27,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:31:27,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662381545] [2024-06-20 16:31:27,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:27,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:31:27,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:27,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:31:27,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:31:28,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:31:28,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 559 transitions, 6875 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:28,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:28,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:31:28,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:29,409 INFO L124 PetriNetUnfolderBase]: 3511/5539 cut-off events. [2024-06-20 16:31:29,410 INFO L125 PetriNetUnfolderBase]: For 1917761/1917763 co-relation queries the response was YES. [2024-06-20 16:31:29,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67547 conditions, 5539 events. 3511/5539 cut-off events. For 1917761/1917763 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 32423 event pairs, 782 based on Foata normal form. 4/5528 useless extension candidates. Maximal degree in co-relation 67354. Up to 4951 conditions per place. [2024-06-20 16:31:29,503 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 467 selfloop transitions, 102 changer transitions 0/579 dead transitions. [2024-06-20 16:31:29,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 579 transitions, 8723 flow [2024-06-20 16:31:29,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:31:29,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:31:29,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-20 16:31:29,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-20 16:31:29,505 INFO L175 Difference]: Start difference. First operand has 411 places, 559 transitions, 6875 flow. Second operand 9 states and 158 transitions. [2024-06-20 16:31:29,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 579 transitions, 8723 flow [2024-06-20 16:31:37,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 579 transitions, 8469 flow, removed 73 selfloop flow, removed 4 redundant places. [2024-06-20 16:31:37,661 INFO L231 Difference]: Finished difference. Result has 416 places, 559 transitions, 6833 flow [2024-06-20 16:31:37,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6621, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6833, PETRI_PLACES=416, PETRI_TRANSITIONS=559} [2024-06-20 16:31:37,662 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-20 16:31:37,662 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 559 transitions, 6833 flow [2024-06-20 16:31:37,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:37,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:37,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:37,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 16:31:37,663 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:31:37,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:37,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1045915216, now seen corresponding path program 6 times [2024-06-20 16:31:37,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:37,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386537892] [2024-06-20 16:31:37,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:37,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:37,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:38,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:38,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:38,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386537892] [2024-06-20 16:31:38,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386537892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:38,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:38,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:31:38,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836823373] [2024-06-20 16:31:38,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:38,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:31:38,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:38,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:31:38,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:31:38,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:31:38,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 559 transitions, 6833 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:38,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:38,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:31:38,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:40,320 INFO L124 PetriNetUnfolderBase]: 3550/5596 cut-off events. [2024-06-20 16:31:40,320 INFO L125 PetriNetUnfolderBase]: For 1962095/1962097 co-relation queries the response was YES. [2024-06-20 16:31:40,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67920 conditions, 5596 events. 3550/5596 cut-off events. For 1962095/1962097 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 32768 event pairs, 796 based on Foata normal form. 4/5587 useless extension candidates. Maximal degree in co-relation 67726. Up to 4983 conditions per place. [2024-06-20 16:31:40,412 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 481 selfloop transitions, 94 changer transitions 0/585 dead transitions. [2024-06-20 16:31:40,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 585 transitions, 9110 flow [2024-06-20 16:31:40,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:31:40,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:31:40,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 16:31:40,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:31:40,413 INFO L175 Difference]: Start difference. First operand has 416 places, 559 transitions, 6833 flow. Second operand 9 states and 162 transitions. [2024-06-20 16:31:40,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 585 transitions, 9110 flow [2024-06-20 16:31:48,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 585 transitions, 8894 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-20 16:31:48,159 INFO L231 Difference]: Finished difference. Result has 418 places, 564 transitions, 6994 flow [2024-06-20 16:31:48,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6624, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6994, PETRI_PLACES=418, PETRI_TRANSITIONS=564} [2024-06-20 16:31:48,160 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-20 16:31:48,160 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 564 transitions, 6994 flow [2024-06-20 16:31:48,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:48,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:48,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:48,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 16:31:48,160 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:31:48,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:48,161 INFO L85 PathProgramCache]: Analyzing trace with hash -269398952, now seen corresponding path program 4 times [2024-06-20 16:31:48,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:48,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728831262] [2024-06-20 16:31:48,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:48,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:48,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:49,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:49,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:49,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728831262] [2024-06-20 16:31:49,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728831262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:49,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:49,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:31:49,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883425370] [2024-06-20 16:31:49,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:49,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:31:49,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:49,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:31:49,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:31:49,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 16:31:49,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 564 transitions, 6994 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:49,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:49,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 16:31:49,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:50,789 INFO L124 PetriNetUnfolderBase]: 3459/5478 cut-off events. [2024-06-20 16:31:50,789 INFO L125 PetriNetUnfolderBase]: For 1957398/1957410 co-relation queries the response was YES. [2024-06-20 16:31:50,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67320 conditions, 5478 events. 3459/5478 cut-off events. For 1957398/1957410 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 32288 event pairs, 775 based on Foata normal form. 2/5445 useless extension candidates. Maximal degree in co-relation 67125. Up to 5030 conditions per place. [2024-06-20 16:31:50,883 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 505 selfloop transitions, 34 changer transitions 0/579 dead transitions. [2024-06-20 16:31:50,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 579 transitions, 8230 flow [2024-06-20 16:31:50,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:31:50,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:31:50,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 16:31:50,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-20 16:31:50,884 INFO L175 Difference]: Start difference. First operand has 418 places, 564 transitions, 6994 flow. Second operand 8 states and 139 transitions. [2024-06-20 16:31:50,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 579 transitions, 8230 flow [2024-06-20 16:31:58,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 579 transitions, 7762 flow, removed 56 selfloop flow, removed 10 redundant places. [2024-06-20 16:31:58,245 INFO L231 Difference]: Finished difference. Result has 416 places, 566 transitions, 6709 flow [2024-06-20 16:31:58,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6526, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6709, PETRI_PLACES=416, PETRI_TRANSITIONS=566} [2024-06-20 16:31:58,245 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-20 16:31:58,246 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 566 transitions, 6709 flow [2024-06-20 16:31:58,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:58,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:58,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:58,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 16:31:58,246 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:31:58,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:58,246 INFO L85 PathProgramCache]: Analyzing trace with hash -269221012, now seen corresponding path program 7 times [2024-06-20 16:31:58,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:58,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164149698] [2024-06-20 16:31:58,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:58,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:58,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:59,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:59,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:59,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164149698] [2024-06-20 16:31:59,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164149698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:59,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:59,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:31:59,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814549432] [2024-06-20 16:31:59,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:59,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:31:59,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:59,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:31:59,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:31:59,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:31:59,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 566 transitions, 6709 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:59,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:59,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:31:59,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:00,882 INFO L124 PetriNetUnfolderBase]: 3544/5592 cut-off events. [2024-06-20 16:32:00,882 INFO L125 PetriNetUnfolderBase]: For 1988783/1988785 co-relation queries the response was YES. [2024-06-20 16:32:00,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67363 conditions, 5592 events. 