./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix052_tso.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix052_tso.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix052_tso.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix052_tso.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 19:53:35,473 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:53:35,527 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:53:35,530 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:53:35,531 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:53:35,542 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:53:35,543 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:53:35,543 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:53:35,543 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:53:35,544 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:53:35,544 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:53:35,544 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:53:35,545 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:53:35,545 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:53:35,545 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:53:35,545 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:53:35,546 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:53:35,546 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:53:35,546 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:53:35,546 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:53:35,547 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:53:35,547 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:53:35,547 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:53:35,547 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:53:35,548 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:53:35,548 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:53:35,548 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:53:35,548 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:53:35,549 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:53:35,549 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:53:35,549 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:53:35,549 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:53:35,549 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:53:35,550 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:53:35,550 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:53:35,550 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:53:35,550 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:53:35,550 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:53:35,551 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:53:35,551 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:53:35,551 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:53:35,551 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:53:35,552 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:53:35,552 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:53:35,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:53:35,780 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:53:35,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:53:35,784 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:53:35,785 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:53:35,786 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix052_tso.oepc.yml/witness.yml [2024-06-03 19:53:35,946 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:53:35,946 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:53:35,948 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix052_tso.oepc.i [2024-06-03 19:53:37,040 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:53:37,249 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:53:37,250 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix052_tso.oepc.i [2024-06-03 19:53:37,267 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e9b96c88/2291767ac8644fabb9ba34e7b15aeec2/FLAG0f27b2579 [2024-06-03 19:53:37,298 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e9b96c88/2291767ac8644fabb9ba34e7b15aeec2 [2024-06-03 19:53:37,299 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:53:37,300 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:53:37,301 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:53:37,301 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:53:37,305 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:53:37,305 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:53:35" (1/2) ... [2024-06-03 19:53:37,306 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d171621 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:53:37, skipping insertion in model container [2024-06-03 19:53:37,306 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:53:35" (1/2) ... [2024-06-03 19:53:37,307 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@984d486 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:53:37, skipping insertion in model container [2024-06-03 19:53:37,307 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:53:37" (2/2) ... [2024-06-03 19:53:37,307 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d171621 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:53:37, skipping insertion in model container [2024-06-03 19:53:37,307 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:53:37" (2/2) ... [2024-06-03 19:53:37,308 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:53:37,375 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:53:37,376 INFO L97 edCorrectnessWitness]: Location invariant before [L823-L823] (((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) [2024-06-03 19:53:37,376 INFO L97 edCorrectnessWitness]: Location invariant before [L825-L825] (((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) [2024-06-03 19:53:37,376 INFO L97 edCorrectnessWitness]: Location invariant before [L826-L826] (((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) [2024-06-03 19:53:37,377 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:53:37,377 INFO L106 edCorrectnessWitness]: ghost_update [L821-L821] multithreaded = 1; [2024-06-03 19:53:37,412 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:53:37,730 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:53:37,737 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:53:37,838 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:53:37,866 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:53:37,867 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:53:37 WrapperNode [2024-06-03 19:53:37,867 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:53:37,868 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:53:37,868 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:53:37,868 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:53:37,873 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:53:37" (1/1) ... [2024-06-03 19:53:37,898 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:53:37" (1/1) ... [2024-06-03 19:53:37,936 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 144 [2024-06-03 19:53:37,939 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:53:37,939 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:53:37,940 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:53:37,940 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:53:37,948 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:53:37" (1/1) ... [2024-06-03 19:53:37,948 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:53:37" (1/1) ... [2024-06-03 19:53:37,962 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:53:37" (1/1) ... [2024-06-03 19:53:37,979 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]. [2024-06-03 19:53:37,985 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:53:37" (1/1) ... [2024-06-03 19:53:37,985 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:53:37" (1/1) ... [2024-06-03 19:53:37,994 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:53:37" (1/1) ... [2024-06-03 19:53:37,995 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:53:37" (1/1) ... [2024-06-03 19:53:37,996 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:53:37" (1/1) ... [2024-06-03 19:53:37,997 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:53:37" (1/1) ... [2024-06-03 19:53:38,000 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:53:38,000 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:53:38,000 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:53:38,001 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:53:38,001 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:53:37" (1/1) ... [2024-06-03 19:53:38,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:53:38,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:53:38,104 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) [2024-06-03 19:53:38,126 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 [2024-06-03 19:53:38,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:53:38,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:53:38,139 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:53:38,139 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:53:38,140 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:53:38,140 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:53:38,140 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:53:38,140 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:53:38,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:53:38,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:53:38,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:53:38,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:53:38,142 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 19:53:38,230 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:53:38,232 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:53:38,507 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:53:38,507 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:53:38,620 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:53:38,621 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:53:38,621 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:53:38 BoogieIcfgContainer [2024-06-03 19:53:38,621 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:53:38,623 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:53:38,623 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:53:38,625 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:53:38,625 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:53:35" (1/4) ... [2024-06-03 19:53:38,626 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ff5dc9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:53:38, skipping insertion in model container [2024-06-03 19:53:38,626 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:53:37" (2/4) ... [2024-06-03 19:53:38,626 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ff5dc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:53:38, skipping insertion in model container [2024-06-03 19:53:38,626 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:53:37" (3/4) ... [2024-06-03 19:53:38,626 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ff5dc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:53:38, skipping insertion in model container [2024-06-03 19:53:38,627 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:53:38" (4/4) ... [2024-06-03 19:53:38,627 INFO L112 eAbstractionObserver]: Analyzing ICFG mix052_tso.oepc.i [2024-06-03 19:53:38,640 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:53:38,640 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 19:53:38,640 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:53:38,676 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:53:38,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-03 19:53:38,719 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-03 19:53:38,719 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:53:38,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 19:53:38,721 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-03 19:53:38,723 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-03 19:53:38,729 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:53:38,734 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;@3a8e6860, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:53:38,734 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 19:53:38,766 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:53:38,767 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 19:53:38,767 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:53:38,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:38,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:53:38,768 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)] === [2024-06-03 19:53:38,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:38,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1322398027, now seen corresponding path program 1 times [2024-06-03 19:53:38,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:38,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666340365] [2024-06-03 19:53:38,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:38,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:38,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:39,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:39,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:39,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666340365] [2024-06-03 19:53:39,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666340365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:39,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:39,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:53:39,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558399230] [2024-06-03 19:53:39,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:39,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:53:39,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:39,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:53:39,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:53:39,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-03 19:53:39,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:39,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:39,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-03 19:53:39,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:40,156 INFO L124 PetriNetUnfolderBase]: 1156/1826 cut-off events. [2024-06-03 19:53:40,156 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-03 19:53:40,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3655 conditions, 1826 events. 1156/1826 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8844 event pairs, 805 based on Foata normal form. 1/1790 useless extension candidates. Maximal degree in co-relation 3640. Up to 1740 conditions per place. [2024-06-03 19:53:40,173 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 33 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-03 19:53:40,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 173 flow [2024-06-03 19:53:40,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:53:40,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:53:40,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-06-03 19:53:40,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-03 19:53:40,184 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 70 transitions. [2024-06-03 19:53:40,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 173 flow [2024-06-03 19:53:40,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 19:53:40,189 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-03 19:53:40,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-03 19:53:40,193 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-03 19:53:40,193 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-03 19:53:40,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:40,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:40,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:40,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:53:40,194 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)] === [2024-06-03 19:53:40,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:40,195 INFO L85 PathProgramCache]: Analyzing trace with hash 485861844, now seen corresponding path program 1 times [2024-06-03 19:53:40,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:40,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029744002] [2024-06-03 19:53:40,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:40,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:40,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:40,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:40,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:40,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029744002] [2024-06-03 19:53:40,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029744002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:40,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:40,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:53:40,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168099101] [2024-06-03 19:53:40,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:40,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:53:40,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:40,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:53:40,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:53:40,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 19:53:40,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:40,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:40,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 19:53:40,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:41,126 INFO L124 PetriNetUnfolderBase]: 1357/2071 cut-off events. [2024-06-03 19:53:41,126 INFO L125 PetriNetUnfolderBase]: For 393/393 co-relation queries the response was YES. [2024-06-03 19:53:41,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4740 conditions, 2071 events. 1357/2071 cut-off events. For 393/393 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9673 event pairs, 840 based on Foata normal form. 3/2071 useless extension candidates. Maximal degree in co-relation 4725. Up to 2013 conditions per place. [2024-06-03 19:53:41,136 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 41 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-03 19:53:41,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 242 flow [2024-06-03 19:53:41,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:53:41,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:53:41,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 87 transitions. [2024-06-03 19:53:41,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-03 19:53:41,137 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 87 transitions. [2024-06-03 19:53:41,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 242 flow [2024-06-03 19:53:41,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:53:41,139 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-03 19:53:41,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-03 19:53:41,140 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-03 19:53:41,140 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-03 19:53:41,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:41,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:41,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:41,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:53:41,141 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)] === [2024-06-03 19:53:41,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:41,142 INFO L85 PathProgramCache]: Analyzing trace with hash -2118150516, now seen corresponding path program 1 times [2024-06-03 19:53:41,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:41,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101646502] [2024-06-03 19:53:41,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:41,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:41,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:41,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:41,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:41,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101646502] [2024-06-03 19:53:41,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101646502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:41,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:41,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 19:53:41,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972575599] [2024-06-03 19:53:41,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:41,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 19:53:41,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:41,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 19:53:41,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 19:53:41,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 19:53:41,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 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) [2024-06-03 19:53:41,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:41,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 19:53:41,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:42,035 INFO L124 PetriNetUnfolderBase]: 1345/2055 cut-off events. [2024-06-03 19:53:42,036 INFO L125 PetriNetUnfolderBase]: For 1116/1116 co-relation queries the response was YES. [2024-06-03 19:53:42,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5229 conditions, 2055 events. 1345/2055 cut-off events. For 1116/1116 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9597 event pairs, 592 based on Foata normal form. 6/2058 useless extension candidates. Maximal degree in co-relation 5212. Up to 1965 conditions per place. [2024-06-03 19:53:42,046 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 49 selfloop transitions, 10 changer transitions 0/63 dead transitions. [2024-06-03 19:53:42,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 63 transitions, 324 flow [2024-06-03 19:53:42,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:53:42,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:53:42,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2024-06-03 19:53:42,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5219512195121951 [2024-06-03 19:53:42,051 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 107 transitions. [2024-06-03 19:53:42,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 63 transitions, 324 flow [2024-06-03 19:53:42,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 63 transitions, 310 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-03 19:53:42,055 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 172 flow [2024-06-03 19:53:42,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, 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=5, PETRI_FLOW=172, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-03 19:53:42,056 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2024-06-03 19:53:42,057 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 172 flow [2024-06-03 19:53:42,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 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) [2024-06-03 19:53:42,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:42,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:42,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:53:42,057 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:53:42,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:42,058 INFO L85 PathProgramCache]: Analyzing trace with hash 271901579, now seen corresponding path program 1 times [2024-06-03 19:53:42,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:42,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874595928] [2024-06-03 19:53:42,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:42,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:43,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:43,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:43,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874595928] [2024-06-03 19:53:43,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874595928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:43,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:43,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:53:43,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749932402] [2024-06-03 19:53:43,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:43,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:53:43,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:43,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:53:43,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:53:43,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 19:53:43,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 172 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) [2024-06-03 19:53:43,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:43,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 19:53:43,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:43,423 INFO L124 PetriNetUnfolderBase]: 1336/2038 cut-off events. [2024-06-03 19:53:43,424 INFO L125 PetriNetUnfolderBase]: For 2056/2056 co-relation queries the response was YES. [2024-06-03 19:53:43,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5696 conditions, 2038 events. 1336/2038 cut-off events. For 2056/2056 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9456 event pairs, 450 based on Foata normal form. 6/2041 useless extension candidates. Maximal degree in co-relation 5678. Up to 1920 conditions per place. [2024-06-03 19:53:43,433 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 53 selfloop transitions, 12 changer transitions 0/69 dead transitions. [2024-06-03 19:53:43,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 69 transitions, 378 flow [2024-06-03 19:53:43,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:53:43,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:53:43,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-03 19:53:43,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-03 19:53:43,435 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 172 flow. Second operand 6 states and 122 transitions. [2024-06-03 19:53:43,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 69 transitions, 378 flow [2024-06-03 19:53:43,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 69 transitions, 354 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 19:53:43,438 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 191 flow [2024-06-03 19:53:43,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=191, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2024-06-03 19:53:43,439 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-03 19:53:43,439 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 191 flow [2024-06-03 19:53:43,439 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) [2024-06-03 19:53:43,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:43,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:43,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:53:43,440 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)] === [2024-06-03 19:53:43,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:43,440 INFO L85 PathProgramCache]: Analyzing trace with hash -714505217, now seen corresponding path program 1 times [2024-06-03 19:53:43,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:43,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504449849] [2024-06-03 19:53:43,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:43,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:44,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:44,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:44,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504449849] [2024-06-03 19:53:44,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504449849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:44,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:44,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:53:44,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60918964] [2024-06-03 19:53:44,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:44,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:53:44,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:44,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:53:44,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:53:44,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 19:53:44,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 191 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:44,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:44,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 19:53:44,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:44,414 INFO L124 PetriNetUnfolderBase]: 1124/1817 cut-off events. [2024-06-03 19:53:44,415 INFO L125 PetriNetUnfolderBase]: For 2652/2652 co-relation queries the response was YES. [2024-06-03 19:53:44,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5289 conditions, 1817 events. 