3544/5592 cut-off events. For 1988783/1988785 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 32778 event pairs, 795 based on Foata normal form. 4/5583 useless extension candidates. Maximal degree in co-relation 67168. Up to 4974 conditions per place. [2024-06-20 16:32:00,978 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 484 selfloop transitions, 96 changer transitions 0/590 dead transitions. [2024-06-20 16:32:00,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 590 transitions, 8935 flow [2024-06-20 16:32:00,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:32:00,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:32:00,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 16:32:00,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-20 16:32:00,979 INFO L175 Difference]: Start difference. First operand has 416 places, 566 transitions, 6709 flow. Second operand 9 states and 163 transitions. [2024-06-20 16:32:00,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 590 transitions, 8935 flow [2024-06-20 16:32:08,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 590 transitions, 8768 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-20 16:32:08,791 INFO L231 Difference]: Finished difference. Result has 419 places, 569 transitions, 6832 flow [2024-06-20 16:32:08,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6542, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6832, PETRI_PLACES=419, PETRI_TRANSITIONS=569} [2024-06-20 16:32:08,791 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 376 predicate places. [2024-06-20 16:32:08,791 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 569 transitions, 6832 flow [2024-06-20 16:32:08,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:08,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:08,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:08,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-20 16:32:08,792 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:32:08,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:08,792 INFO L85 PathProgramCache]: Analyzing trace with hash -269393992, now seen corresponding path program 8 times [2024-06-20 16:32:08,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:08,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420634357] [2024-06-20 16:32:08,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:08,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:08,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:09,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:09,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:09,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420634357] [2024-06-20 16:32:09,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420634357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:09,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:09,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:32:09,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531167055] [2024-06-20 16:32:09,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:09,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:32:09,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:09,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:32:09,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:32:09,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:32:09,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 569 transitions, 6832 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:09,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:09,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:32:09,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:11,207 INFO L124 PetriNetUnfolderBase]: 3543/5591 cut-off events. [2024-06-20 16:32:11,207 INFO L125 PetriNetUnfolderBase]: For 1971526/1971528 co-relation queries the response was YES. [2024-06-20 16:32:11,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67068 conditions, 5591 events. 3543/5591 cut-off events. For 1971526/1971528 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 32791 event pairs, 787 based on Foata normal form. 4/5582 useless extension candidates. Maximal degree in co-relation 66872. Up to 4976 conditions per place. [2024-06-20 16:32:11,304 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 474 selfloop transitions, 107 changer transitions 0/591 dead transitions. [2024-06-20 16:32:11,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 591 transitions, 8766 flow [2024-06-20 16:32:11,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:32:11,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:32:11,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 16:32:11,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-20 16:32:11,306 INFO L175 Difference]: Start difference. First operand has 419 places, 569 transitions, 6832 flow. Second operand 9 states and 160 transitions. [2024-06-20 16:32:11,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 591 transitions, 8766 flow [2024-06-20 16:32:19,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 591 transitions, 8512 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-20 16:32:19,101 INFO L231 Difference]: Finished difference. Result has 422 places, 572 transitions, 6896 flow [2024-06-20 16:32:19,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6580, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6896, PETRI_PLACES=422, PETRI_TRANSITIONS=572} [2024-06-20 16:32:19,101 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-20 16:32:19,101 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 572 transitions, 6896 flow [2024-06-20 16:32:19,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:19,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:19,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:19,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-20 16:32:19,102 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:32:19,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:19,102 INFO L85 PathProgramCache]: Analyzing trace with hash -32731312, now seen corresponding path program 1 times [2024-06-20 16:32:19,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:19,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685986687] [2024-06-20 16:32:19,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:19,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:20,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:20,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:20,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685986687] [2024-06-20 16:32:20,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685986687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:20,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:20,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:32:20,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482600395] [2024-06-20 16:32:20,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:20,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:32:20,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:20,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:32:20,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:32:20,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:32:20,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 572 transitions, 6896 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:20,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:20,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:32:20,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:21,950 INFO L124 PetriNetUnfolderBase]: 3509/5517 cut-off events. [2024-06-20 16:32:21,950 INFO L125 PetriNetUnfolderBase]: For 1956276/1956305 co-relation queries the response was YES. [2024-06-20 16:32:22,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66411 conditions, 5517 events. 3509/5517 cut-off events. For 1956276/1956305 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 32103 event pairs, 819 based on Foata normal form. 19/5506 useless extension candidates. Maximal degree in co-relation 66214. Up to 5119 conditions per place. [2024-06-20 16:32:22,047 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 488 selfloop transitions, 24 changer transitions 0/587 dead transitions. [2024-06-20 16:32:22,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 587 transitions, 8048 flow [2024-06-20 16:32:22,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:32:22,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:32:22,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 161 transitions. [2024-06-20 16:32:22,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3484848484848485 [2024-06-20 16:32:22,049 INFO L175 Difference]: Start difference. First operand has 422 places, 572 transitions, 6896 flow. Second operand 11 states and 161 transitions. [2024-06-20 16:32:22,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 587 transitions, 8048 flow [2024-06-20 16:32:29,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 587 transitions, 7793 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-20 16:32:29,080 INFO L231 Difference]: Finished difference. Result has 427 places, 574 transitions, 6790 flow [2024-06-20 16:32:29,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6641, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6790, PETRI_PLACES=427, PETRI_TRANSITIONS=574} [2024-06-20 16:32:29,092 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-20 16:32:29,092 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 574 transitions, 6790 flow [2024-06-20 16:32:29,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:29,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:29,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:29,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-20 16:32:29,101 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:32:29,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:29,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1482176834, now seen corresponding path program 1 times [2024-06-20 16:32:29,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:29,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120686698] [2024-06-20 16:32:29,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:29,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:30,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:30,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:30,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120686698] [2024-06-20 16:32:30,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120686698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:30,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:30,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:32:30,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280389938] [2024-06-20 16:32:30,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:30,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:32:30,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:30,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:32:30,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:32:30,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:32:30,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 574 transitions, 6790 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:30,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:30,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:32:30,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:31,691 INFO L124 PetriNetUnfolderBase]: 3676/5738 cut-off events. [2024-06-20 16:32:31,691 INFO L125 PetriNetUnfolderBase]: For 1992894/1992904 co-relation queries the response was YES. [2024-06-20 16:32:31,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68208 conditions, 5738 events. 3676/5738 cut-off events. For 1992894/1992904 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 33099 event pairs, 697 based on Foata normal form. 6/5731 useless extension candidates. Maximal degree in co-relation 68010. Up to 5306 conditions per place. [2024-06-20 16:32:31,794 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 516 selfloop transitions, 59 changer transitions 0/609 dead transitions. [2024-06-20 16:32:31,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 609 transitions, 8209 flow [2024-06-20 16:32:31,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:32:31,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:32:31,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-20 16:32:31,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-20 16:32:31,795 INFO L175 Difference]: Start difference. First operand has 427 places, 574 transitions, 6790 flow. Second operand 9 states and 158 transitions. [2024-06-20 16:32:31,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 609 transitions, 8209 flow [2024-06-20 16:32:36,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 609 transitions, 8076 flow, removed 44 selfloop flow, removed 9 redundant places. [2024-06-20 16:32:36,521 INFO L231 Difference]: Finished difference. Result has 428 places, 580 transitions, 6948 flow [2024-06-20 16:32:36,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6657, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6948, PETRI_PLACES=428, PETRI_TRANSITIONS=580} [2024-06-20 16:32:36,522 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-20 16:32:36,522 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 580 transitions, 6948 flow [2024-06-20 16:32:36,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:36,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:36,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:36,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-20 16:32:36,522 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:32:36,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:36,523 INFO L85 PathProgramCache]: Analyzing trace with hash 108345776, now seen corresponding path program 1 times [2024-06-20 16:32:36,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:36,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058075257] [2024-06-20 16:32:36,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:36,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:36,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:37,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:37,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058075257] [2024-06-20 16:32:37,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058075257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:37,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:37,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:32:37,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765398330] [2024-06-20 16:32:37,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:37,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:32:37,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:37,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:32:37,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:32:37,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:32:37,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 580 transitions, 6948 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:37,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:37,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:32:37,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:39,155 INFO L124 PetriNetUnfolderBase]: 3768/5838 cut-off events. [2024-06-20 16:32:39,156 INFO L125 PetriNetUnfolderBase]: For 2010395/2010399 co-relation queries the response was YES. [2024-06-20 16:32:39,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69713 conditions, 5838 events. 3768/5838 cut-off events. For 2010395/2010399 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 33297 event pairs, 773 based on Foata normal form. 5/5842 useless extension candidates. Maximal degree in co-relation 69513. Up to 5566 conditions per place. [2024-06-20 16:32:39,252 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 548 selfloop transitions, 56 changer transitions 0/608 dead transitions. [2024-06-20 16:32:39,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 608 transitions, 8371 flow [2024-06-20 16:32:39,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:32:39,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:32:39,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-20 16:32:39,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-20 16:32:39,254 INFO L175 Difference]: Start difference. First operand has 428 places, 580 transitions, 6948 flow. Second operand 9 states and 145 transitions. [2024-06-20 16:32:39,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 608 transitions, 8371 flow [2024-06-20 16:32:45,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 608 transitions, 8163 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-20 16:32:45,347 INFO L231 Difference]: Finished difference. Result has 432 places, 583 transitions, 6984 flow [2024-06-20 16:32:45,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6740, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6984, PETRI_PLACES=432, PETRI_TRANSITIONS=583} [2024-06-20 16:32:45,352 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-20 16:32:45,352 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 583 transitions, 6984 flow [2024-06-20 16:32:45,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:45,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:45,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:45,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-20 16:32:45,353 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:32:45,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:45,353 INFO L85 PathProgramCache]: Analyzing trace with hash -751123586, now seen corresponding path program 2 times [2024-06-20 16:32:45,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:45,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915085605] [2024-06-20 16:32:45,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:45,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:46,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:46,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:46,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915085605] [2024-06-20 16:32:46,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915085605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:46,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:46,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:32:46,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544781692] [2024-06-20 16:32:46,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:46,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:32:46,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:46,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:32:46,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:32:46,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:32:46,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 583 transitions, 6984 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:46,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:46,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:32:46,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:48,068 INFO L124 PetriNetUnfolderBase]: 3699/5770 cut-off events. [2024-06-20 16:32:48,068 INFO L125 PetriNetUnfolderBase]: For 2070068/2070078 co-relation queries the response was YES. [2024-06-20 16:32:48,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70246 conditions, 5770 events. 3699/5770 cut-off events. For 2070068/2070078 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 33304 event pairs, 735 based on Foata normal form. 6/5763 useless extension candidates. Maximal degree in co-relation 70045. Up to 5313 conditions per place. [2024-06-20 16:32:48,178 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 521 selfloop transitions, 61 changer transitions 0/617 dead transitions. [2024-06-20 16:32:48,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 617 transitions, 8831 flow [2024-06-20 16:32:48,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:32:48,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:32:48,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:32:48,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-20 16:32:48,179 INFO L175 Difference]: Start difference. First operand has 432 places, 583 transitions, 6984 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:32:48,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 617 transitions, 8831 flow [2024-06-20 16:32:57,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 617 transitions, 8609 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-20 16:32:57,267 INFO L231 Difference]: Finished difference. Result has 434 places, 589 transitions, 7168 flow [2024-06-20 16:32:57,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6762, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7168, PETRI_PLACES=434, PETRI_TRANSITIONS=589} [2024-06-20 16:32:57,267 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-20 16:32:57,267 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 589 transitions, 7168 flow [2024-06-20 16:32:57,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:57,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:57,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:57,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-20 16:32:57,268 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:32:57,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:57,268 INFO L85 PathProgramCache]: Analyzing trace with hash -591668290, now seen corresponding path program 3 times [2024-06-20 16:32:57,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:57,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960590809] [2024-06-20 16:32:57,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:57,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:57,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:58,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:58,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:58,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960590809] [2024-06-20 16:32:58,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960590809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:58,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:58,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:32:58,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442558222] [2024-06-20 16:32:58,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:58,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:32:58,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:58,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:32:58,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:32:58,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:32:58,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 589 transitions, 7168 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:58,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:58,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:32:58,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:59,959 INFO L124 PetriNetUnfolderBase]: 3709/5784 cut-off events. [2024-06-20 16:32:59,960 INFO L125 PetriNetUnfolderBase]: For 2109855/2109865 co-relation queries the response was YES. [2024-06-20 16:33:00,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71076 conditions, 5784 events. 3709/5784 cut-off events. For 2109855/2109865 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 33370 event pairs, 737 based on Foata normal form. 6/5777 useless extension candidates. Maximal degree in co-relation 70874. Up to 5307 conditions per place. [2024-06-20 16:33:00,068 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 517 selfloop transitions, 69 changer transitions 0/621 dead transitions. [2024-06-20 16:33:00,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 621 transitions, 8897 flow [2024-06-20 16:33:00,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:33:00,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:33:00,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-20 16:33:00,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-20 16:33:00,070 INFO L175 Difference]: Start difference. First operand has 434 places, 589 transitions, 7168 flow. Second operand 10 states and 173 transitions. [2024-06-20 16:33:00,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 621 transitions, 8897 flow [2024-06-20 16:33:07,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 621 transitions, 8678 flow, removed 79 selfloop flow, removed 5 redundant places. [2024-06-20 16:33:07,279 INFO L231 Difference]: Finished difference. Result has 439 places, 592 transitions, 7241 flow [2024-06-20 16:33:07,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6949, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7241, PETRI_PLACES=439, PETRI_TRANSITIONS=592} [2024-06-20 16:33:07,292 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-20 16:33:07,293 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 592 transitions, 7241 flow [2024-06-20 16:33:07,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:07,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:07,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:07,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-20 16:33:07,293 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:33:07,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:07,294 INFO L85 PathProgramCache]: Analyzing trace with hash 285477296, now seen corresponding path program 2 times [2024-06-20 16:33:07,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:07,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614954023] [2024-06-20 16:33:07,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:07,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:07,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:08,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:08,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:08,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614954023] [2024-06-20 16:33:08,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614954023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:08,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:08,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:33:08,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629837496] [2024-06-20 16:33:08,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:08,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:33:08,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:08,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:33:08,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:33:08,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:33:08,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 592 transitions, 7241 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:08,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:08,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:33:08,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:10,008 INFO L124 PetriNetUnfolderBase]: 3814/5904 cut-off events. [2024-06-20 16:33:10,009 INFO L125 PetriNetUnfolderBase]: For 2137780/2137784 co-relation queries the response was YES. [2024-06-20 16:33:10,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72605 conditions, 5904 events. 