1124/1817 cut-off events. For 2652/2652 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8842 event pairs, 527 based on Foata normal form. 2/1816 useless extension candidates. Maximal degree in co-relation 5270. Up to 1682 conditions per place. [2024-06-03 19:53:44,424 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 43 selfloop transitions, 8 changer transitions 0/56 dead transitions. [2024-06-03 19:53:44,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 56 transitions, 337 flow [2024-06-03 19:53:44,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:53:44,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:53:44,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-03 19:53:44,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 19:53:44,425 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 191 flow. Second operand 5 states and 90 transitions. [2024-06-03 19:53:44,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 56 transitions, 337 flow [2024-06-03 19:53:44,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 56 transitions, 304 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 19:53:44,428 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 204 flow [2024-06-03 19:53:44,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-03 19:53:44,429 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-03 19:53:44,429 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 204 flow [2024-06-03 19:53:44,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:44,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:44,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:44,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:53:44,430 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)] === [2024-06-03 19:53:44,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:44,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1636478068, now seen corresponding path program 1 times [2024-06-03 19:53:44,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:44,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742950126] [2024-06-03 19:53:44,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:44,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:45,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:45,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:45,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742950126] [2024-06-03 19:53:45,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742950126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:45,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:45,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:53:45,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516143614] [2024-06-03 19:53:45,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:45,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:53:45,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:45,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:53:45,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:53:45,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:53:45,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 204 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:45,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:45,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:53:45,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:45,534 INFO L124 PetriNetUnfolderBase]: 1342/2047 cut-off events. [2024-06-03 19:53:45,534 INFO L125 PetriNetUnfolderBase]: For 4400/4400 co-relation queries the response was YES. [2024-06-03 19:53:45,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6518 conditions, 2047 events. 1342/2047 cut-off events. For 4400/4400 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9481 event pairs, 626 based on Foata normal form. 2/2046 useless extension candidates. Maximal degree in co-relation 6497. Up to 1980 conditions per place. [2024-06-03 19:53:45,545 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 51 selfloop transitions, 11 changer transitions 0/66 dead transitions. [2024-06-03 19:53:45,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 66 transitions, 394 flow [2024-06-03 19:53:45,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:53:45,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:53:45,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-03 19:53:45,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-03 19:53:45,546 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 204 flow. Second operand 6 states and 104 transitions. [2024-06-03 19:53:45,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 66 transitions, 394 flow [2024-06-03 19:53:45,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 66 transitions, 372 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-03 19:53:45,549 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 238 flow [2024-06-03 19:53:45,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=238, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-06-03 19:53:45,550 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2024-06-03 19:53:45,550 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 238 flow [2024-06-03 19:53:45,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:45,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:45,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:45,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:53:45,551 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)] === [2024-06-03 19:53:45,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:45,551 INFO L85 PathProgramCache]: Analyzing trace with hash 436388652, now seen corresponding path program 2 times [2024-06-03 19:53:45,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:45,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433055433] [2024-06-03 19:53:45,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:45,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:45,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:46,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:46,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:46,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433055433] [2024-06-03 19:53:46,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433055433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:46,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:46,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:53:46,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711802842] [2024-06-03 19:53:46,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:46,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:53:46,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:46,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:53:46,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:53:46,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:53:46,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 238 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:46,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:46,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:53:46,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:46,668 INFO L124 PetriNetUnfolderBase]: 1337/2042 cut-off events. [2024-06-03 19:53:46,668 INFO L125 PetriNetUnfolderBase]: For 5954/5966 co-relation queries the response was YES. [2024-06-03 19:53:46,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6993 conditions, 2042 events. 1337/2042 cut-off events. For 5954/5966 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9463 event pairs, 627 based on Foata normal form. 10/2047 useless extension candidates. Maximal degree in co-relation 6971. Up to 1955 conditions per place. [2024-06-03 19:53:46,681 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 46 selfloop transitions, 16 changer transitions 0/66 dead transitions. [2024-06-03 19:53:46,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 66 transitions, 426 flow [2024-06-03 19:53:46,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:53:46,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:53:46,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-03 19:53:46,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186991869918699 [2024-06-03 19:53:46,684 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 238 flow. Second operand 6 states and 103 transitions. [2024-06-03 19:53:46,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 66 transitions, 426 flow [2024-06-03 19:53:46,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 66 transitions, 394 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-03 19:53:46,688 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 278 flow [2024-06-03 19:53:46,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=278, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-06-03 19:53:46,689 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-03 19:53:46,690 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 278 flow [2024-06-03 19:53:46,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:46,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:46,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:46,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:53:46,690 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)] === [2024-06-03 19:53:46,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:46,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1608094034, now seen corresponding path program 1 times [2024-06-03 19:53:46,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:46,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070542692] [2024-06-03 19:53:46,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:46,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:46,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:47,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:47,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:47,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070542692] [2024-06-03 19:53:47,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070542692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:47,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:47,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:53:47,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408291747] [2024-06-03 19:53:47,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:47,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:53:47,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:47,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:53:47,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:53:47,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:53:47,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 278 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:47,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:47,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:53:47,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:48,043 INFO L124 PetriNetUnfolderBase]: 1377/2170 cut-off events. [2024-06-03 19:53:48,043 INFO L125 PetriNetUnfolderBase]: For 7619/7619 co-relation queries the response was YES. [2024-06-03 19:53:48,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7686 conditions, 2170 events. 1377/2170 cut-off events. For 7619/7619 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10329 event pairs, 625 based on Foata normal form. 2/2169 useless extension candidates. Maximal degree in co-relation 7663. Up to 2033 conditions per place. [2024-06-03 19:53:48,060 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 58 selfloop transitions, 14 changer transitions 0/76 dead transitions. [2024-06-03 19:53:48,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 509 flow [2024-06-03 19:53:48,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:53:48,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:53:48,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-03 19:53:48,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-03 19:53:48,063 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 278 flow. Second operand 7 states and 116 transitions. [2024-06-03 19:53:48,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 509 flow [2024-06-03 19:53:48,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 76 transitions, 458 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 19:53:48,070 INFO L231 Difference]: Finished difference. Result has 60 places, 57 transitions, 314 flow [2024-06-03 19:53:48,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=314, PETRI_PLACES=60, PETRI_TRANSITIONS=57} [2024-06-03 19:53:48,072 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-03 19:53:48,072 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 57 transitions, 314 flow [2024-06-03 19:53:48,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:48,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:48,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:48,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:53:48,073 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)] === [2024-06-03 19:53:48,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:48,073 INFO L85 PathProgramCache]: Analyzing trace with hash -414428582, now seen corresponding path program 1 times [2024-06-03 19:53:48,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:48,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393900579] [2024-06-03 19:53:48,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:48,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:48,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:48,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:48,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:48,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393900579] [2024-06-03 19:53:48,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393900579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:48,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:48,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:53:48,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164520914] [2024-06-03 19:53:48,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:48,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:53:48,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:48,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:53:48,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:53:48,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:53:48,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 314 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:48,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:48,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:53:48,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:49,325 INFO L124 PetriNetUnfolderBase]: 1555/2361 cut-off events. [2024-06-03 19:53:49,325 INFO L125 PetriNetUnfolderBase]: For 11276/11276 co-relation queries the response was YES. [2024-06-03 19:53:49,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9235 conditions, 2361 events. 1555/2361 cut-off events. For 11276/11276 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11158 event pairs, 576 based on Foata normal form. 4/2362 useless extension candidates. Maximal degree in co-relation 9210. Up to 2248 conditions per place. [2024-06-03 19:53:49,356 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 67 selfloop transitions, 17 changer transitions 0/89 dead transitions. [2024-06-03 19:53:49,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 89 transitions, 588 flow [2024-06-03 19:53:49,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:53:49,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:53:49,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-03 19:53:49,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-03 19:53:49,358 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 314 flow. Second operand 7 states and 124 transitions. [2024-06-03 19:53:49,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 89 transitions, 588 flow [2024-06-03 19:53:49,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 89 transitions, 548 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-03 19:53:49,362 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 368 flow [2024-06-03 19:53:49,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=368, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-06-03 19:53:49,363 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 22 predicate places. [2024-06-03 19:53:49,363 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 368 flow [2024-06-03 19:53:49,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:49,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:49,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:49,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:53:49,364 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)] === [2024-06-03 19:53:49,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:49,364 INFO L85 PathProgramCache]: Analyzing trace with hash -414308612, now seen corresponding path program 2 times [2024-06-03 19:53:49,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:49,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183387362] [2024-06-03 19:53:49,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:49,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:49,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:50,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:50,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:50,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183387362] [2024-06-03 19:53:50,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183387362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:50,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:50,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:53:50,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429352328] [2024-06-03 19:53:50,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:50,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:53:50,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:50,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:53:50,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:53:50,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:53:50,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 368 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:50,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:50,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:53:50,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:50,633 INFO L124 PetriNetUnfolderBase]: 1669/2527 cut-off events. [2024-06-03 19:53:50,633 INFO L125 PetriNetUnfolderBase]: For 15374/15374 co-relation queries the response was YES. [2024-06-03 19:53:50,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10817 conditions, 2527 events. 1669/2527 cut-off events. For 15374/15374 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11965 event pairs, 557 based on Foata normal form. 8/2532 useless extension candidates. Maximal degree in co-relation 10790. Up to 2297 conditions per place. [2024-06-03 19:53:50,645 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 69 selfloop transitions, 24 changer transitions 0/98 dead transitions. [2024-06-03 19:53:50,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 98 transitions, 746 flow [2024-06-03 19:53:50,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:53:50,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:53:50,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-03 19:53:50,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445993031358885 [2024-06-03 19:53:50,646 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 368 flow. Second operand 7 states and 128 transitions. [2024-06-03 19:53:50,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 98 transitions, 746 flow [2024-06-03 19:53:50,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 98 transitions, 704 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-03 19:53:50,652 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 484 flow [2024-06-03 19:53:50,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=484, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2024-06-03 19:53:50,653 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2024-06-03 19:53:50,653 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 484 flow [2024-06-03 19:53:50,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:50,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:50,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:50,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:53:50,654 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)] === [2024-06-03 19:53:50,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:50,654 INFO L85 PathProgramCache]: Analyzing trace with hash 33568348, now seen corresponding path program 3 times [2024-06-03 19:53:50,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:50,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859146261] [2024-06-03 19:53:50,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:50,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:50,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:51,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:51,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:51,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859146261] [2024-06-03 19:53:51,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859146261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:51,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:51,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:53:51,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918102733] [2024-06-03 19:53:51,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:51,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:53:51,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:51,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:53:51,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:53:51,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:53:51,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 484 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:51,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:51,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:53:51,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:51,833 INFO L124 PetriNetUnfolderBase]: 1687/2559 cut-off events. [2024-06-03 19:53:51,833 INFO L125 PetriNetUnfolderBase]: For 19985/20000 co-relation queries the response was YES. [2024-06-03 19:53:51,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11917 conditions, 2559 events. 1687/2559 cut-off events. For 19985/20000 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12207 event pairs, 521 based on Foata normal form. 14/2566 useless extension candidates. Maximal degree in co-relation 11888. Up to 2208 conditions per place. [2024-06-03 19:53:51,852 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 64 selfloop transitions, 37 changer transitions 0/106 dead transitions. [2024-06-03 19:53:51,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 106 transitions, 940 flow [2024-06-03 19:53:51,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:53:51,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:53:51,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-03 19:53:51,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-03 19:53:51,853 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 484 flow. Second operand 7 states and 132 transitions. [2024-06-03 19:53:51,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 106 transitions, 940 flow [2024-06-03 19:53:51,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 106 transitions, 894 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-03 19:53:51,867 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 636 flow [2024-06-03 19:53:51,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=636, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2024-06-03 19:53:51,867 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-03 19:53:51,868 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 636 flow [2024-06-03 19:53:51,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:51,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:51,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:51,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:53:51,868 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)] === [2024-06-03 19:53:51,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:51,869 INFO L85 PathProgramCache]: Analyzing trace with hash 33814612, now seen corresponding path program 1 times [2024-06-03 19:53:51,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:51,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5561942] [2024-06-03 19:53:51,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:51,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:52,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:52,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:52,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5561942] [2024-06-03 19:53:52,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5561942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:52,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:52,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:53:52,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926358934] [2024-06-03 19:53:52,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:52,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:53:52,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:52,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:53:52,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:53:52,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:53:52,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 636 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:52,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:52,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:53:52,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:53,341 INFO L124 PetriNetUnfolderBase]: 1573/2453 cut-off events. [2024-06-03 19:53:53,341 INFO L125 PetriNetUnfolderBase]: For 20150/20150 co-relation queries the response was YES. [2024-06-03 19:53:53,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11733 conditions, 2453 events. 