3814/5904 cut-off events. For 2137780/2137784 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 33736 event pairs, 771 based on Foata normal form. 5/5908 useless extension candidates. Maximal degree in co-relation 72401. Up to 5606 conditions per place. [2024-06-20 16:33:10,127 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 555 selfloop transitions, 69 changer transitions 0/628 dead transitions. [2024-06-20 16:33:10,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 628 transitions, 9167 flow [2024-06-20 16:33:10,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:33:10,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:33:10,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-20 16:33:10,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-20 16:33:10,128 INFO L175 Difference]: Start difference. First operand has 439 places, 592 transitions, 7241 flow. Second operand 10 states and 161 transitions. [2024-06-20 16:33:10,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 628 transitions, 9167 flow [2024-06-20 16:33:17,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 628 transitions, 8897 flow, removed 68 selfloop flow, removed 8 redundant places. [2024-06-20 16:33:17,567 INFO L231 Difference]: Finished difference. Result has 442 places, 601 transitions, 7433 flow [2024-06-20 16:33:17,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6971, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7433, PETRI_PLACES=442, PETRI_TRANSITIONS=601} [2024-06-20 16:33:17,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-20 16:33:17,568 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 601 transitions, 7433 flow [2024-06-20 16:33:17,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:17,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:17,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:17,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-20 16:33:17,569 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:33:17,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:17,570 INFO L85 PathProgramCache]: Analyzing trace with hash 285714446, now seen corresponding path program 3 times [2024-06-20 16:33:17,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:17,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902983485] [2024-06-20 16:33:17,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:17,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:17,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:18,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:18,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:18,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902983485] [2024-06-20 16:33:18,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902983485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:18,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:18,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:33:18,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835403556] [2024-06-20 16:33:18,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:18,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:33:18,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:18,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:33:18,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:33:18,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:33:18,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 601 transitions, 7433 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:18,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:18,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:33:18,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:20,248 INFO L124 PetriNetUnfolderBase]: 3811/5900 cut-off events. [2024-06-20 16:33:20,249 INFO L125 PetriNetUnfolderBase]: For 2155766/2155770 co-relation queries the response was YES. [2024-06-20 16:33:20,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72722 conditions, 5900 events. 3811/5900 cut-off events. For 2155766/2155770 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 33678 event pairs, 776 based on Foata normal form. 5/5904 useless extension candidates. Maximal degree in co-relation 72516. Up to 5603 conditions per place. [2024-06-20 16:33:20,346 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 553 selfloop transitions, 70 changer transitions 0/627 dead transitions. [2024-06-20 16:33:20,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 627 transitions, 8776 flow [2024-06-20 16:33:20,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:33:20,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:33:20,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-20 16:33:20,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2024-06-20 16:33:20,347 INFO L175 Difference]: Start difference. First operand has 442 places, 601 transitions, 7433 flow. Second operand 10 states and 159 transitions. [2024-06-20 16:33:20,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 627 transitions, 8776 flow [2024-06-20 16:33:28,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 627 transitions, 8470 flow, removed 122 selfloop flow, removed 5 redundant places. [2024-06-20 16:33:28,549 INFO L231 Difference]: Finished difference. Result has 447 places, 601 transitions, 7273 flow [2024-06-20 16:33:28,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7127, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7273, PETRI_PLACES=447, PETRI_TRANSITIONS=601} [2024-06-20 16:33:28,550 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 404 predicate places. [2024-06-20 16:33:28,550 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 601 transitions, 7273 flow [2024-06-20 16:33:28,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:28,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:28,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:28,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-20 16:33:28,550 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:33:28,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:28,551 INFO L85 PathProgramCache]: Analyzing trace with hash -612715406, now seen corresponding path program 4 times [2024-06-20 16:33:28,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:28,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534458903] [2024-06-20 16:33:28,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:28,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:28,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:29,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:29,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:29,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534458903] [2024-06-20 16:33:29,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534458903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:29,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:29,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:33:29,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886572556] [2024-06-20 16:33:29,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:29,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:33:29,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:29,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:33:29,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:33:29,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:33:29,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 601 transitions, 7273 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:29,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:29,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:33:29,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:31,208 INFO L124 PetriNetUnfolderBase]: 3734/5819 cut-off events. [2024-06-20 16:33:31,208 INFO L125 PetriNetUnfolderBase]: For 2199941/2199949 co-relation queries the response was YES. [2024-06-20 16:33:31,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72674 conditions, 5819 events. 3734/5819 cut-off events. For 2199941/2199949 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 33611 event pairs, 724 based on Foata normal form. 2/5808 useless extension candidates. Maximal degree in co-relation 72466. Up to 5007 conditions per place. [2024-06-20 16:33:31,311 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 471 selfloop transitions, 130 changer transitions 0/639 dead transitions. [2024-06-20 16:33:31,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 639 transitions, 8816 flow [2024-06-20 16:33:31,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:33:31,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:33:31,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 16:33:31,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-20 16:33:31,312 INFO L175 Difference]: Start difference. First operand has 447 places, 601 transitions, 7273 flow. Second operand 9 states and 166 transitions. [2024-06-20 16:33:31,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 639 transitions, 8816 flow [2024-06-20 16:33:42,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 639 transitions, 8676 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-20 16:33:42,200 INFO L231 Difference]: Finished difference. Result has 449 places, 607 transitions, 7588 flow [2024-06-20 16:33:42,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7133, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7588, PETRI_PLACES=449, PETRI_TRANSITIONS=607} [2024-06-20 16:33:42,213 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 406 predicate places. [2024-06-20 16:33:42,218 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 607 transitions, 7588 flow [2024-06-20 16:33:42,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:42,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:42,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:42,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-20 16:33:42,218 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:33:42,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:42,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1468420984, now seen corresponding path program 5 times [2024-06-20 16:33:42,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:42,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335393488] [2024-06-20 16:33:42,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:42,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:42,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:43,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:43,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:43,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335393488] [2024-06-20 16:33:43,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335393488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:43,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:43,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:33:43,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009509637] [2024-06-20 16:33:43,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:43,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:33:43,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:43,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:33:43,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:33:43,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:33:43,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 607 transitions, 7588 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:43,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:43,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:33:43,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:44,934 INFO L124 PetriNetUnfolderBase]: 3760/5859 cut-off events. [2024-06-20 16:33:44,934 INFO L125 PetriNetUnfolderBase]: For 2267929/2267937 co-relation queries the response was YES. [2024-06-20 16:33:45,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74941 conditions, 5859 events. 3760/5859 cut-off events. For 2267929/2267937 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 33871 event pairs, 720 based on Foata normal form. 2/5848 useless extension candidates. Maximal degree in co-relation 74731. Up to 5009 conditions per place. [2024-06-20 16:33:45,049 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 466 selfloop transitions, 140 changer transitions 0/644 dead transitions. [2024-06-20 16:33:45,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 644 transitions, 9587 flow [2024-06-20 16:33:45,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:33:45,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:33:45,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 16:33:45,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-20 16:33:45,051 INFO L175 Difference]: Start difference. First operand has 449 places, 607 transitions, 7588 flow. Second operand 9 states and 166 transitions. [2024-06-20 16:33:45,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 644 transitions, 9587 flow [2024-06-20 16:33:54,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 644 transitions, 9215 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-20 16:33:54,505 INFO L231 Difference]: Finished difference. Result has 453 places, 613 transitions, 7822 flow [2024-06-20 16:33:54,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7216, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7822, PETRI_PLACES=453, PETRI_TRANSITIONS=613} [2024-06-20 16:33:54,505 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 410 predicate places. [2024-06-20 16:33:54,505 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 613 transitions, 7822 flow [2024-06-20 16:33:54,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:54,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:54,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:54,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-20 16:33:54,506 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:33:54,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:54,506 INFO L85 PathProgramCache]: Analyzing trace with hash -612595250, now seen corresponding path program 4 times [2024-06-20 16:33:54,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:54,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899617221] [2024-06-20 16:33:54,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:54,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:54,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:55,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:55,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899617221] [2024-06-20 16:33:55,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899617221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:55,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:55,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:33:55,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20219184] [2024-06-20 16:33:55,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:55,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:33:55,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:55,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:33:55,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:33:55,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:33:55,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 613 transitions, 7822 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:55,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:55,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:33:55,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:57,316 INFO L124 PetriNetUnfolderBase]: 3852/5951 cut-off events. [2024-06-20 16:33:57,316 INFO L125 PetriNetUnfolderBase]: For 2284427/2284431 co-relation queries the response was YES. [2024-06-20 16:33:57,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76016 conditions, 5951 events. 