1573/2453 cut-off events. For 20150/20150 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11731 event pairs, 480 based on Foata normal form. 4/2454 useless extension candidates. Maximal degree in co-relation 11701. Up to 2302 conditions per place. [2024-06-03 19:53:53,355 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 85 selfloop transitions, 16 changer transitions 0/105 dead transitions. [2024-06-03 19:53:53,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 105 transitions, 930 flow [2024-06-03 19:53:53,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:53:53,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:53:53,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-03 19:53:53,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-03 19:53:53,357 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 636 flow. Second operand 8 states and 131 transitions. [2024-06-03 19:53:53,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 105 transitions, 930 flow [2024-06-03 19:53:53,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 105 transitions, 826 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-03 19:53:53,375 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 607 flow [2024-06-03 19:53:53,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=607, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2024-06-03 19:53:53,376 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2024-06-03 19:53:53,376 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 607 flow [2024-06-03 19:53:53,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:53,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:53,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:53,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:53:53,377 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:53:53,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:53,377 INFO L85 PathProgramCache]: Analyzing trace with hash -295611301, now seen corresponding path program 1 times [2024-06-03 19:53:53,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:53,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498546780] [2024-06-03 19:53:53,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:53,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:53,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:54,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:54,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:54,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498546780] [2024-06-03 19:53:54,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498546780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:54,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:54,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:53:54,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70160693] [2024-06-03 19:53:54,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:54,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:53:54,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:54,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:53:54,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:53:54,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:53:54,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 607 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:54,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:54,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:53:54,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:54,486 INFO L124 PetriNetUnfolderBase]: 1567/2445 cut-off events. [2024-06-03 19:53:54,487 INFO L125 PetriNetUnfolderBase]: For 20150/20150 co-relation queries the response was YES. [2024-06-03 19:53:54,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11367 conditions, 2445 events. 1567/2445 cut-off events. For 20150/20150 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11633 event pairs, 490 based on Foata normal form. 2/2444 useless extension candidates. Maximal degree in co-relation 11334. Up to 2333 conditions per place. [2024-06-03 19:53:54,500 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 81 selfloop transitions, 8 changer transitions 0/93 dead transitions. [2024-06-03 19:53:54,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 93 transitions, 829 flow [2024-06-03 19:53:54,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:53:54,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:53:54,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-06-03 19:53:54,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40487804878048783 [2024-06-03 19:53:54,502 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 607 flow. Second operand 5 states and 83 transitions. [2024-06-03 19:53:54,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 93 transitions, 829 flow [2024-06-03 19:53:54,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 93 transitions, 774 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 19:53:54,515 INFO L231 Difference]: Finished difference. Result has 77 places, 84 transitions, 602 flow [2024-06-03 19:53:54,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=602, PETRI_PLACES=77, PETRI_TRANSITIONS=84} [2024-06-03 19:53:54,515 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 35 predicate places. [2024-06-03 19:53:54,516 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 84 transitions, 602 flow [2024-06-03 19:53:54,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:54,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:54,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:54,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:53:54,516 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)] === [2024-06-03 19:53:54,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:54,517 INFO L85 PathProgramCache]: Analyzing trace with hash -159299651, now seen corresponding path program 1 times [2024-06-03 19:53:54,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:54,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165698583] [2024-06-03 19:53:54,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:54,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:55,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:55,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:55,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165698583] [2024-06-03 19:53:55,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165698583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:55,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:55,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:53:55,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938162121] [2024-06-03 19:53:55,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:55,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:53:55,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:55,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:53:55,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:53:55,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:53:55,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 84 transitions, 602 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:55,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:55,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:53:55,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:56,025 INFO L124 PetriNetUnfolderBase]: 1665/2524 cut-off events. [2024-06-03 19:53:56,026 INFO L125 PetriNetUnfolderBase]: For 26069/26069 co-relation queries the response was YES. [2024-06-03 19:53:56,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12772 conditions, 2524 events. 1665/2524 cut-off events. For 26069/26069 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11990 event pairs, 507 based on Foata normal form. 2/2523 useless extension candidates. Maximal degree in co-relation 12738. Up to 2402 conditions per place. [2024-06-03 19:53:56,042 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 89 selfloop transitions, 19 changer transitions 0/113 dead transitions. [2024-06-03 19:53:56,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 113 transitions, 932 flow [2024-06-03 19:53:56,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:53:56,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:53:56,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-03 19:53:56,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-03 19:53:56,044 INFO L175 Difference]: Start difference. First operand has 77 places, 84 transitions, 602 flow. Second operand 7 states and 124 transitions. [2024-06-03 19:53:56,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 113 transitions, 932 flow [2024-06-03 19:53:56,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 113 transitions, 904 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-03 19:53:56,086 INFO L231 Difference]: Finished difference. Result has 81 places, 87 transitions, 676 flow [2024-06-03 19:53:56,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=676, PETRI_PLACES=81, PETRI_TRANSITIONS=87} [2024-06-03 19:53:56,088 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-03 19:53:56,088 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 87 transitions, 676 flow [2024-06-03 19:53:56,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:56,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:56,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:56,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:53:56,089 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)] === [2024-06-03 19:53:56,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:56,089 INFO L85 PathProgramCache]: Analyzing trace with hash -155484419, now seen corresponding path program 1 times [2024-06-03 19:53:56,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:56,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371032653] [2024-06-03 19:53:56,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:56,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:56,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:56,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:56,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:56,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371032653] [2024-06-03 19:53:56,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371032653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:56,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:56,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:53:56,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452491194] [2024-06-03 19:53:56,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:56,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:53:56,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:56,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:53:56,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:53:57,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:53:57,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 87 transitions, 676 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:57,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:57,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:53:57,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:57,456 INFO L124 PetriNetUnfolderBase]: 1795/2677 cut-off events. [2024-06-03 19:53:57,456 INFO L125 PetriNetUnfolderBase]: For 28844/28844 co-relation queries the response was YES. [2024-06-03 19:53:57,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13424 conditions, 2677 events. 1795/2677 cut-off events. For 28844/28844 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12122 event pairs, 542 based on Foata normal form. 2/2676 useless extension candidates. Maximal degree in co-relation 13389. Up to 2622 conditions per place. [2024-06-03 19:53:57,474 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 98 selfloop transitions, 17 changer transitions 0/118 dead transitions. [2024-06-03 19:53:57,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 118 transitions, 1023 flow [2024-06-03 19:53:57,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:53:57,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:53:57,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-03 19:53:57,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-03 19:53:57,475 INFO L175 Difference]: Start difference. First operand has 81 places, 87 transitions, 676 flow. Second operand 8 states and 127 transitions. [2024-06-03 19:53:57,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 118 transitions, 1023 flow [2024-06-03 19:53:57,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 118 transitions, 965 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-03 19:53:57,495 INFO L231 Difference]: Finished difference. Result has 85 places, 92 transitions, 721 flow [2024-06-03 19:53:57,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=721, PETRI_PLACES=85, PETRI_TRANSITIONS=92} [2024-06-03 19:53:57,497 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-03 19:53:57,497 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 92 transitions, 721 flow [2024-06-03 19:53:57,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:57,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:57,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:57,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:53:57,498 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:53:57,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:57,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1537274165, now seen corresponding path program 2 times [2024-06-03 19:53:57,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:57,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770868660] [2024-06-03 19:53:57,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:57,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:57,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:58,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:58,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:58,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770868660] [2024-06-03 19:53:58,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770868660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:58,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:58,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:53:58,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126498594] [2024-06-03 19:53:58,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:58,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:53:58,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:58,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:53:58,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:53:58,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:53:58,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 92 transitions, 721 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:58,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:58,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:53:58,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:58,880 INFO L124 PetriNetUnfolderBase]: 1861/2777 cut-off events. [2024-06-03 19:53:58,880 INFO L125 PetriNetUnfolderBase]: For 33073/33088 co-relation queries the response was YES. [2024-06-03 19:53:58,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14181 conditions, 2777 events. 1861/2777 cut-off events. For 33073/33088 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12629 event pairs, 516 based on Foata normal form. 12/2782 useless extension candidates. Maximal degree in co-relation 14144. Up to 2451 conditions per place. [2024-06-03 19:53:58,894 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 89 selfloop transitions, 43 changer transitions 0/135 dead transitions. [2024-06-03 19:53:58,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 135 transitions, 1177 flow [2024-06-03 19:53:58,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:53:58,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:53:58,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 19:53:58,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-03 19:53:58,895 INFO L175 Difference]: Start difference. First operand has 85 places, 92 transitions, 721 flow. Second operand 8 states and 138 transitions. [2024-06-03 19:53:58,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 135 transitions, 1177 flow [2024-06-03 19:53:58,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 135 transitions, 1119 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 19:53:58,910 INFO L231 Difference]: Finished difference. Result has 90 places, 106 transitions, 910 flow [2024-06-03 19:53:58,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=910, PETRI_PLACES=90, PETRI_TRANSITIONS=106} [2024-06-03 19:53:58,911 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-03 19:53:58,911 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 106 transitions, 910 flow [2024-06-03 19:53:58,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:58,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:58,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:58,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:53:58,912 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)] === [2024-06-03 19:53:58,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:58,912 INFO L85 PathProgramCache]: Analyzing trace with hash 185441313, now seen corresponding path program 3 times [2024-06-03 19:53:58,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:58,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474367077] [2024-06-03 19:53:58,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:58,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:59,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:59,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:59,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474367077] [2024-06-03 19:53:59,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474367077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:59,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:59,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:53:59,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278677229] [2024-06-03 19:53:59,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:59,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:53:59,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:59,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:53:59,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:54:00,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:54:00,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 106 transitions, 910 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:00,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:00,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:54:00,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:00,605 INFO L124 PetriNetUnfolderBase]: 1872/2791 cut-off events. [2024-06-03 19:54:00,605 INFO L125 PetriNetUnfolderBase]: For 36936/36951 co-relation queries the response was YES. [2024-06-03 19:54:00,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15037 conditions, 2791 events. 1872/2791 cut-off events. For 36936/36951 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12712 event pairs, 544 based on Foata normal form. 12/2798 useless extension candidates. Maximal degree in co-relation 14997. Up to 2651 conditions per place. [2024-06-03 19:54:00,622 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 98 selfloop transitions, 40 changer transitions 0/141 dead transitions. [2024-06-03 19:54:00,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 141 transitions, 1455 flow [2024-06-03 19:54:00,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:54:00,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:54:00,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-03 19:54:00,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-03 19:54:00,624 INFO L175 Difference]: Start difference. First operand has 90 places, 106 transitions, 910 flow. Second operand 8 states and 130 transitions. [2024-06-03 19:54:00,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 141 transitions, 1455 flow [2024-06-03 19:54:00,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 141 transitions, 1385 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-03 19:54:00,646 INFO L231 Difference]: Finished difference. Result has 98 places, 116 transitions, 1109 flow [2024-06-03 19:54:00,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=864, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1109, PETRI_PLACES=98, PETRI_TRANSITIONS=116} [2024-06-03 19:54:00,647 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-03 19:54:00,647 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 116 transitions, 1109 flow [2024-06-03 19:54:00,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:00,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:00,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:00,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:54:00,648 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)] === [2024-06-03 19:54:00,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:00,648 INFO L85 PathProgramCache]: Analyzing trace with hash -810108461, now seen corresponding path program 4 times [2024-06-03 19:54:00,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:00,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251118570] [2024-06-03 19:54:00,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:00,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:00,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:01,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:01,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:01,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251118570] [2024-06-03 19:54:01,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251118570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:01,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:01,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:54:01,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804378889] [2024-06-03 19:54:01,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:01,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:54:01,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:01,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:54:01,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:54:01,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:54:01,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 116 transitions, 1109 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:01,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:01,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:54:01,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:02,026 INFO L124 PetriNetUnfolderBase]: 1861/2774 cut-off events. [2024-06-03 19:54:02,027 INFO L125 PetriNetUnfolderBase]: For 39918/39933 co-relation queries the response was YES. [2024-06-03 19:54:02,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15306 conditions, 2774 events. 1861/2774 cut-off events. For 39918/39933 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12614 event pairs, 544 based on Foata normal form. 12/2781 useless extension candidates. Maximal degree in co-relation 15262. Up to 2672 conditions per place. [2024-06-03 19:54:02,043 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 107 selfloop transitions, 30 changer transitions 0/140 dead transitions. [2024-06-03 19:54:02,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 140 transitions, 1451 flow [2024-06-03 19:54:02,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:54:02,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:54:02,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-03 19:54:02,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-03 19:54:02,046 INFO L175 Difference]: Start difference. First operand has 98 places, 116 transitions, 1109 flow. Second operand 8 states and 127 transitions. [2024-06-03 19:54:02,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 140 transitions, 1451 flow [2024-06-03 19:54:02,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 140 transitions, 1389 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-03 19:54:02,074 INFO L231 Difference]: Finished difference. Result has 104 places, 117 transitions, 1125 flow [2024-06-03 19:54:02,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1047, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1125, PETRI_PLACES=104, PETRI_TRANSITIONS=117} [2024-06-03 19:54:02,074 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-03 19:54:02,074 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 117 transitions, 1125 flow [2024-06-03 19:54:02,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:02,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:02,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:02,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:54:02,077 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)] === [2024-06-03 19:54:02,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:02,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1324373511, now seen corresponding path program 1 times [2024-06-03 19:54:02,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:02,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202750604] [2024-06-03 19:54:02,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:02,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:02,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:03,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:03,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:03,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202750604] [2024-06-03 19:54:03,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202750604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:03,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:03,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:54:03,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842601501] [2024-06-03 19:54:03,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:03,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:54:03,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:03,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:54:03,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:54:03,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:54:03,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 117 transitions, 1125 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:03,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:03,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:54:03,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:03,758 INFO L124 PetriNetUnfolderBase]: 1825/2785 cut-off events. [2024-06-03 19:54:03,759 INFO L125 PetriNetUnfolderBase]: For 44601/44610 co-relation queries the response was YES. [2024-06-03 19:54:03,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15786 conditions, 2785 events. 1825/2785 cut-off events. For 44601/44610 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 13445 event pairs, 496 based on Foata normal form. 8/2773 useless extension candidates. Maximal degree in co-relation 15740. Up to 2574 conditions per place. [2024-06-03 19:54:03,776 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 132 selfloop transitions, 31 changer transitions 0/171 dead transitions. [2024-06-03 19:54:03,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 171 transitions, 1737 flow [2024-06-03 19:54:03,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:54:03,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:54:03,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 19:54:03,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-03 19:54:03,778 INFO L175 Difference]: Start difference. First operand has 104 places, 117 transitions, 1125 flow. Second operand 9 states and 157 transitions. [2024-06-03 19:54:03,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 171 transitions, 1737 flow [2024-06-03 19:54:03,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 171 transitions, 1667 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-03 19:54:03,819 INFO L231 Difference]: Finished difference. Result has 111 places, 136 transitions, 1349 flow [2024-06-03 19:54:03,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1061, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1349, PETRI_PLACES=111, PETRI_TRANSITIONS=136} [2024-06-03 19:54:03,820 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-03 19:54:03,820 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 136 transitions, 1349 flow [2024-06-03 19:54:03,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:03,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:03,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:03,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:54:03,821 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)] === [2024-06-03 19:54:03,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:03,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1163255577, now seen corresponding path program 2 times [2024-06-03 19:54:03,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:03,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068029847] [2024-06-03 19:54:03,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:03,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:04,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:04,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:04,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068029847] [2024-06-03 19:54:04,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068029847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:04,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:04,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:54:04,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330815169] [2024-06-03 19:54:04,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:04,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:54:04,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:04,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:54:04,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:54:04,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:54:04,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 136 transitions, 1349 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:04,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:04,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:54:04,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:05,515 INFO L124 PetriNetUnfolderBase]: 1867/2851 cut-off events. [2024-06-03 19:54:05,515 INFO L125 PetriNetUnfolderBase]: For 51689/51702 co-relation queries the response was YES. [2024-06-03 19:54:05,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16912 conditions, 2851 events. 1867/2851 cut-off events. For 51689/51702 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13863 event pairs, 379 based on Foata normal form. 12/2843 useless extension candidates. Maximal degree in co-relation 16862. Up to 2581 conditions per place. [2024-06-03 19:54:05,534 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 127 selfloop transitions, 34 changer transitions 0/169 dead transitions. [2024-06-03 19:54:05,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 169 transitions, 1813 flow [2024-06-03 19:54:05,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:54:05,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:54:05,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 19:54:05,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-03 19:54:05,537 INFO L175 Difference]: Start difference. First operand has 111 places, 136 transitions, 1349 flow. Second operand 8 states and 138 transitions. [2024-06-03 19:54:05,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 169 transitions, 1813 flow [2024-06-03 19:54:05,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 169 transitions, 1747 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-03 19:54:05,598 INFO L231 Difference]: Finished difference. Result has 116 places, 138 transitions, 1409 flow [2024-06-03 19:54:05,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1283, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1409, PETRI_PLACES=116, PETRI_TRANSITIONS=138} [2024-06-03 19:54:05,606 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-03 19:54:05,606 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 138 transitions, 1409 flow [2024-06-03 19:54:05,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:05,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:05,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:05,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:54:05,607 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)] === [2024-06-03 19:54:05,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:05,607 INFO L85 PathProgramCache]: Analyzing trace with hash -643321189, now seen corresponding path program 3 times [2024-06-03 19:54:05,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:05,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772841310] [2024-06-03 19:54:05,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:05,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:05,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:06,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:06,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772841310] [2024-06-03 19:54:06,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772841310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:06,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:06,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:54:06,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721637818] [2024-06-03 19:54:06,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:06,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:54:06,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:06,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:54:06,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:54:06,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:54:06,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 138 transitions, 1409 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:06,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:06,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:54:06,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:07,176 INFO L124 PetriNetUnfolderBase]: 1884/2878 cut-off events. [2024-06-03 19:54:07,176 INFO L125 PetriNetUnfolderBase]: For 57983/57996 co-relation queries the response was YES. [2024-06-03 19:54:07,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17538 conditions, 2878 events. 1884/2878 cut-off events. For 57983/57996 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 14012 event pairs, 485 based on Foata normal form. 12/2875 useless extension candidates. Maximal degree in co-relation 17487. Up to 2642 conditions per place. [2024-06-03 19:54:07,197 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 129 selfloop transitions, 34 changer transitions 0/171 dead transitions. [2024-06-03 19:54:07,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 171 transitions, 1883 flow [2024-06-03 19:54:07,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:54:07,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:54:07,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 19:54:07,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-03 19:54:07,199 INFO L175 Difference]: Start difference. First operand has 116 places, 138 transitions, 1409 flow. Second operand 8 states and 139 transitions. [2024-06-03 19:54:07,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 171 transitions, 1883 flow [2024-06-03 19:54:07,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 171 transitions, 1773 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-03 19:54:07,256 INFO L231 Difference]: Finished difference. Result has 118 places, 140 transitions, 1427 flow [2024-06-03 19:54:07,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1303, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1427, PETRI_PLACES=118, PETRI_TRANSITIONS=140} [2024-06-03 19:54:07,256 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-03 19:54:07,256 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 140 transitions, 1427 flow [2024-06-03 19:54:07,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:07,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:07,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:07,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:54:07,257 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)] === [2024-06-03 19:54:07,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:07,257 INFO L85 PathProgramCache]: Analyzing trace with hash 306580783, now seen corresponding path program 1 times [2024-06-03 19:54:07,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:07,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130823524] [2024-06-03 19:54:07,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:07,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:07,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:08,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:08,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130823524] [2024-06-03 19:54:08,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130823524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:08,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:08,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:54:08,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139238138] [2024-06-03 19:54:08,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:08,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:54:08,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:08,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:54:08,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:54:08,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:54:08,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 140 transitions, 1427 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:08,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:08,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:54:08,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:08,827 INFO L124 PetriNetUnfolderBase]: 2031/3048 cut-off events. [2024-06-03 19:54:08,827 INFO L125 PetriNetUnfolderBase]: For 56425/56431 co-relation queries the response was YES. [2024-06-03 19:54:08,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17691 conditions, 3048 events. 2031/3048 cut-off events. For 56425/56431 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 14168 event pairs, 483 based on Foata normal form. 10/3055 useless extension candidates. Maximal degree in co-relation 17639. Up to 2744 conditions per place. [2024-06-03 19:54:08,846 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 122 selfloop transitions, 50 changer transitions 0/175 dead transitions. [2024-06-03 19:54:08,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 175 transitions, 1941 flow [2024-06-03 19:54:08,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:54:08,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:54:08,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-03 19:54:08,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-03 19:54:08,847 INFO L175 Difference]: Start difference. First operand has 118 places, 140 transitions, 1427 flow. Second operand 8 states and 135 transitions. [2024-06-03 19:54:08,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 175 transitions, 1941 flow [2024-06-03 19:54:08,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 175 transitions, 1813 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-03 19:54:08,908 INFO L231 Difference]: Finished difference. Result has 121 places, 147 transitions, 1514 flow [2024-06-03 19:54:08,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1305, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1514, PETRI_PLACES=121, PETRI_TRANSITIONS=147} [2024-06-03 19:54:08,908 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-03 19:54:08,908 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 147 transitions, 1514 flow [2024-06-03 19:54:08,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:08,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:08,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:08,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:54:08,909 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:54:08,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:08,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1281403707, now seen corresponding path program 4 times [2024-06-03 19:54:08,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:08,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644762271] [2024-06-03 19:54:08,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:08,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:08,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:09,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:09,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:09,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644762271] [2024-06-03 19:54:09,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644762271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:09,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:09,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:54:09,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690953576] [2024-06-03 19:54:09,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:09,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:54:09,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:09,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:54:09,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:54:09,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:54:09,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 147 transitions, 1514 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:09,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:09,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:54:09,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:10,548 INFO L124 PetriNetUnfolderBase]: 1980/3052 cut-off events. [2024-06-03 19:54:10,549 INFO L125 PetriNetUnfolderBase]: For 68839/68855 co-relation queries the response was YES. [2024-06-03 19:54:10,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18249 conditions, 3052 events. 1980/3052 cut-off events. For 68839/68855 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15146 event pairs, 448 based on Foata normal form. 39/3081 useless extension candidates. Maximal degree in co-relation 18195. Up to 2560 conditions per place. [2024-06-03 19:54:10,571 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 120 selfloop transitions, 52 changer transitions 0/181 dead transitions. [2024-06-03 19:54:10,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 181 transitions, 2012 flow [2024-06-03 19:54:10,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:54:10,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:54:10,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 19:54:10,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-03 19:54:10,573 INFO L175 Difference]: Start difference. First operand has 121 places, 147 transitions, 1514 flow. Second operand 8 states and 145 transitions. [2024-06-03 19:54:10,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 181 transitions, 2012 flow [2024-06-03 19:54:10,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 181 transitions, 1873 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-03 19:54:10,642 INFO L231 Difference]: Finished difference. Result has 123 places, 149 transitions, 1541 flow [2024-06-03 19:54:10,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1375, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1541, PETRI_PLACES=123, PETRI_TRANSITIONS=149} [2024-06-03 19:54:10,642 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-03 19:54:10,643 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 149 transitions, 1541 flow [2024-06-03 19:54:10,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:10,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:10,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:10,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:54:10,643 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)] === [2024-06-03 19:54:10,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:10,644 INFO L85 PathProgramCache]: Analyzing trace with hash 145162175, now seen corresponding path program 1 times [2024-06-03 19:54:10,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:10,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474708197] [2024-06-03 19:54:10,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:10,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:10,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:11,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:11,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:11,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474708197] [2024-06-03 19:54:11,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474708197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:11,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:11,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:54:11,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487431848] [2024-06-03 19:54:11,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:11,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:54:11,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:11,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:54:11,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:54:11,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:54:11,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 149 transitions, 1541 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:11,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:11,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:54:11,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:12,226 INFO L124 PetriNetUnfolderBase]: 2157/3252 cut-off events. [2024-06-03 19:54:12,226 INFO L125 PetriNetUnfolderBase]: For 64929/64937 co-relation queries the response was YES. [2024-06-03 19:54:12,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19110 conditions, 3252 events. 2157/3252 cut-off events. For 64929/64937 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15489 event pairs, 501 based on Foata normal form. 12/3261 useless extension candidates. Maximal degree in co-relation 19055. Up to 3163 conditions per place. [2024-06-03 19:54:12,248 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 158 selfloop transitions, 22 changer transitions 0/183 dead transitions. [2024-06-03 19:54:12,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 183 transitions, 2045 flow [2024-06-03 19:54:12,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:54:12,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:54:12,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-03 19:54:12,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-03 19:54:12,266 INFO L175 Difference]: Start difference. First operand has 123 places, 149 transitions, 1541 flow. Second operand 9 states and 141 transitions. [2024-06-03 19:54:12,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 183 transitions, 2045 flow [2024-06-03 19:54:12,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 183 transitions, 1913 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-03 19:54:12,342 INFO L231 Difference]: Finished difference. Result has 126 places, 151 transitions, 1506 flow [2024-06-03 19:54:12,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1506, PETRI_PLACES=126, PETRI_TRANSITIONS=151} [2024-06-03 19:54:12,343 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 84 predicate places. [2024-06-03 19:54:12,343 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 151 transitions, 1506 flow [2024-06-03 19:54:12,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:12,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:12,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:12,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:54:12,343 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:54:12,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:12,344 INFO L85 PathProgramCache]: Analyzing trace with hash 105370600, now seen corresponding path program 1 times [2024-06-03 19:54:12,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:12,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419996604] [2024-06-03 19:54:12,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:12,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:12,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:12,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:12,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419996604] [2024-06-03 19:54:12,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419996604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:12,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:12,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:54:12,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806708779] [2024-06-03 19:54:12,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:12,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:54:12,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:12,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:54:12,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:54:13,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:54:13,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 151 transitions, 1506 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:13,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:13,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:54:13,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:13,570 INFO L124 PetriNetUnfolderBase]: 2162/3259 cut-off events. [2024-06-03 19:54:13,570 INFO L125 PetriNetUnfolderBase]: For 66289/66297 co-relation queries the response was YES. [2024-06-03 19:54:13,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19059 conditions, 3259 events. 2162/3259 cut-off events. For 66289/66297 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15450 event pairs, 503 based on Foata normal form. 9/3265 useless extension candidates. Maximal degree in co-relation 19003. Up to 3208 conditions per place. [2024-06-03 19:54:13,596 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 155 selfloop transitions, 19 changer transitions 0/177 dead transitions. [2024-06-03 19:54:13,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 177 transitions, 2020 flow [2024-06-03 19:54:13,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:54:13,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:54:13,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-03 19:54:13,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-03 19:54:13,598 INFO L175 Difference]: Start difference. First operand has 126 places, 151 transitions, 1506 flow. Second operand 6 states and 98 transitions. [2024-06-03 19:54:13,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 177 transitions, 2020 flow [2024-06-03 19:54:13,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 177 transitions, 1941 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-03 19:54:13,693 INFO L231 Difference]: Finished difference. Result has 126 places, 160 transitions, 1554 flow [2024-06-03 19:54:13,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1427, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1554, PETRI_PLACES=126, PETRI_TRANSITIONS=160} [2024-06-03 19:54:13,694 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 84 predicate places. [2024-06-03 19:54:13,694 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 160 transitions, 1554 flow [2024-06-03 19:54:13,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:13,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:13,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:13,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 19:54:13,694 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)] === [2024-06-03 19:54:13,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:13,695 INFO L85 PathProgramCache]: Analyzing trace with hash 664716577, now seen corresponding path program 2 times [2024-06-03 19:54:13,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:13,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847992586] [2024-06-03 19:54:13,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:13,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:14,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:14,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:14,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847992586] [2024-06-03 19:54:14,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847992586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:14,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:14,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:54:14,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434887755] [2024-06-03 19:54:14,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:14,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:54:14,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:14,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:54:14,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:54:14,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:54:14,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 160 transitions, 1554 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:14,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:14,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:54:14,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:15,222 INFO L124 PetriNetUnfolderBase]: 2179/3291 cut-off events. [2024-06-03 19:54:15,222 INFO L125 PetriNetUnfolderBase]: For 73247/73274 co-relation queries the response was YES. [2024-06-03 19:54:15,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19633 conditions, 3291 events. 2179/3291 cut-off events. For 73247/73274 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15648 event pairs, 503 based on Foata normal form. 17/3294 useless extension candidates. Maximal degree in co-relation 19575. Up to 2769 conditions per place. [2024-06-03 19:54:15,247 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 106 selfloop transitions, 88 changer transitions 0/197 dead transitions. [2024-06-03 19:54:15,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 197 transitions, 2194 flow [2024-06-03 19:54:15,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:54:15,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:54:15,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-03 19:54:15,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-03 19:54:15,249 INFO L175 Difference]: Start difference. First operand has 126 places, 160 transitions, 1554 flow. Second operand 9 states and 152 transitions. [2024-06-03 19:54:15,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 197 transitions, 2194 flow [2024-06-03 19:54:15,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 197 transitions, 2166 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-06-03 19:54:15,307 INFO L231 Difference]: Finished difference. Result has 134 places, 164 transitions, 1777 flow [2024-06-03 19:54:15,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1526, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1777, PETRI_PLACES=134, PETRI_TRANSITIONS=164} [2024-06-03 19:54:15,308 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-03 19:54:15,308 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 164 transitions, 1777 flow [2024-06-03 19:54:15,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:15,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:15,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:15,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 19:54:15,309 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)] === [2024-06-03 19:54:15,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:15,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1863877901, now seen corresponding path program 3 times [2024-06-03 19:54:15,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:15,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564130558] [2024-06-03 19:54:15,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:15,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:15,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:16,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:16,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:16,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564130558] [2024-06-03 19:54:16,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564130558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:16,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:16,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:54:16,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741812304] [2024-06-03 19:54:16,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:16,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:54:16,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:16,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:54:16,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:54:16,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:54:16,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 164 transitions, 1777 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:16,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:16,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:54:16,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:17,024 INFO L124 PetriNetUnfolderBase]: 2196/3315 cut-off events. [2024-06-03 19:54:17,024 INFO L125 PetriNetUnfolderBase]: For 80584/80614 co-relation queries the response was YES. [2024-06-03 19:54:17,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20613 conditions, 3315 events. 