3852/5951 cut-off events. For 2284427/2284431 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 33918 event pairs, 786 based on Foata normal form. 5/5955 useless extension candidates. Maximal degree in co-relation 75805. Up to 5594 conditions per place. [2024-06-20 16:33:57,420 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 543 selfloop transitions, 94 changer transitions 0/641 dead transitions. [2024-06-20 16:33:57,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 641 transitions, 9344 flow [2024-06-20 16:33:57,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:33:57,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:33:57,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-20 16:33:57,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-20 16:33:57,422 INFO L175 Difference]: Start difference. First operand has 453 places, 613 transitions, 7822 flow. Second operand 9 states and 146 transitions. [2024-06-20 16:33:57,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 641 transitions, 9344 flow [2024-06-20 16:34:05,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 641 transitions, 9010 flow, removed 93 selfloop flow, removed 5 redundant places. [2024-06-20 16:34:05,774 INFO L231 Difference]: Finished difference. Result has 457 places, 616 transitions, 7830 flow [2024-06-20 16:34:05,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7488, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7830, PETRI_PLACES=457, PETRI_TRANSITIONS=616} [2024-06-20 16:34:05,774 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 414 predicate places. [2024-06-20 16:34:05,774 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 616 transitions, 7830 flow [2024-06-20 16:34:05,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:05,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:05,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:05,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-20 16:34:05,775 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:34:05,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:05,775 INFO L85 PathProgramCache]: Analyzing trace with hash -607144489, now seen corresponding path program 1 times [2024-06-20 16:34:05,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:05,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029066873] [2024-06-20 16:34:05,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:05,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:05,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:06,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:06,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:06,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029066873] [2024-06-20 16:34:06,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029066873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:06,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:06,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:06,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521860641] [2024-06-20 16:34:06,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:06,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:06,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:06,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:06,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:06,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:34:06,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 616 transitions, 7830 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:06,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:06,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:34:06,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:08,845 INFO L124 PetriNetUnfolderBase]: 3762/5868 cut-off events. [2024-06-20 16:34:08,845 INFO L125 PetriNetUnfolderBase]: For 2304373/2304385 co-relation queries the response was YES. [2024-06-20 16:34:08,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75763 conditions, 5868 events. 3762/5868 cut-off events. For 2304373/2304385 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 34026 event pairs, 742 based on Foata normal form. 5/5860 useless extension candidates. Maximal degree in co-relation 75550. Up to 5338 conditions per place. [2024-06-20 16:34:08,960 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 517 selfloop transitions, 84 changer transitions 0/640 dead transitions. [2024-06-20 16:34:08,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 640 transitions, 9143 flow [2024-06-20 16:34:08,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:08,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:08,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 16:34:08,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-20 16:34:08,961 INFO L175 Difference]: Start difference. First operand has 457 places, 616 transitions, 7830 flow. Second operand 8 states and 145 transitions. [2024-06-20 16:34:08,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 640 transitions, 9143 flow [2024-06-20 16:34:18,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 640 transitions, 8787 flow, removed 87 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:18,507 INFO L231 Difference]: Finished difference. Result has 458 places, 616 transitions, 7658 flow [2024-06-20 16:34:18,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7474, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7658, PETRI_PLACES=458, PETRI_TRANSITIONS=616} [2024-06-20 16:34:18,508 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-20 16:34:18,508 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 616 transitions, 7658 flow [2024-06-20 16:34:18,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:18,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:18,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:18,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-20 16:34:18,508 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:34:18,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:18,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1558252214, now seen corresponding path program 6 times [2024-06-20 16:34:18,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:18,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682544198] [2024-06-20 16:34:18,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:18,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:19,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:19,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:19,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682544198] [2024-06-20 16:34:19,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682544198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:19,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:19,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:19,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712916913] [2024-06-20 16:34:19,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:19,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:19,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:19,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:19,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:19,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:34:19,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 616 transitions, 7658 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:19,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:19,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:34:19,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:21,233 INFO L124 PetriNetUnfolderBase]: 3764/5865 cut-off events. [2024-06-20 16:34:21,233 INFO L125 PetriNetUnfolderBase]: For 2333982/2333990 co-relation queries the response was YES. [2024-06-20 16:34:21,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75689 conditions, 5865 events. 3764/5865 cut-off events. For 2333982/2333990 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 33910 event pairs, 720 based on Foata normal form. 2/5854 useless extension candidates. Maximal degree in co-relation 75475. Up to 5047 conditions per place. [2024-06-20 16:34:21,358 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 477 selfloop transitions, 137 changer transitions 0/653 dead transitions. [2024-06-20 16:34:21,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 653 transitions, 9201 flow [2024-06-20 16:34:21,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:21,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:21,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 16:34:21,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-20 16:34:21,359 INFO L175 Difference]: Start difference. First operand has 458 places, 616 transitions, 7658 flow. Second operand 9 states and 164 transitions. [2024-06-20 16:34:21,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 653 transitions, 9201 flow [2024-06-20 16:34:29,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 653 transitions, 9018 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:29,640 INFO L231 Difference]: Finished difference. Result has 461 places, 622 transitions, 7926 flow [2024-06-20 16:34:29,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7475, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7926, PETRI_PLACES=461, PETRI_TRANSITIONS=622} [2024-06-20 16:34:29,644 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 418 predicate places. [2024-06-20 16:34:29,645 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 622 transitions, 7926 flow [2024-06-20 16:34:29,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:29,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:29,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:29,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-20 16:34:29,645 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:34:29,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:29,646 INFO L85 PathProgramCache]: Analyzing trace with hash -603479576, now seen corresponding path program 7 times [2024-06-20 16:34:29,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:29,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736670547] [2024-06-20 16:34:29,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:29,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:29,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:30,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:30,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736670547] [2024-06-20 16:34:30,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736670547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:30,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:30,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:30,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879727745] [2024-06-20 16:34:30,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:30,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:30,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:30,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:30,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:30,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:34:30,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 622 transitions, 7926 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:30,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:30,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:34:30,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:32,600 INFO L124 PetriNetUnfolderBase]: 3774/5885 cut-off events. [2024-06-20 16:34:32,604 INFO L125 PetriNetUnfolderBase]: For 2371531/2371539 co-relation queries the response was YES. [2024-06-20 16:34:32,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76740 conditions, 5885 events. 