2196/3315 cut-off events. For 80584/80614 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15839 event pairs, 472 based on Foata normal form. 24/3332 useless extension candidates. Maximal degree in co-relation 20552. Up to 3055 conditions per place. [2024-06-03 19:54:17,051 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 145 selfloop transitions, 53 changer transitions 0/201 dead transitions. [2024-06-03 19:54:17,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 201 transitions, 2471 flow [2024-06-03 19:54:17,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:54:17,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:54:17,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-03 19:54:17,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-03 19:54:17,053 INFO L175 Difference]: Start difference. First operand has 134 places, 164 transitions, 1777 flow. Second operand 9 states and 145 transitions. [2024-06-03 19:54:17,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 201 transitions, 2471 flow [2024-06-03 19:54:17,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 201 transitions, 2337 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-03 19:54:17,147 INFO L231 Difference]: Finished difference. Result has 139 places, 168 transitions, 1864 flow [2024-06-03 19:54:17,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1643, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1864, PETRI_PLACES=139, PETRI_TRANSITIONS=168} [2024-06-03 19:54:17,147 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2024-06-03 19:54:17,148 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 168 transitions, 1864 flow [2024-06-03 19:54:17,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:17,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:17,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:17,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 19:54:17,148 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:54:17,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:17,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1872448781, now seen corresponding path program 4 times [2024-06-03 19:54:17,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:17,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782161803] [2024-06-03 19:54:17,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:17,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:17,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:17,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:17,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:17,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782161803] [2024-06-03 19:54:17,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782161803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:17,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:17,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:54:17,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111770918] [2024-06-03 19:54:17,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:17,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:54:17,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:17,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:54:17,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:54:18,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:54:18,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 168 transitions, 1864 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:18,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:18,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:54:18,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:18,844 INFO L124 PetriNetUnfolderBase]: 2278/3456 cut-off events. [2024-06-03 19:54:18,844 INFO L125 PetriNetUnfolderBase]: For 95475/95502 co-relation queries the response was YES. [2024-06-03 19:54:18,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21536 conditions, 3456 events. 2278/3456 cut-off events. For 95475/95502 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 16720 event pairs, 513 based on Foata normal form. 41/3483 useless extension candidates. Maximal degree in co-relation 21474. Up to 2917 conditions per place. [2024-06-03 19:54:18,868 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 132 selfloop transitions, 72 changer transitions 0/207 dead transitions. [2024-06-03 19:54:18,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 207 transitions, 2484 flow [2024-06-03 19:54:18,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:54:18,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:54:18,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 19:54:18,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-03 19:54:18,870 INFO L175 Difference]: Start difference. First operand has 139 places, 168 transitions, 1864 flow. Second operand 9 states and 157 transitions. [2024-06-03 19:54:18,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 207 transitions, 2484 flow [2024-06-03 19:54:18,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 207 transitions, 2342 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-03 19:54:18,974 INFO L231 Difference]: Finished difference. Result has 144 places, 171 transitions, 1986 flow [2024-06-03 19:54:18,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1730, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1986, PETRI_PLACES=144, PETRI_TRANSITIONS=171} [2024-06-03 19:54:18,975 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-03 19:54:18,975 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 171 transitions, 1986 flow [2024-06-03 19:54:18,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:18,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:18,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:18,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 19:54:18,975 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)] === [2024-06-03 19:54:18,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:18,976 INFO L85 PathProgramCache]: Analyzing trace with hash 428356519, now seen corresponding path program 5 times [2024-06-03 19:54:18,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:18,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128067869] [2024-06-03 19:54:18,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:18,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:19,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:19,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128067869] [2024-06-03 19:54:19,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128067869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:19,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:19,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:54:19,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184592336] [2024-06-03 19:54:19,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:19,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:54:19,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:19,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:54:19,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:54:19,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:54:19,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 171 transitions, 1986 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:19,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:19,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:54:19,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:20,464 INFO L124 PetriNetUnfolderBase]: 2189/3399 cut-off events. [2024-06-03 19:54:20,464 INFO L125 PetriNetUnfolderBase]: For 109180/109217 co-relation queries the response was YES. [2024-06-03 19:54:20,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21909 conditions, 3399 events. 2189/3399 cut-off events. For 109180/109217 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 17275 event pairs, 469 based on Foata normal form. 41/3412 useless extension candidates. Maximal degree in co-relation 21844. Up to 2708 conditions per place. [2024-06-03 19:54:20,491 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 109 selfloop transitions, 86 changer transitions 0/204 dead transitions. [2024-06-03 19:54:20,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 204 transitions, 2540 flow [2024-06-03 19:54:20,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:54:20,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:54:20,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 19:54:20,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-03 19:54:20,493 INFO L175 Difference]: Start difference. First operand has 144 places, 171 transitions, 1986 flow. Second operand 8 states and 147 transitions. [2024-06-03 19:54:20,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 204 transitions, 2540 flow [2024-06-03 19:54:20,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 204 transitions, 2260 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-06-03 19:54:20,579 INFO L231 Difference]: Finished difference. Result has 143 places, 173 transitions, 1953 flow [2024-06-03 19:54:20,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1706, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1953, PETRI_PLACES=143, PETRI_TRANSITIONS=173} [2024-06-03 19:54:20,580 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2024-06-03 19:54:20,580 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 173 transitions, 1953 flow [2024-06-03 19:54:20,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:20,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:20,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:20,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 19:54:20,581 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)] === [2024-06-03 19:54:20,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:20,581 INFO L85 PathProgramCache]: Analyzing trace with hash 428541217, now seen corresponding path program 5 times [2024-06-03 19:54:20,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:20,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912356155] [2024-06-03 19:54:20,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:20,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:21,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:21,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:21,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912356155] [2024-06-03 19:54:21,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912356155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:21,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:21,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:54:21,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448631088] [2024-06-03 19:54:21,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:21,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:54:21,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:21,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:54:21,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:54:21,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:54:21,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 173 transitions, 1953 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:21,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:21,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:54:21,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:22,344 INFO L124 PetriNetUnfolderBase]: 2404/3670 cut-off events. [2024-06-03 19:54:22,344 INFO L125 PetriNetUnfolderBase]: For 107281/107308 co-relation queries the response was YES. [2024-06-03 19:54:22,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22688 conditions, 3670 events. 2404/3670 cut-off events. For 107281/107308 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 18270 event pairs, 547 based on Foata normal form. 37/3693 useless extension candidates. Maximal degree in co-relation 22623. Up to 3131 conditions per place. [2024-06-03 19:54:22,368 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 137 selfloop transitions, 70 changer transitions 0/210 dead transitions. [2024-06-03 19:54:22,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 210 transitions, 2527 flow [2024-06-03 19:54:22,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:54:22,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:54:22,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-03 19:54:22,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-03 19:54:22,370 INFO L175 Difference]: Start difference. First operand has 143 places, 173 transitions, 1953 flow. Second operand 9 states and 156 transitions. [2024-06-03 19:54:22,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 210 transitions, 2527 flow [2024-06-03 19:54:22,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 210 transitions, 2280 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-03 19:54:22,489 INFO L231 Difference]: Finished difference. Result has 146 places, 174 transitions, 1898 flow [2024-06-03 19:54:22,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1706, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1898, PETRI_PLACES=146, PETRI_TRANSITIONS=174} [2024-06-03 19:54:22,490 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-03 19:54:22,490 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 174 transitions, 1898 flow [2024-06-03 19:54:22,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:22,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:22,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:22,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 19:54:22,491 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:54:22,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:22,491 INFO L85 PathProgramCache]: Analyzing trace with hash -614589830, now seen corresponding path program 2 times [2024-06-03 19:54:22,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:22,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471767148] [2024-06-03 19:54:22,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:22,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:22,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:23,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:23,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:23,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471767148] [2024-06-03 19:54:23,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471767148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:23,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:23,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:54:23,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670066511] [2024-06-03 19:54:23,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:23,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:54:23,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:23,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:54:23,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:54:23,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:54:23,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 174 transitions, 1898 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:23,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:23,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:54:23,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:23,940 INFO L124 PetriNetUnfolderBase]: 2401/3663 cut-off events. [2024-06-03 19:54:23,940 INFO L125 PetriNetUnfolderBase]: For 99051/99081 co-relation queries the response was YES. [2024-06-03 19:54:23,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22279 conditions, 3663 events. 2401/3663 cut-off events. For 99051/99081 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 18227 event pairs, 559 based on Foata normal form. 21/3677 useless extension candidates. Maximal degree in co-relation 22213. Up to 3611 conditions per place. [2024-06-03 19:54:23,969 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 163 selfloop transitions, 19 changer transitions 0/185 dead transitions. [2024-06-03 19:54:23,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 185 transitions, 2300 flow [2024-06-03 19:54:23,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:54:23,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:54:23,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 91 transitions. [2024-06-03 19:54:23,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699186991869919 [2024-06-03 19:54:23,970 INFO L175 Difference]: Start difference. First operand has 146 places, 174 transitions, 1898 flow. Second operand 6 states and 91 transitions. [2024-06-03 19:54:23,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 185 transitions, 2300 flow [2024-06-03 19:54:24,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 185 transitions, 2110 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-03 19:54:24,096 INFO L231 Difference]: Finished difference. Result has 145 places, 174 transitions, 1752 flow [2024-06-03 19:54:24,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1708, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1752, PETRI_PLACES=145, PETRI_TRANSITIONS=174} [2024-06-03 19:54:24,097 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-03 19:54:24,097 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 174 transitions, 1752 flow [2024-06-03 19:54:24,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:24,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:24,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:24,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 19:54:24,098 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:54:24,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:24,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1874481212, now seen corresponding path program 1 times [2024-06-03 19:54:24,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:24,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003246959] [2024-06-03 19:54:24,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:24,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:24,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:24,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:24,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:24,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003246959] [2024-06-03 19:54:24,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003246959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:24,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:24,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:54:24,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960202852] [2024-06-03 19:54:24,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:24,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:54:24,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:24,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:54:24,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:54:24,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:54:24,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 174 transitions, 1752 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:24,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:24,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:54:24,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:25,353 INFO L124 PetriNetUnfolderBase]: 2242/3509 cut-off events. [2024-06-03 19:54:25,353 INFO L125 PetriNetUnfolderBase]: For 85275/85275 co-relation queries the response was YES. [2024-06-03 19:54:25,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20286 conditions, 3509 events. 2242/3509 cut-off events. For 85275/85275 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18152 event pairs, 502 based on Foata normal form. 2/3496 useless extension candidates. Maximal degree in co-relation 20219. Up to 3372 conditions per place. [2024-06-03 19:54:25,377 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 173 selfloop transitions, 18 changer transitions 0/198 dead transitions. [2024-06-03 19:54:25,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 198 transitions, 2296 flow [2024-06-03 19:54:25,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:54:25,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:54:25,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-03 19:54:25,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 19:54:25,379 INFO L175 Difference]: Start difference. First operand has 145 places, 174 transitions, 1752 flow. Second operand 6 states and 102 transitions. [2024-06-03 19:54:25,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 198 transitions, 2296 flow [2024-06-03 19:54:25,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 198 transitions, 2256 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 19:54:25,487 INFO L231 Difference]: Finished difference. Result has 148 places, 183 transitions, 1836 flow [2024-06-03 19:54:25,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1712, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1836, PETRI_PLACES=148, PETRI_TRANSITIONS=183} [2024-06-03 19:54:25,488 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-03 19:54:25,488 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 183 transitions, 1836 flow [2024-06-03 19:54:25,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:25,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:25,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:25,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 19:54:25,488 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)] === [2024-06-03 19:54:25,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:25,489 INFO L85 PathProgramCache]: Analyzing trace with hash 129893212, now seen corresponding path program 2 times [2024-06-03 19:54:25,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:25,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935844022] [2024-06-03 19:54:25,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:25,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:25,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:26,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:26,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:26,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935844022] [2024-06-03 19:54:26,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935844022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:26,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:26,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:54:26,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549631365] [2024-06-03 19:54:26,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:26,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:54:26,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:26,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:54:26,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:54:26,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:54:26,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 183 transitions, 1836 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:26,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:26,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:54:26,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:26,721 INFO L124 PetriNetUnfolderBase]: 2241/3507 cut-off events. [2024-06-03 19:54:26,721 INFO L125 PetriNetUnfolderBase]: For 89845/89845 co-relation queries the response was YES. [2024-06-03 19:54:26,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20832 conditions, 3507 events. 2241/3507 cut-off events. For 89845/89845 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 18147 event pairs, 500 based on Foata normal form. 3/3498 useless extension candidates. Maximal degree in co-relation 20763. Up to 3386 conditions per place. [2024-06-03 19:54:26,743 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 173 selfloop transitions, 13 changer transitions 0/193 dead transitions. [2024-06-03 19:54:26,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 193 transitions, 2238 flow [2024-06-03 19:54:26,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:54:26,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:54:26,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-03 19:54:26,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861788617886179 [2024-06-03 19:54:26,744 INFO L175 Difference]: Start difference. First operand has 148 places, 183 transitions, 1836 flow. Second operand 6 states and 95 transitions. [2024-06-03 19:54:26,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 193 transitions, 2238 flow [2024-06-03 19:54:26,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 193 transitions, 2198 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-06-03 19:54:26,849 INFO L231 Difference]: Finished difference. Result has 153 places, 183 transitions, 1829 flow [2024-06-03 19:54:26,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1796, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1829, PETRI_PLACES=153, PETRI_TRANSITIONS=183} [2024-06-03 19:54:26,849 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-03 19:54:26,849 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 183 transitions, 1829 flow [2024-06-03 19:54:26,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:26,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:26,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:26,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 19:54:26,850 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)] === [2024-06-03 19:54:26,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:26,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1618726073, now seen corresponding path program 1 times [2024-06-03 19:54:26,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:26,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075991028] [2024-06-03 19:54:26,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:26,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:26,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:27,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:27,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:27,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075991028] [2024-06-03 19:54:27,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075991028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:27,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:27,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:54:27,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207204029] [2024-06-03 19:54:27,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:27,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:54:27,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:27,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:54:27,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:54:27,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:54:27,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 183 transitions, 1829 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:27,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:27,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:54:27,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:28,727 INFO L124 PetriNetUnfolderBase]: 2529/3866 cut-off events. [2024-06-03 19:54:28,728 INFO L125 PetriNetUnfolderBase]: For 121708/121722 co-relation queries the response was YES. [2024-06-03 19:54:28,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23535 conditions, 3866 events. 