3774/5885 cut-off events. For 2371531/2371539 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 34117 event pairs, 720 based on Foata normal form. 2/5874 useless extension candidates. Maximal degree in co-relation 76524. Up to 5029 conditions per place. [2024-06-20 16:34:32,706 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 470 selfloop transitions, 145 changer transitions 0/654 dead transitions. [2024-06-20 16:34:32,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 654 transitions, 9485 flow [2024-06-20 16:34:32,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:32,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:32,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 16:34:32,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-20 16:34:32,707 INFO L175 Difference]: Start difference. First operand has 461 places, 622 transitions, 7926 flow. Second operand 9 states and 163 transitions. [2024-06-20 16:34:32,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 654 transitions, 9485 flow [2024-06-20 16:34:42,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 654 transitions, 9163 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-20 16:34:42,180 INFO L231 Difference]: Finished difference. Result has 465 places, 625 transitions, 8070 flow [2024-06-20 16:34:42,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7604, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8070, PETRI_PLACES=465, PETRI_TRANSITIONS=625} [2024-06-20 16:34:42,180 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 422 predicate places. [2024-06-20 16:34:42,180 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 625 transitions, 8070 flow [2024-06-20 16:34:42,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:42,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:42,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:42,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-20 16:34:42,181 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:34:42,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:42,181 INFO L85 PathProgramCache]: Analyzing trace with hash -607054124, now seen corresponding path program 1 times [2024-06-20 16:34:42,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:42,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500866172] [2024-06-20 16:34:42,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:42,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:42,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:43,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:43,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:43,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500866172] [2024-06-20 16:34:43,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500866172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:43,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:43,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:43,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508165139] [2024-06-20 16:34:43,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:43,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:43,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:43,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:43,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:43,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:34:43,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 625 transitions, 8070 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:43,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:43,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:34:43,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:45,023 INFO L124 PetriNetUnfolderBase]: 3881/6011 cut-off events. [2024-06-20 16:34:45,024 INFO L125 PetriNetUnfolderBase]: For 2403235/2403241 co-relation queries the response was YES. [2024-06-20 16:34:45,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78029 conditions, 6011 events. 3881/6011 cut-off events. For 2403235/2403241 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 34546 event pairs, 789 based on Foata normal form. 6/6016 useless extension candidates. Maximal degree in co-relation 77812. Up to 5622 conditions per place. [2024-06-20 16:34:45,139 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 567 selfloop transitions, 84 changer transitions 0/655 dead transitions. [2024-06-20 16:34:45,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 655 transitions, 9626 flow [2024-06-20 16:34:45,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:34:45,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:34:45,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-20 16:34:45,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 16:34:45,141 INFO L175 Difference]: Start difference. First operand has 465 places, 625 transitions, 8070 flow. Second operand 10 states and 160 transitions. [2024-06-20 16:34:45,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 655 transitions, 9626 flow [2024-06-20 16:34:56,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 655 transitions, 9175 flow, removed 79 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:56,232 INFO L231 Difference]: Finished difference. Result has 470 places, 632 transitions, 7963 flow [2024-06-20 16:34:56,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7626, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7963, PETRI_PLACES=470, PETRI_TRANSITIONS=632} [2024-06-20 16:34:56,232 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 427 predicate places. [2024-06-20 16:34:56,233 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 632 transitions, 7963 flow [2024-06-20 16:34:56,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:56,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:56,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:56,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-20 16:34:56,233 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:34:56,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:56,233 INFO L85 PathProgramCache]: Analyzing trace with hash 222927382, now seen corresponding path program 2 times [2024-06-20 16:34:56,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:56,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755022809] [2024-06-20 16:34:56,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:56,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:56,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:57,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:57,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:57,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755022809] [2024-06-20 16:34:57,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755022809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:57,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:57,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:57,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652692486] [2024-06-20 16:34:57,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:57,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:57,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:57,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:57,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:57,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:34:57,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 632 transitions, 7963 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:57,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:57,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:34:57,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:59,084 INFO L124 PetriNetUnfolderBase]: 3923/6063 cut-off events. [2024-06-20 16:34:59,084 INFO L125 PetriNetUnfolderBase]: For 2479479/2479485 co-relation queries the response was YES. [2024-06-20 16:34:59,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79564 conditions, 6063 events. 3923/6063 cut-off events. For 2479479/2479485 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 34783 event pairs, 784 based on Foata normal form. 6/6068 useless extension candidates. Maximal degree in co-relation 79344. Up to 5617 conditions per place. [2024-06-20 16:34:59,199 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 563 selfloop transitions, 100 changer transitions 0/667 dead transitions. [2024-06-20 16:34:59,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 667 transitions, 10368 flow [2024-06-20 16:34:59,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:59,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:59,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 16:34:59,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-20 16:34:59,200 INFO L175 Difference]: Start difference. First operand has 470 places, 632 transitions, 7963 flow. Second operand 9 states and 155 transitions. [2024-06-20 16:34:59,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 667 transitions, 10368 flow [2024-06-20 16:35:07,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 667 transitions, 10147 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-20 16:35:07,221 INFO L231 Difference]: Finished difference. Result has 474 places, 641 transitions, 8272 flow [2024-06-20 16:35:07,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7742, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8272, PETRI_PLACES=474, PETRI_TRANSITIONS=641} [2024-06-20 16:35:07,221 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 431 predicate places. [2024-06-20 16:35:07,222 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 641 transitions, 8272 flow [2024-06-20 16:35:07,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:07,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:07,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:07,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-20 16:35:07,222 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:35:07,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:07,223 INFO L85 PathProgramCache]: Analyzing trace with hash -603335426, now seen corresponding path program 8 times [2024-06-20 16:35:07,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:07,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642871802] [2024-06-20 16:35:07,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:07,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:07,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:08,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:08,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:08,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642871802] [2024-06-20 16:35:08,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642871802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:08,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:08,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:35:08,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152512957] [2024-06-20 16:35:08,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:08,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:35:08,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:08,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:35:08,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:35:08,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:35:08,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 641 transitions, 8272 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:08,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:08,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:35:08,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:10,099 INFO L124 PetriNetUnfolderBase]: 3871/6019 cut-off events. [2024-06-20 16:35:10,100 INFO L125 PetriNetUnfolderBase]: For 2581142/2581152 co-relation queries the response was YES. [2024-06-20 16:35:10,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81332 conditions, 6019 events. 3871/6019 cut-off events. For 2581142/2581152 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 34914 event pairs, 729 based on Foata normal form. 2/6003 useless extension candidates. Maximal degree in co-relation 81111. Up to 5043 conditions per place. [2024-06-20 16:35:10,210 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 464 selfloop transitions, 171 changer transitions 0/678 dead transitions. [2024-06-20 16:35:10,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 678 transitions, 10854 flow [2024-06-20 16:35:10,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:35:10,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:35:10,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 16:35:10,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-20 16:35:10,211 INFO L175 Difference]: Start difference. First operand has 474 places, 641 transitions, 8272 flow. Second operand 9 states and 165 transitions. [2024-06-20 16:35:10,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 678 transitions, 10854 flow [2024-06-20 16:35:21,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 678 transitions, 10609 flow, removed 81 selfloop flow, removed 4 redundant places. [2024-06-20 16:35:21,596 INFO L231 Difference]: Finished difference. Result has 479 places, 650 transitions, 8903 flow [2024-06-20 16:35:21,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8027, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8903, PETRI_PLACES=479, PETRI_TRANSITIONS=650} [2024-06-20 16:35:21,597 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 436 predicate places. [2024-06-20 16:35:21,597 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 650 transitions, 8903 flow [2024-06-20 16:35:21,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:21,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:21,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:21,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-20 16:35:21,597 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:35:21,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:21,598 INFO L85 PathProgramCache]: Analyzing trace with hash -603329474, now seen corresponding path program 3 times [2024-06-20 16:35:21,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:21,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496496176] [2024-06-20 16:35:21,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:21,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:22,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:22,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:22,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496496176] [2024-06-20 16:35:22,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496496176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:22,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:22,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:35:22,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786229790] [2024-06-20 16:35:22,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:22,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:35:22,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:22,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:35:22,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:35:22,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:35:22,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 650 transitions, 8903 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:22,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:22,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:35:22,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:24,584 INFO L124 PetriNetUnfolderBase]: 3951/6100 cut-off events. [2024-06-20 16:35:24,585 INFO L125 PetriNetUnfolderBase]: For 2577514/2577520 co-relation queries the response was YES. [2024-06-20 16:35:24,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82133 conditions, 6100 events. 