2529/3866 cut-off events. For 121708/121722 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 19588 event pairs, 550 based on Foata normal form. 34/3897 useless extension candidates. Maximal degree in co-relation 23463. Up to 3546 conditions per place. [2024-06-03 19:54:28,757 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 193 selfloop transitions, 39 changer transitions 0/235 dead transitions. [2024-06-03 19:54:28,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 235 transitions, 2525 flow [2024-06-03 19:54:28,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:54:28,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:54:28,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-03 19:54:28,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40487804878048783 [2024-06-03 19:54:28,759 INFO L175 Difference]: Start difference. First operand has 153 places, 183 transitions, 1829 flow. Second operand 10 states and 166 transitions. [2024-06-03 19:54:28,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 235 transitions, 2525 flow [2024-06-03 19:54:28,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 235 transitions, 2485 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 19:54:28,873 INFO L231 Difference]: Finished difference. Result has 159 places, 190 transitions, 1981 flow [2024-06-03 19:54:28,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1789, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1981, PETRI_PLACES=159, PETRI_TRANSITIONS=190} [2024-06-03 19:54:28,873 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 117 predicate places. [2024-06-03 19:54:28,873 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 190 transitions, 1981 flow [2024-06-03 19:54:28,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:28,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:28,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:28,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 19:54:28,874 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)] === [2024-06-03 19:54:28,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:28,874 INFO L85 PathProgramCache]: Analyzing trace with hash 2067991144, now seen corresponding path program 1 times [2024-06-03 19:54:28,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:28,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504925891] [2024-06-03 19:54:28,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:28,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:28,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:29,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:29,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:29,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504925891] [2024-06-03 19:54:29,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504925891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:29,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:29,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:54:29,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767258538] [2024-06-03 19:54:29,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:29,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:54:29,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:29,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:54:29,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:54:29,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:54:29,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 190 transitions, 1981 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:29,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:29,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:54:29,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:30,554 INFO L124 PetriNetUnfolderBase]: 2539/3879 cut-off events. [2024-06-03 19:54:30,555 INFO L125 PetriNetUnfolderBase]: For 120384/120392 co-relation queries the response was YES. [2024-06-03 19:54:30,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24097 conditions, 3879 events. 2539/3879 cut-off events. For 120384/120392 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 19647 event pairs, 574 based on Foata normal form. 10/3886 useless extension candidates. Maximal degree in co-relation 24024. Up to 3734 conditions per place. [2024-06-03 19:54:30,587 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 180 selfloop transitions, 38 changer transitions 0/221 dead transitions. [2024-06-03 19:54:30,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 221 transitions, 2615 flow [2024-06-03 19:54:30,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:54:30,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:54:30,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-03 19:54:30,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-03 19:54:30,589 INFO L175 Difference]: Start difference. First operand has 159 places, 190 transitions, 1981 flow. Second operand 7 states and 118 transitions. [2024-06-03 19:54:30,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 221 transitions, 2615 flow [2024-06-03 19:54:30,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 221 transitions, 2513 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-03 19:54:30,728 INFO L231 Difference]: Finished difference. Result has 160 places, 196 transitions, 2024 flow [2024-06-03 19:54:30,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1879, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2024, PETRI_PLACES=160, PETRI_TRANSITIONS=196} [2024-06-03 19:54:30,729 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2024-06-03 19:54:30,729 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 196 transitions, 2024 flow [2024-06-03 19:54:30,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:30,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:30,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:30,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 19:54:30,730 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:54:30,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:30,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1068963895, now seen corresponding path program 2 times [2024-06-03 19:54:30,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:30,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653641235] [2024-06-03 19:54:30,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:30,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:30,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:31,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:31,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:31,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653641235] [2024-06-03 19:54:31,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653641235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:31,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:31,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:54:31,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165704827] [2024-06-03 19:54:31,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:31,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:54:31,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:31,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:54:31,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:54:31,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:54:31,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 196 transitions, 2024 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:31,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:31,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:54:31,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:32,540 INFO L124 PetriNetUnfolderBase]: 2675/4097 cut-off events. [2024-06-03 19:54:32,540 INFO L125 PetriNetUnfolderBase]: For 136403/136409 co-relation queries the response was YES. [2024-06-03 19:54:32,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25447 conditions, 4097 events. 2675/4097 cut-off events. For 136403/136409 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 21082 event pairs, 576 based on Foata normal form. 26/4120 useless extension candidates. Maximal degree in co-relation 25373. Up to 3588 conditions per place. [2024-06-03 19:54:32,572 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 182 selfloop transitions, 63 changer transitions 0/248 dead transitions. [2024-06-03 19:54:32,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 248 transitions, 2782 flow [2024-06-03 19:54:32,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:54:32,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:54:32,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-03 19:54:32,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 19:54:32,573 INFO L175 Difference]: Start difference. First operand has 160 places, 196 transitions, 2024 flow. Second operand 10 states and 170 transitions. [2024-06-03 19:54:32,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 248 transitions, 2782 flow [2024-06-03 19:54:32,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 248 transitions, 2738 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-03 19:54:32,711 INFO L231 Difference]: Finished difference. Result has 168 places, 206 transitions, 2264 flow [2024-06-03 19:54:32,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1980, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2264, PETRI_PLACES=168, PETRI_TRANSITIONS=206} [2024-06-03 19:54:32,712 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-03 19:54:32,712 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 206 transitions, 2264 flow [2024-06-03 19:54:32,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:32,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:32,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:32,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 19:54:32,712 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:54:32,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:32,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1074535525, now seen corresponding path program 3 times [2024-06-03 19:54:32,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:32,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955272319] [2024-06-03 19:54:32,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:32,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:33,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:33,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:33,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955272319] [2024-06-03 19:54:33,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955272319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:33,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:33,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:54:33,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562075150] [2024-06-03 19:54:33,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:33,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:54:33,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:33,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:54:33,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:54:33,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:54:33,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 206 transitions, 2264 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:33,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:33,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:54:33,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:34,401 INFO L124 PetriNetUnfolderBase]: 2878/4430 cut-off events. [2024-06-03 19:54:34,402 INFO L125 PetriNetUnfolderBase]: For 161853/161859 co-relation queries the response was YES. [2024-06-03 19:54:34,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28662 conditions, 4430 events. 2878/4430 cut-off events. For 161853/161859 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 23432 event pairs, 605 based on Foata normal form. 22/4449 useless extension candidates. Maximal degree in co-relation 28585. Up to 3311 conditions per place. [2024-06-03 19:54:34,436 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 183 selfloop transitions, 68 changer transitions 0/254 dead transitions. [2024-06-03 19:54:34,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 254 transitions, 3158 flow [2024-06-03 19:54:34,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:54:34,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:54:34,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 19:54:34,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-03 19:54:34,438 INFO L175 Difference]: Start difference. First operand has 168 places, 206 transitions, 2264 flow. Second operand 9 states and 157 transitions. [2024-06-03 19:54:34,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 254 transitions, 3158 flow [2024-06-03 19:54:34,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 254 transitions, 3028 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-03 19:54:34,589 INFO L231 Difference]: Finished difference. Result has 173 places, 210 transitions, 2416 flow [2024-06-03 19:54:34,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2134, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2416, PETRI_PLACES=173, PETRI_TRANSITIONS=210} [2024-06-03 19:54:34,590 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 131 predicate places. [2024-06-03 19:54:34,590 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 210 transitions, 2416 flow [2024-06-03 19:54:34,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:34,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:34,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:34,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 19:54:34,591 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)] === [2024-06-03 19:54:34,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:34,591 INFO L85 PathProgramCache]: Analyzing trace with hash 903147427, now seen corresponding path program 4 times [2024-06-03 19:54:34,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:34,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52475552] [2024-06-03 19:54:34,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:34,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:35,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:35,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:35,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52475552] [2024-06-03 19:54:35,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52475552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:35,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:35,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:54:35,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016750240] [2024-06-03 19:54:35,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:35,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:54:35,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:35,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:54:35,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:54:35,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:54:35,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 210 transitions, 2416 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:35,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:35,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:54:35,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:36,533 INFO L124 PetriNetUnfolderBase]: 2939/4532 cut-off events. [2024-06-03 19:54:36,534 INFO L125 PetriNetUnfolderBase]: For 170473/170479 co-relation queries the response was YES. [2024-06-03 19:54:36,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29426 conditions, 4532 events. 2939/4532 cut-off events. For 170473/170479 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 24208 event pairs, 641 based on Foata normal form. 26/4555 useless extension candidates. Maximal degree in co-relation 29347. Up to 3899 conditions per place. [2024-06-03 19:54:36,575 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 187 selfloop transitions, 67 changer transitions 0/257 dead transitions. [2024-06-03 19:54:36,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 257 transitions, 3160 flow [2024-06-03 19:54:36,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:54:36,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:54:36,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-03 19:54:36,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121951219512195 [2024-06-03 19:54:36,577 INFO L175 Difference]: Start difference. First operand has 173 places, 210 transitions, 2416 flow. Second operand 10 states and 169 transitions. [2024-06-03 19:54:36,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 257 transitions, 3160 flow [2024-06-03 19:54:36,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 257 transitions, 3077 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-03 19:54:36,759 INFO L231 Difference]: Finished difference. Result has 179 places, 215 transitions, 2579 flow [2024-06-03 19:54:36,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2333, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2579, PETRI_PLACES=179, PETRI_TRANSITIONS=215} [2024-06-03 19:54:36,759 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 137 predicate places. [2024-06-03 19:54:36,760 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 215 transitions, 2579 flow [2024-06-03 19:54:36,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:36,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:36,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:36,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 19:54:36,760 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:54:36,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:36,761 INFO L85 PathProgramCache]: Analyzing trace with hash -940126112, now seen corresponding path program 2 times [2024-06-03 19:54:36,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:36,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202708327] [2024-06-03 19:54:36,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:36,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:36,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:37,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:37,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:37,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202708327] [2024-06-03 19:54:37,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202708327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:37,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:37,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:54:37,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460778358] [2024-06-03 19:54:37,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:37,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:54:37,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:37,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:54:37,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:54:37,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:54:37,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 215 transitions, 2579 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:37,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:37,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:54:37,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:38,498 INFO L124 PetriNetUnfolderBase]: 2949/4546 cut-off events. [2024-06-03 19:54:38,498 INFO L125 PetriNetUnfolderBase]: For 166540/166546 co-relation queries the response was YES. [2024-06-03 19:54:38,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29793 conditions, 4546 events. 2949/4546 cut-off events. For 166540/166546 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 24330 event pairs, 707 based on Foata normal form. 8/4551 useless extension candidates. Maximal degree in co-relation 29712. Up to 4395 conditions per place. [2024-06-03 19:54:38,539 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 194 selfloop transitions, 40 changer transitions 0/237 dead transitions. [2024-06-03 19:54:38,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 237 transitions, 3205 flow [2024-06-03 19:54:38,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:54:38,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:54:38,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-03 19:54:38,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-03 19:54:38,541 INFO L175 Difference]: Start difference. First operand has 179 places, 215 transitions, 2579 flow. Second operand 7 states and 114 transitions. [2024-06-03 19:54:38,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 237 transitions, 3205 flow [2024-06-03 19:54:38,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 237 transitions, 3037 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-03 19:54:38,792 INFO L231 Difference]: Finished difference. Result has 180 places, 218 transitions, 2525 flow [2024-06-03 19:54:38,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2411, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2525, PETRI_PLACES=180, PETRI_TRANSITIONS=218} [2024-06-03 19:54:38,794 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-03 19:54:38,794 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 218 transitions, 2525 flow [2024-06-03 19:54:38,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:38,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:38,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:38,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 19:54:38,795 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:54:38,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:38,795 INFO L85 PathProgramCache]: Analyzing trace with hash -940125740, now seen corresponding path program 1 times [2024-06-03 19:54:38,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:38,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292653937] [2024-06-03 19:54:38,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:38,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:38,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:39,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:39,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292653937] [2024-06-03 19:54:39,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292653937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:39,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:39,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:54:39,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525698825] [2024-06-03 19:54:39,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:39,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:54:39,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:39,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:54:39,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:54:39,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:54:39,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 218 transitions, 2525 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:39,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:39,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:54:39,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:40,414 INFO L124 PetriNetUnfolderBase]: 2959/4558 cut-off events. [2024-06-03 19:54:40,414 INFO L125 PetriNetUnfolderBase]: For 167566/167574 co-relation queries the response was YES. [2024-06-03 19:54:40,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29527 conditions, 4558 events. 2959/4558 cut-off events. For 167566/167574 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 24374 event pairs, 700 based on Foata normal form. 10/4565 useless extension candidates. Maximal degree in co-relation 29445. Up to 4483 conditions per place. [2024-06-03 19:54:40,448 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 213 selfloop transitions, 28 changer transitions 0/244 dead transitions. [2024-06-03 19:54:40,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 244 transitions, 3231 flow [2024-06-03 19:54:40,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:54:40,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:54:40,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-03 19:54:40,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-03 19:54:40,450 INFO L175 Difference]: Start difference. First operand has 180 places, 218 transitions, 2525 flow. Second operand 7 states and 114 transitions. [2024-06-03 19:54:40,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 244 transitions, 3231 flow [2024-06-03 19:54:40,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 244 transitions, 3165 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-03 19:54:40,691 INFO L231 Difference]: Finished difference. Result has 183 places, 224 transitions, 2611 flow [2024-06-03 19:54:40,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2459, PETRI_DIFFERENCE_MINUEND_PLACES=176, 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=2611, PETRI_PLACES=183, PETRI_TRANSITIONS=224} [2024-06-03 19:54:40,692 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-03 19:54:40,692 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 224 transitions, 2611 flow [2024-06-03 19:54:40,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:40,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:40,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:40,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 19:54:40,693 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)] === [2024-06-03 19:54:40,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:40,693 INFO L85 PathProgramCache]: Analyzing trace with hash -868621959, now seen corresponding path program 5 times [2024-06-03 19:54:40,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:40,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316637361] [2024-06-03 19:54:40,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:40,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:41,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:41,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:41,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316637361] [2024-06-03 19:54:41,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316637361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:41,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:41,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:54:41,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135138719] [2024-06-03 19:54:41,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:41,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:54:41,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:41,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:54:41,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:54:41,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:54:41,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 224 transitions, 2611 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:41,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:41,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:54:41,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:42,476 INFO L124 PetriNetUnfolderBase]: 3192/4948 cut-off events. [2024-06-03 19:54:42,477 INFO L125 PetriNetUnfolderBase]: For 199056/199080 co-relation queries the response was YES. [2024-06-03 19:54:42,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32319 conditions, 4948 events. 