3951/6100 cut-off events. For 2577514/2577520 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 34993 event pairs, 783 based on Foata normal form. 6/6105 useless extension candidates. Maximal degree in co-relation 81910. Up to 5659 conditions per place. [2024-06-20 16:35:24,702 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 568 selfloop transitions, 103 changer transitions 0/675 dead transitions. [2024-06-20 16:35:24,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 675 transitions, 10696 flow [2024-06-20 16:35:24,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:35:24,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:35:24,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 16:35:24,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 16:35:24,704 INFO L175 Difference]: Start difference. First operand has 479 places, 650 transitions, 8903 flow. Second operand 9 states and 153 transitions. [2024-06-20 16:35:24,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 675 transitions, 10696 flow [2024-06-20 16:35:35,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 675 transitions, 10278 flow, removed 146 selfloop flow, removed 4 redundant places. [2024-06-20 16:35:35,722 INFO L231 Difference]: Finished difference. Result has 484 places, 650 transitions, 8697 flow [2024-06-20 16:35:35,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8485, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8697, PETRI_PLACES=484, PETRI_TRANSITIONS=650} [2024-06-20 16:35:35,722 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 441 predicate places. [2024-06-20 16:35:35,722 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 650 transitions, 8697 flow [2024-06-20 16:35:35,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:35,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:35,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:35,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-20 16:35:35,723 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:35:35,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:35,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1459166554, now seen corresponding path program 9 times [2024-06-20 16:35:35,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:35,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081223921] [2024-06-20 16:35:35,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:35,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:36,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:36,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:36,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081223921] [2024-06-20 16:35:36,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081223921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:36,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:36,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:35:36,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714552212] [2024-06-20 16:35:36,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:36,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:35:36,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:36,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:35:36,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:35:36,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:35:36,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 650 transitions, 8697 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:36,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:36,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:35:36,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:38,813 INFO L124 PetriNetUnfolderBase]: 3859/6000 cut-off events. [2024-06-20 16:35:38,814 INFO L125 PetriNetUnfolderBase]: For 2573530/2573540 co-relation queries the response was YES. [2024-06-20 16:35:38,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80470 conditions, 6000 events. 3859/6000 cut-off events. For 2573530/2573540 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 34817 event pairs, 725 based on Foata normal form. 2/5984 useless extension candidates. Maximal degree in co-relation 80245. Up to 5032 conditions per place. [2024-06-20 16:35:38,997 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 465 selfloop transitions, 170 changer transitions 0/678 dead transitions. [2024-06-20 16:35:38,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 678 transitions, 10765 flow [2024-06-20 16:35:38,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:35:38,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:35:38,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 16:35:38,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-20 16:35:38,999 INFO L175 Difference]: Start difference. First operand has 484 places, 650 transitions, 8697 flow. Second operand 9 states and 165 transitions. [2024-06-20 16:35:38,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 678 transitions, 10765 flow [2024-06-20 16:35:49,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 678 transitions, 10442 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-20 16:35:49,787 INFO L231 Difference]: Finished difference. Result has 486 places, 650 transitions, 8720 flow [2024-06-20 16:35:49,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8374, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8720, PETRI_PLACES=486, PETRI_TRANSITIONS=650} [2024-06-20 16:35:49,787 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 443 predicate places. [2024-06-20 16:35:49,788 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 650 transitions, 8720 flow [2024-06-20 16:35:49,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:49,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:49,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:49,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-20 16:35:49,788 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:35:49,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:49,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1459154805, now seen corresponding path program 1 times [2024-06-20 16:35:49,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:49,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739005057] [2024-06-20 16:35:49,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:49,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:50,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:50,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:50,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739005057] [2024-06-20 16:35:50,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739005057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:50,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:50,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:35:50,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819254016] [2024-06-20 16:35:50,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:50,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:35:50,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:50,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:35:50,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:35:50,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:35:50,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 650 transitions, 8720 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:50,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:50,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:35:50,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:53,124 INFO L124 PetriNetUnfolderBase]: 3950/6102 cut-off events. [2024-06-20 16:35:53,124 INFO L125 PetriNetUnfolderBase]: For 2571422/2571430 co-relation queries the response was YES. [2024-06-20 16:35:53,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81067 conditions, 6102 events. 3950/6102 cut-off events. For 2571422/2571430 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 35066 event pairs, 783 based on Foata normal form. 9/6110 useless extension candidates. Maximal degree in co-relation 80841. Up to 5853 conditions per place. [2024-06-20 16:35:53,243 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 624 selfloop transitions, 45 changer transitions 0/673 dead transitions. [2024-06-20 16:35:53,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 673 transitions, 10236 flow [2024-06-20 16:35:53,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:35:53,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:35:53,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-20 16:35:53,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-20 16:35:53,245 INFO L175 Difference]: Start difference. First operand has 486 places, 650 transitions, 8720 flow. Second operand 9 states and 141 transitions. [2024-06-20 16:35:53,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 673 transitions, 10236 flow [2024-06-20 16:36:02,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 673 transitions, 9711 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-20 16:36:02,060 INFO L231 Difference]: Finished difference. Result has 486 places, 653 transitions, 8399 flow [2024-06-20 16:36:02,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8195, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8399, PETRI_PLACES=486, PETRI_TRANSITIONS=653} [2024-06-20 16:36:02,060 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 443 predicate places. [2024-06-20 16:36:02,060 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 653 transitions, 8399 flow [2024-06-20 16:36:02,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:02,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:02,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:02,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-20 16:36:02,061 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:36:02,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:02,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1459155208, now seen corresponding path program 5 times [2024-06-20 16:36:02,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:02,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572513127] [2024-06-20 16:36:02,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:02,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:02,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:02,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:02,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572513127] [2024-06-20 16:36:02,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572513127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:02,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:02,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:36:02,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291941502] [2024-06-20 16:36:02,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:02,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:36:02,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:02,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:36:02,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:36:03,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:36:03,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 653 transitions, 8399 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:03,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:03,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:36:03,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:05,254 INFO L124 PetriNetUnfolderBase]: 3963/6114 cut-off events. [2024-06-20 16:36:05,254 INFO L125 PetriNetUnfolderBase]: For 2597560/2597564 co-relation queries the response was YES. [2024-06-20 16:36:05,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81196 conditions, 6114 events. 