3192/4948 cut-off events. For 199056/199080 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 27114 event pairs, 669 based on Foata normal form. 28/4962 useless extension candidates. Maximal degree in co-relation 32236. Up to 3847 conditions per place. [2024-06-03 19:54:42,522 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 165 selfloop transitions, 104 changer transitions 0/272 dead transitions. [2024-06-03 19:54:42,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 272 transitions, 3562 flow [2024-06-03 19:54:42,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:54:42,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:54:42,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-03 19:54:42,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-03 19:54:42,524 INFO L175 Difference]: Start difference. First operand has 183 places, 224 transitions, 2611 flow. Second operand 9 states and 160 transitions. [2024-06-03 19:54:42,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 272 transitions, 3562 flow [2024-06-03 19:54:42,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 272 transitions, 3503 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-03 19:54:42,779 INFO L231 Difference]: Finished difference. Result has 190 places, 230 transitions, 2916 flow [2024-06-03 19:54:42,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2552, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2916, PETRI_PLACES=190, PETRI_TRANSITIONS=230} [2024-06-03 19:54:42,780 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 148 predicate places. [2024-06-03 19:54:42,780 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 230 transitions, 2916 flow [2024-06-03 19:54:42,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:42,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:42,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:42,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 19:54:42,780 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)] === [2024-06-03 19:54:42,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:42,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1945639449, now seen corresponding path program 6 times [2024-06-03 19:54:42,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:42,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41244928] [2024-06-03 19:54:42,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:42,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:42,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:43,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:43,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41244928] [2024-06-03 19:54:43,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41244928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:43,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:43,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:54:43,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694755243] [2024-06-03 19:54:43,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:43,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:54:43,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:43,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:54:43,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:54:43,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:54:43,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 230 transitions, 2916 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:43,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:43,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:54:43,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:44,680 INFO L124 PetriNetUnfolderBase]: 3328/5176 cut-off events. [2024-06-03 19:54:44,680 INFO L125 PetriNetUnfolderBase]: For 226213/226237 co-relation queries the response was YES. [2024-06-03 19:54:44,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35031 conditions, 5176 events. 3328/5176 cut-off events. For 226213/226237 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 28664 event pairs, 656 based on Foata normal form. 28/5190 useless extension candidates. Maximal degree in co-relation 34945. Up to 2665 conditions per place. [2024-06-03 19:54:44,720 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 154 selfloop transitions, 119 changer transitions 0/276 dead transitions. [2024-06-03 19:54:44,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 276 transitions, 3866 flow [2024-06-03 19:54:44,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:54:44,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:54:44,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-03 19:54:44,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-03 19:54:44,721 INFO L175 Difference]: Start difference. First operand has 190 places, 230 transitions, 2916 flow. Second operand 9 states and 158 transitions. [2024-06-03 19:54:44,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 276 transitions, 3866 flow [2024-06-03 19:54:44,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 276 transitions, 3773 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-03 19:54:44,948 INFO L231 Difference]: Finished difference. Result has 197 places, 233 transitions, 3236 flow [2024-06-03 19:54:44,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2823, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3236, PETRI_PLACES=197, PETRI_TRANSITIONS=233} [2024-06-03 19:54:44,948 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-03 19:54:44,949 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 233 transitions, 3236 flow [2024-06-03 19:54:44,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:44,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:44,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:44,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 19:54:44,949 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)] === [2024-06-03 19:54:44,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:44,950 INFO L85 PathProgramCache]: Analyzing trace with hash 399876473, now seen corresponding path program 7 times [2024-06-03 19:54:44,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:44,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706315171] [2024-06-03 19:54:44,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:44,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:44,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:45,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:45,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:45,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706315171] [2024-06-03 19:54:45,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706315171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:45,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:45,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:54:45,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321065033] [2024-06-03 19:54:45,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:45,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:54:45,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:45,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:54:45,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:54:45,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:54:45,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 233 transitions, 3236 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:45,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:45,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:54:45,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:46,724 INFO L124 PetriNetUnfolderBase]: 3336/5196 cut-off events. [2024-06-03 19:54:46,725 INFO L125 PetriNetUnfolderBase]: For 232419/232443 co-relation queries the response was YES. [2024-06-03 19:54:46,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35873 conditions, 5196 events. 3336/5196 cut-off events. For 232419/232443 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 28961 event pairs, 745 based on Foata normal form. 28/5210 useless extension candidates. Maximal degree in co-relation 35784. Up to 4123 conditions per place. [2024-06-03 19:54:46,772 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 175 selfloop transitions, 98 changer transitions 0/276 dead transitions. [2024-06-03 19:54:46,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 276 transitions, 4125 flow [2024-06-03 19:54:46,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:54:46,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:54:46,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-03 19:54:46,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 19:54:46,774 INFO L175 Difference]: Start difference. First operand has 197 places, 233 transitions, 3236 flow. Second operand 9 states and 162 transitions. [2024-06-03 19:54:46,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 276 transitions, 4125 flow [2024-06-03 19:54:47,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 276 transitions, 3963 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-03 19:54:47,145 INFO L231 Difference]: Finished difference. Result has 201 places, 234 transitions, 3329 flow [2024-06-03 19:54:47,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3074, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3329, PETRI_PLACES=201, PETRI_TRANSITIONS=234} [2024-06-03 19:54:47,145 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-03 19:54:47,145 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 234 transitions, 3329 flow [2024-06-03 19:54:47,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:47,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:47,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:47,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 19:54:47,146 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:54:47,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:47,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1872414210, now seen corresponding path program 2 times [2024-06-03 19:54:47,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:47,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018106781] [2024-06-03 19:54:47,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:47,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:47,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:47,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:47,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:47,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018106781] [2024-06-03 19:54:47,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018106781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:47,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:47,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:54:47,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977214411] [2024-06-03 19:54:47,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:47,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:54:47,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:47,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:54:47,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:54:47,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:54:47,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 234 transitions, 3329 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:47,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:47,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:54:47,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:48,803 INFO L124 PetriNetUnfolderBase]: 3346/5207 cut-off events. [2024-06-03 19:54:48,803 INFO L125 PetriNetUnfolderBase]: For 227567/227594 co-relation queries the response was YES. [2024-06-03 19:54:48,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36231 conditions, 5207 events. 3346/5207 cut-off events. For 227567/227594 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 29102 event pairs, 826 based on Foata normal form. 20/5220 useless extension candidates. Maximal degree in co-relation 36140. Up to 5126 conditions per place. [2024-06-03 19:54:48,856 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 219 selfloop transitions, 31 changer transitions 0/253 dead transitions. [2024-06-03 19:54:48,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 253 transitions, 4007 flow [2024-06-03 19:54:48,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:54:48,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:54:48,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-03 19:54:48,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37630662020905925 [2024-06-03 19:54:48,864 INFO L175 Difference]: Start difference. First operand has 201 places, 234 transitions, 3329 flow. Second operand 7 states and 108 transitions. [2024-06-03 19:54:48,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 253 transitions, 4007 flow [2024-06-03 19:54:49,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 253 transitions, 3556 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-03 19:54:49,239 INFO L231 Difference]: Finished difference. Result has 198 places, 237 transitions, 2988 flow [2024-06-03 19:54:49,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2878, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2988, PETRI_PLACES=198, PETRI_TRANSITIONS=237} [2024-06-03 19:54:49,239 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2024-06-03 19:54:49,239 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 237 transitions, 2988 flow [2024-06-03 19:54:49,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:49,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:49,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:49,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 19:54:49,240 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)] === [2024-06-03 19:54:49,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:49,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1872414582, now seen corresponding path program 3 times [2024-06-03 19:54:49,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:49,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763106474] [2024-06-03 19:54:49,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:49,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:49,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:49,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:49,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:49,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763106474] [2024-06-03 19:54:49,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763106474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:49,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:49,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:54:49,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21806962] [2024-06-03 19:54:49,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:49,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:54:49,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:49,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:54:49,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:54:50,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:54:50,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 237 transitions, 2988 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:50,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:50,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:54:50,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:50,919 INFO L124 PetriNetUnfolderBase]: 3340/5202 cut-off events. [2024-06-03 19:54:50,919 INFO L125 PetriNetUnfolderBase]: For 224659/224683 co-relation queries the response was YES. [2024-06-03 19:54:50,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34633 conditions, 5202 events. 3340/5202 cut-off events. For 224659/224683 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 29113 event pairs, 843 based on Foata normal form. 14/5202 useless extension candidates. Maximal degree in co-relation 34544. Up to 5051 conditions per place. [2024-06-03 19:54:50,968 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 206 selfloop transitions, 40 changer transitions 0/249 dead transitions. [2024-06-03 19:54:50,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 249 transitions, 3516 flow [2024-06-03 19:54:50,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:54:50,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:54:50,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-03 19:54:50,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37282229965156793 [2024-06-03 19:54:50,971 INFO L175 Difference]: Start difference. First operand has 198 places, 237 transitions, 2988 flow. Second operand 7 states and 107 transitions. [2024-06-03 19:54:50,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 249 transitions, 3516 flow [2024-06-03 19:54:51,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 249 transitions, 3407 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-03 19:54:51,313 INFO L231 Difference]: Finished difference. Result has 200 places, 237 transitions, 2965 flow [2024-06-03 19:54:51,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2879, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2965, PETRI_PLACES=200, PETRI_TRANSITIONS=237} [2024-06-03 19:54:51,313 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-03 19:54:51,314 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 237 transitions, 2965 flow [2024-06-03 19:54:51,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:51,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:51,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:51,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 19:54:51,314 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:54:51,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:51,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1871998500, now seen corresponding path program 3 times [2024-06-03 19:54:51,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:51,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733437876] [2024-06-03 19:54:51,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:51,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:52,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:52,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:52,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733437876] [2024-06-03 19:54:52,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733437876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:52,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:52,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:54:52,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605489145] [2024-06-03 19:54:52,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:52,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:54:52,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:52,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:54:52,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:54:52,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:54:52,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 237 transitions, 2965 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:52,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:52,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:54:52,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:53,108 INFO L124 PetriNetUnfolderBase]: 3334/5193 cut-off events. [2024-06-03 19:54:53,109 INFO L125 PetriNetUnfolderBase]: For 230034/230034 co-relation queries the response was YES. [2024-06-03 19:54:53,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34653 conditions, 5193 events. 3334/5193 cut-off events. For 230034/230034 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 29055 event pairs, 848 based on Foata normal form. 2/5192 useless extension candidates. Maximal degree in co-relation 34563. Up to 5153 conditions per place. [2024-06-03 19:54:53,159 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 229 selfloop transitions, 16 changer transitions 0/248 dead transitions. [2024-06-03 19:54:53,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 248 transitions, 3487 flow [2024-06-03 19:54:53,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:54:53,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:54:53,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2024-06-03 19:54:53,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3554006968641115 [2024-06-03 19:54:53,161 INFO L175 Difference]: Start difference. First operand has 200 places, 237 transitions, 2965 flow. Second operand 7 states and 102 transitions. [2024-06-03 19:54:53,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 248 transitions, 3487 flow [2024-06-03 19:54:53,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 248 transitions, 3332 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-03 19:54:53,560 INFO L231 Difference]: Finished difference. Result has 200 places, 237 transitions, 2849 flow [2024-06-03 19:54:53,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2810, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2849, PETRI_PLACES=200, PETRI_TRANSITIONS=237} [2024-06-03 19:54:53,561 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-03 19:54:53,561 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 237 transitions, 2849 flow [2024-06-03 19:54:53,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:53,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:53,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:53,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 19:54:53,562 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:54:53,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:53,562 INFO L85 PathProgramCache]: Analyzing trace with hash 2020505752, now seen corresponding path program 1 times [2024-06-03 19:54:53,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:53,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374513787] [2024-06-03 19:54:53,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:53,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:53,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:54,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:54,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:54,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374513787] [2024-06-03 19:54:54,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374513787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:54,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:54,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:54:54,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059300537] [2024-06-03 19:54:54,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:54,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:54:54,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:54,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:54:54,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:54:54,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:54:54,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 237 transitions, 2849 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:54,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:54,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:54:54,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:55,144 INFO L124 PetriNetUnfolderBase]: 3196/5060 cut-off events. [2024-06-03 19:54:55,144 INFO L125 PetriNetUnfolderBase]: For 207331/207335 co-relation queries the response was YES. [2024-06-03 19:54:55,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32909 conditions, 5060 events. 3196/5060 cut-off events. For 207331/207335 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 29057 event pairs, 775 based on Foata normal form. 2/5049 useless extension candidates. Maximal degree in co-relation 32818. Up to 4925 conditions per place. [2024-06-03 19:54:55,191 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 233 selfloop transitions, 14 changer transitions 0/257 dead transitions. [2024-06-03 19:54:55,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 257 transitions, 3441 flow [2024-06-03 19:54:55,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:54:55,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:54:55,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-03 19:54:55,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-03 19:54:55,193 INFO L175 Difference]: Start difference. First operand has 200 places, 237 transitions, 2849 flow. Second operand 7 states and 113 transitions. [2024-06-03 19:54:55,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 257 transitions, 3441 flow [2024-06-03 19:54:55,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 257 transitions, 3376 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-03 19:54:55,571 INFO L231 Difference]: Finished difference. Result has 199 places, 240 transitions, 2870 flow [2024-06-03 19:54:55,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2784, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2870, PETRI_PLACES=199, PETRI_TRANSITIONS=240} [2024-06-03 19:54:55,572 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2024-06-03 19:54:55,572 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 240 transitions, 2870 flow [2024-06-03 19:54:55,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:55,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:55,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:55,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 19:54:55,572 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:54:55,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:55,573 INFO L85 PathProgramCache]: Analyzing trace with hash -2049361404, now seen corresponding path program 2 times [2024-06-03 19:54:55,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:55,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892479382] [2024-06-03 19:54:55,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:55,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:55,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:56,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:56,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892479382] [2024-06-03 19:54:56,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892479382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:56,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:56,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:54:56,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073111900] [2024-06-03 19:54:56,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:56,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:54:56,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:56,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:54:56,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:54:56,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:54:56,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 240 transitions, 2870 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:56,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:56,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:54:56,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:57,128 INFO L124 PetriNetUnfolderBase]: 3211/5081 cut-off events. [2024-06-03 19:54:57,128 INFO L125 PetriNetUnfolderBase]: For 214335/214339 co-relation queries the response was YES. [2024-06-03 19:54:57,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33539 conditions, 5081 events. 3211/5081 cut-off events. For 214335/214339 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 29128 event pairs, 776 based on Foata normal form. 2/5067 useless extension candidates. Maximal degree in co-relation 33449. Up to 4906 conditions per place. [2024-06-03 19:54:57,174 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 225 selfloop transitions, 28 changer transitions 0/263 dead transitions. [2024-06-03 19:54:57,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 263 transitions, 3622 flow [2024-06-03 19:54:57,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:54:57,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:54:57,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-03 19:54:57,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-03 19:54:57,175 INFO L175 Difference]: Start difference. First operand has 199 places, 240 transitions, 2870 flow. Second operand 7 states and 117 transitions. [2024-06-03 19:54:57,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 263 transitions, 3622 flow [2024-06-03 19:54:57,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 263 transitions, 3558 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-03 19:54:57,533 INFO L231 Difference]: Finished difference. Result has 201 places, 246 transitions, 2978 flow [2024-06-03 19:54:57,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2806, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2978, PETRI_PLACES=201, PETRI_TRANSITIONS=246} [2024-06-03 19:54:57,534 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-03 19:54:57,534 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 246 transitions, 2978 flow [2024-06-03 19:54:57,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:57,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:57,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:57,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 19:54:57,535 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:54:57,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:57,535 INFO L85 PathProgramCache]: Analyzing trace with hash -250401974, now seen corresponding path program 3 times [2024-06-03 19:54:57,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:57,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904471157] [2024-06-03 19:54:57,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:57,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:58,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:58,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:58,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904471157] [2024-06-03 19:54:58,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904471157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:58,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:58,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:54:58,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232223504] [2024-06-03 19:54:58,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:58,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:54:58,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:58,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:54:58,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:54:58,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:54:58,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 246 transitions, 2978 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:58,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:58,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:54:58,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:59,131 INFO L124 PetriNetUnfolderBase]: 3191/5052 cut-off events. [2024-06-03 19:54:59,131 INFO L125 PetriNetUnfolderBase]: For 220377/220381 co-relation queries the response was YES. [2024-06-03 19:54:59,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33585 conditions, 5052 events. 