3963/6114 cut-off events. For 2597560/2597564 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 34925 event pairs, 781 based on Foata normal form. 5/6118 useless extension candidates. Maximal degree in co-relation 80971. Up to 5711 conditions per place. [2024-06-20 16:36:05,377 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 567 selfloop transitions, 110 changer transitions 0/681 dead transitions. [2024-06-20 16:36:05,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 681 transitions, 10466 flow [2024-06-20 16:36:05,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:36:05,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:36:05,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-20 16:36:05,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-20 16:36:05,378 INFO L175 Difference]: Start difference. First operand has 486 places, 653 transitions, 8399 flow. Second operand 9 states and 146 transitions. [2024-06-20 16:36:05,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 681 transitions, 10466 flow [2024-06-20 16:36:16,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 681 transitions, 10284 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-20 16:36:16,319 INFO L231 Difference]: Finished difference. Result has 488 places, 659 transitions, 8753 flow [2024-06-20 16:36:16,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8217, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8753, PETRI_PLACES=488, PETRI_TRANSITIONS=659} [2024-06-20 16:36:16,319 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 445 predicate places. [2024-06-20 16:36:16,320 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 659 transitions, 8753 flow [2024-06-20 16:36:16,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:16,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:16,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:16,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-20 16:36:16,320 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:36:16,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:16,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1630079570, now seen corresponding path program 6 times [2024-06-20 16:36:16,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:16,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300848205] [2024-06-20 16:36:16,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:16,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:16,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:17,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:17,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300848205] [2024-06-20 16:36:17,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300848205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:17,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:17,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:36:17,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012792778] [2024-06-20 16:36:17,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:17,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:36:17,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:17,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:36:17,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:36:17,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:36:17,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 659 transitions, 8753 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:17,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:17,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:36:17,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:19,478 INFO L124 PetriNetUnfolderBase]: 3960/6110 cut-off events. [2024-06-20 16:36:19,479 INFO L125 PetriNetUnfolderBase]: For 2624687/2624691 co-relation queries the response was YES. [2024-06-20 16:36:19,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81602 conditions, 6110 events. 3960/6110 cut-off events. For 2624687/2624691 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 34903 event pairs, 781 based on Foata normal form. 5/6114 useless extension candidates. Maximal degree in co-relation 81376. Up to 5708 conditions per place. [2024-06-20 16:36:19,737 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 570 selfloop transitions, 106 changer transitions 0/680 dead transitions. [2024-06-20 16:36:19,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 680 transitions, 10190 flow [2024-06-20 16:36:19,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:36:19,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:36:19,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-20 16:36:19,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-20 16:36:19,739 INFO L175 Difference]: Start difference. First operand has 488 places, 659 transitions, 8753 flow. Second operand 9 states and 146 transitions. [2024-06-20 16:36:19,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 680 transitions, 10190 flow [2024-06-20 16:36:30,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 680 transitions, 9809 flow, removed 130 selfloop flow, removed 5 redundant places. [2024-06-20 16:36:30,025 INFO L231 Difference]: Finished difference. Result has 492 places, 659 transitions, 8590 flow [2024-06-20 16:36:30,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8372, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8590, PETRI_PLACES=492, PETRI_TRANSITIONS=659} [2024-06-20 16:36:30,026 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 449 predicate places. [2024-06-20 16:36:30,026 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 659 transitions, 8590 flow [2024-06-20 16:36:30,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:30,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:30,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:30,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-20 16:36:30,026 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:36:30,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:30,027 INFO L85 PathProgramCache]: Analyzing trace with hash 592768818, now seen corresponding path program 10 times [2024-06-20 16:36:30,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:30,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132903997] [2024-06-20 16:36:30,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:30,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:30,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:30,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:30,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:30,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132903997] [2024-06-20 16:36:30,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132903997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:30,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:30,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:36:30,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112894055] [2024-06-20 16:36:30,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:30,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:36:30,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:30,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:36:30,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:36:31,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:36:31,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 659 transitions, 8590 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:31,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:31,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:36:31,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:33,218 INFO L124 PetriNetUnfolderBase]: 3929/6106 cut-off events. [2024-06-20 16:36:33,218 INFO L125 PetriNetUnfolderBase]: For 2777442/2777452 co-relation queries the response was YES. [2024-06-20 16:36:33,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84264 conditions, 6106 events. 3929/6106 cut-off events. For 2777442/2777452 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 35427 event pairs, 763 based on Foata normal form. 2/6090 useless extension candidates. Maximal degree in co-relation 84036. Up to 4974 conditions per place. [2024-06-20 16:36:33,328 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 446 selfloop transitions, 204 changer transitions 0/695 dead transitions. [2024-06-20 16:36:33,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 695 transitions, 11686 flow [2024-06-20 16:36:33,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:36:33,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:36:33,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 16:36:33,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-20 16:36:33,329 INFO L175 Difference]: Start difference. First operand has 492 places, 659 transitions, 8590 flow. Second operand 9 states and 164 transitions. [2024-06-20 16:36:33,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 695 transitions, 11686 flow [2024-06-20 16:36:45,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 695 transitions, 11428 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-20 16:36:45,856 INFO L231 Difference]: Finished difference. Result has 493 places, 671 transitions, 9432 flow [2024-06-20 16:36:45,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8332, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9432, PETRI_PLACES=493, PETRI_TRANSITIONS=671} [2024-06-20 16:36:45,857 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 450 predicate places. [2024-06-20 16:36:45,857 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 671 transitions, 9432 flow [2024-06-20 16:36:45,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:45,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:45,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:45,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-20 16:36:45,857 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:36:45,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:45,858 INFO L85 PathProgramCache]: Analyzing trace with hash -263056544, now seen corresponding path program 7 times [2024-06-20 16:36:45,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:45,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156293334] [2024-06-20 16:36:45,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:45,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:46,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:46,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:46,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156293334] [2024-06-20 16:36:46,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156293334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:46,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:46,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:36:46,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325131180] [2024-06-20 16:36:46,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:46,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:36:46,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:46,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:36:46,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:36:46,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:36:46,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 671 transitions, 9432 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:46,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:46,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:36:46,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:49,115 INFO L124 PetriNetUnfolderBase]: 4047/6244 cut-off events. [2024-06-20 16:36:49,115 INFO L125 PetriNetUnfolderBase]: For 2835078/2835082 co-relation queries the response was YES. [2024-06-20 16:36:49,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86935 conditions, 6244 events. 4047/6244 cut-off events. For 2835078/2835082 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 35813 event pairs, 810 based on Foata normal form. 5/6248 useless extension candidates. Maximal degree in co-relation 86706. Up to 5733 conditions per place. [2024-06-20 16:36:49,228 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 550 selfloop transitions, 148 changer transitions 0/702 dead transitions. [2024-06-20 16:36:49,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 702 transitions, 12510 flow [2024-06-20 16:36:49,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:36:49,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:36:49,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-20 16:36:49,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-20 16:36:49,229 INFO L175 Difference]: Start difference. First operand has 493 places, 671 transitions, 9432 flow. Second operand 9 states and 148 transitions. [2024-06-20 16:36:49,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 702 transitions, 12510 flow [2024-06-20 16:36:59,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 702 transitions, 12134 flow, removed 133 selfloop flow, removed 3 redundant places. [2024-06-20 16:36:59,360 INFO L231 Difference]: Finished difference. Result has 499 places, 683 transitions, 10004 flow [2024-06-20 16:36:59,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9064, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10004, PETRI_PLACES=499, PETRI_TRANSITIONS=683} [2024-06-20 16:36:59,360 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 456 predicate places. [2024-06-20 16:36:59,360 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 683 transitions, 10004 flow [2024-06-20 16:36:59,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:59,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:59,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:59,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-20 16:36:59,361 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:36:59,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:59,361 INFO L85 PathProgramCache]: Analyzing trace with hash 600399127, now seen corresponding path program 2 times [2024-06-20 16:36:59,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:59,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661029481] [2024-06-20 16:36:59,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:59,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15