3191/5052 cut-off events. For 220377/220381 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28990 event pairs, 772 based on Foata normal form. 3/5042 useless extension candidates. Maximal degree in co-relation 33494. Up to 4918 conditions per place. [2024-06-03 19:54:59,176 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 232 selfloop transitions, 16 changer transitions 0/258 dead transitions. [2024-06-03 19:54:59,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 258 transitions, 3510 flow [2024-06-03 19:54:59,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:54:59,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:54:59,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-03 19:54:59,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37630662020905925 [2024-06-03 19:54:59,177 INFO L175 Difference]: Start difference. First operand has 201 places, 246 transitions, 2978 flow. Second operand 7 states and 108 transitions. [2024-06-03 19:54:59,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 258 transitions, 3510 flow [2024-06-03 19:54:59,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 258 transitions, 3408 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-03 19:54:59,680 INFO L231 Difference]: Finished difference. Result has 205 places, 246 transitions, 2914 flow [2024-06-03 19:54:59,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2876, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2914, PETRI_PLACES=205, PETRI_TRANSITIONS=246} [2024-06-03 19:54:59,680 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-03 19:54:59,680 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 246 transitions, 2914 flow [2024-06-03 19:54:59,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:59,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:59,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:59,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 19:54:59,681 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:54:59,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:59,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1871983620, now seen corresponding path program 1 times [2024-06-03 19:54:59,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:59,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72727220] [2024-06-03 19:54:59,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:59,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:59,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:00,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:00,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:00,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72727220] [2024-06-03 19:55:00,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72727220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:00,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:00,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:55:00,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598432014] [2024-06-03 19:55:00,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:00,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:55:00,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:00,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:55:00,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:55:00,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:55:00,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 246 transitions, 2914 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:00,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:00,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:55:00,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:01,820 INFO L124 PetriNetUnfolderBase]: 3358/5227 cut-off events. [2024-06-03 19:55:01,820 INFO L125 PetriNetUnfolderBase]: For 259260/259260 co-relation queries the response was YES. [2024-06-03 19:55:01,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35688 conditions, 5227 events. 3358/5227 cut-off events. For 259260/259260 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 29150 event pairs, 853 based on Foata normal form. 2/5226 useless extension candidates. Maximal degree in co-relation 35595. Up to 5189 conditions per place. [2024-06-03 19:55:01,868 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 241 selfloop transitions, 15 changer transitions 0/259 dead transitions. [2024-06-03 19:55:01,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 259 transitions, 3492 flow [2024-06-03 19:55:01,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:55:01,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:55:01,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2024-06-03 19:55:01,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519163763066202 [2024-06-03 19:55:01,869 INFO L175 Difference]: Start difference. First operand has 205 places, 246 transitions, 2914 flow. Second operand 7 states and 101 transitions. [2024-06-03 19:55:01,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 259 transitions, 3492 flow [2024-06-03 19:55:02,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 259 transitions, 3443 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 19:55:02,465 INFO L231 Difference]: Finished difference. Result has 206 places, 248 transitions, 2940 flow [2024-06-03 19:55:02,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2865, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2940, PETRI_PLACES=206, PETRI_TRANSITIONS=248} [2024-06-03 19:55:02,466 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-03 19:55:02,466 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 248 transitions, 2940 flow [2024-06-03 19:55:02,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:02,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:02,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:02,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 19:55:02,466 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)] === [2024-06-03 19:55:02,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:02,467 INFO L85 PathProgramCache]: Analyzing trace with hash 185561816, now seen corresponding path program 1 times [2024-06-03 19:55:02,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:02,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913740688] [2024-06-03 19:55:02,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:02,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:02,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:03,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:03,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:03,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913740688] [2024-06-03 19:55:03,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913740688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:03,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:03,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:55:03,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980102503] [2024-06-03 19:55:03,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:03,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:55:03,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:03,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:55:03,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:55:03,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:55:03,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 248 transitions, 2940 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:03,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:03,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:55:03,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:04,837 INFO L124 PetriNetUnfolderBase]: 3399/5294 cut-off events. [2024-06-03 19:55:04,837 INFO L125 PetriNetUnfolderBase]: For 279713/279721 co-relation queries the response was YES. [2024-06-03 19:55:04,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36427 conditions, 5294 events. 3399/5294 cut-off events. For 279713/279721 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 29531 event pairs, 643 based on Foata normal form. 20/5311 useless extension candidates. Maximal degree in co-relation 36333. Up to 4958 conditions per place. [2024-06-03 19:55:04,890 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 254 selfloop transitions, 38 changer transitions 0/295 dead transitions. [2024-06-03 19:55:04,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 295 transitions, 3726 flow [2024-06-03 19:55:04,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:55:04,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:55:04,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-03 19:55:04,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 19:55:04,891 INFO L175 Difference]: Start difference. First operand has 206 places, 248 transitions, 2940 flow. Second operand 10 states and 160 transitions. [2024-06-03 19:55:04,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 295 transitions, 3726 flow [2024-06-03 19:55:05,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 295 transitions, 3667 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-03 19:55:05,426 INFO L231 Difference]: Finished difference. Result has 212 places, 252 transitions, 3041 flow [2024-06-03 19:55:05,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2881, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3041, PETRI_PLACES=212, PETRI_TRANSITIONS=252} [2024-06-03 19:55:05,427 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-03 19:55:05,427 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 252 transitions, 3041 flow [2024-06-03 19:55:05,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:05,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:05,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:05,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 19:55:05,428 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)] === [2024-06-03 19:55:05,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:05,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1255231258, now seen corresponding path program 2 times [2024-06-03 19:55:05,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:05,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155420603] [2024-06-03 19:55:05,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:05,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:05,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:06,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:06,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:06,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155420603] [2024-06-03 19:55:06,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155420603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:06,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:06,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:55:06,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785434163] [2024-06-03 19:55:06,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:06,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:55:06,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:06,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:55:06,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:55:06,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:55:06,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 252 transitions, 3041 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:06,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:06,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:55:06,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:07,674 INFO L124 PetriNetUnfolderBase]: 3440/5367 cut-off events. [2024-06-03 19:55:07,674 INFO L125 PetriNetUnfolderBase]: For 293358/293364 co-relation queries the response was YES. [2024-06-03 19:55:07,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37389 conditions, 5367 events. 3440/5367 cut-off events. For 293358/293364 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 30212 event pairs, 750 based on Foata normal form. 18/5382 useless extension candidates. Maximal degree in co-relation 37293. Up to 4859 conditions per place. [2024-06-03 19:55:07,728 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 229 selfloop transitions, 61 changer transitions 0/293 dead transitions. [2024-06-03 19:55:07,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 293 transitions, 3835 flow [2024-06-03 19:55:07,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:55:07,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:55:07,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-03 19:55:07,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-03 19:55:07,732 INFO L175 Difference]: Start difference. First operand has 212 places, 252 transitions, 3041 flow. Second operand 9 states and 148 transitions. [2024-06-03 19:55:07,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 293 transitions, 3835 flow [2024-06-03 19:55:08,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 293 transitions, 3716 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-03 19:55:08,262 INFO L231 Difference]: Finished difference. Result has 215 places, 258 transitions, 3183 flow [2024-06-03 19:55:08,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2922, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3183, PETRI_PLACES=215, PETRI_TRANSITIONS=258} [2024-06-03 19:55:08,263 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-03 19:55:08,263 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 258 transitions, 3183 flow [2024-06-03 19:55:08,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:08,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:08,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:08,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 19:55:08,264 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:08,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:08,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1774315642, now seen corresponding path program 3 times [2024-06-03 19:55:08,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:08,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245157558] [2024-06-03 19:55:08,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:08,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:09,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:09,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:09,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245157558] [2024-06-03 19:55:09,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245157558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:09,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:09,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:55:09,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795231513] [2024-06-03 19:55:09,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:09,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:55:09,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:09,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:55:09,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:55:09,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:55:09,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 258 transitions, 3183 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:09,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:09,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:55:09,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:10,396 INFO L124 PetriNetUnfolderBase]: 3481/5438 cut-off events. [2024-06-03 19:55:10,396 INFO L125 PetriNetUnfolderBase]: For 310531/310537 co-relation queries the response was YES. [2024-06-03 19:55:10,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38174 conditions, 5438 events. 3481/5438 cut-off events. For 310531/310537 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 30774 event pairs, 775 based on Foata normal form. 18/5453 useless extension candidates. Maximal degree in co-relation 38076. Up to 4997 conditions per place. [2024-06-03 19:55:10,454 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 233 selfloop transitions, 58 changer transitions 0/294 dead transitions. [2024-06-03 19:55:10,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 294 transitions, 3925 flow [2024-06-03 19:55:10,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:55:10,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:55:10,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-03 19:55:10,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-03 19:55:10,456 INFO L175 Difference]: Start difference. First operand has 215 places, 258 transitions, 3183 flow. Second operand 9 states and 148 transitions. [2024-06-03 19:55:10,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 294 transitions, 3925 flow [2024-06-03 19:55:10,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 294 transitions, 3725 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-03 19:55:10,959 INFO L231 Difference]: Finished difference. Result has 219 places, 259 transitions, 3162 flow [2024-06-03 19:55:10,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2983, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3162, PETRI_PLACES=219, PETRI_TRANSITIONS=259} [2024-06-03 19:55:10,960 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-03 19:55:10,960 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 259 transitions, 3162 flow [2024-06-03 19:55:10,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:10,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:10,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:10,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 19:55:10,961 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:10,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:10,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1774320292, now seen corresponding path program 4 times [2024-06-03 19:55:10,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:10,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322157746] [2024-06-03 19:55:10,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:10,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:12,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:12,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:12,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322157746] [2024-06-03 19:55:12,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322157746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:12,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:12,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:55:12,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677093474] [2024-06-03 19:55:12,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:12,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:55:12,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:12,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:55:12,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:55:12,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:55:12,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 259 transitions, 3162 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:12,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:12,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:55:12,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:13,323 INFO L124 PetriNetUnfolderBase]: 3453/5394 cut-off events. [2024-06-03 19:55:13,323 INFO L125 PetriNetUnfolderBase]: For 307694/307700 co-relation queries the response was YES. [2024-06-03 19:55:13,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36970 conditions, 5394 events. 3453/5394 cut-off events. For 307694/307700 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 30415 event pairs, 751 based on Foata normal form. 22/5413 useless extension candidates. Maximal degree in co-relation 36871. Up to 4567 conditions per place. [2024-06-03 19:55:13,379 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 223 selfloop transitions, 70 changer transitions 0/296 dead transitions. [2024-06-03 19:55:13,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 296 transitions, 3872 flow [2024-06-03 19:55:13,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:55:13,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:55:13,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-03 19:55:13,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 19:55:13,380 INFO L175 Difference]: Start difference. First operand has 219 places, 259 transitions, 3162 flow. Second operand 9 states and 153 transitions. [2024-06-03 19:55:13,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 296 transitions, 3872 flow [2024-06-03 19:55:13,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 296 transitions, 3707 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-03 19:55:13,801 INFO L231 Difference]: Finished difference. Result has 222 places, 259 transitions, 3156 flow [2024-06-03 19:55:13,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2997, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3156, PETRI_PLACES=222, PETRI_TRANSITIONS=259} [2024-06-03 19:55:13,805 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-03 19:55:13,805 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 259 transitions, 3156 flow [2024-06-03 19:55:13,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:13,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:13,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:13,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 19:55:13,805 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)] === [2024-06-03 19:55:13,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:13,806 INFO L85 PathProgramCache]: Analyzing trace with hash 920545806, now seen corresponding path program 1 times [2024-06-03 19:55:13,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:13,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763904856] [2024-06-03 19:55:13,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:13,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:14,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:14,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:14,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763904856] [2024-06-03 19:55:14,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763904856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:14,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:14,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:55:14,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154255052] [2024-06-03 19:55:14,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:14,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:55:14,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:14,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:55:14,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:55:14,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:55:14,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 259 transitions, 3156 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:14,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:14,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:55:14,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:15,707 INFO L124 PetriNetUnfolderBase]: 3473/5420 cut-off events. [2024-06-03 19:55:15,708 INFO L125 PetriNetUnfolderBase]: For 300728/300736 co-relation queries the response was YES. [2024-06-03 19:55:15,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37152 conditions, 5420 events. 3473/5420 cut-off events. For 300728/300736 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 30581 event pairs, 816 based on Foata normal form. 12/5429 useless extension candidates. Maximal degree in co-relation 37052. Up to 5192 conditions per place. [2024-06-03 19:55:15,762 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 236 selfloop transitions, 56 changer transitions 0/295 dead transitions. [2024-06-03 19:55:15,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 295 transitions, 4028 flow [2024-06-03 19:55:15,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:55:15,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:55:15,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-03 19:55:15,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-03 19:55:15,764 INFO L175 Difference]: Start difference. First operand has 222 places, 259 transitions, 3156 flow. Second operand 8 states and 137 transitions. [2024-06-03 19:55:15,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 295 transitions, 4028 flow [2024-06-03 19:55:16,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 295 transitions, 3864 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-03 19:55:16,239 INFO L231 Difference]: Finished difference. Result has 222 places, 265 transitions, 3200 flow [2024-06-03 19:55:16,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2992, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3200, PETRI_PLACES=222, PETRI_TRANSITIONS=265} [2024-06-03 19:55:16,239 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-03 19:55:16,240 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 265 transitions, 3200 flow [2024-06-03 19:55:16,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:16,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:16,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:16,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 19:55:16,240 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)] === [2024-06-03 19:55:16,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:16,241 INFO L85 PathProgramCache]: Analyzing trace with hash -869972677, now seen corresponding path program 1 times [2024-06-03 19:55:16,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:16,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034978839] [2024-06-03 19:55:16,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:16,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:16,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:16,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:16,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034978839] [2024-06-03 19:55:16,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034978839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:16,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:16,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:55:16,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147187016] [2024-06-03 19:55:16,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:16,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:55:16,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:16,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:55:16,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:55:16,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:55:16,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 265 transitions, 3200 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:16,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:16,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:55:16,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:17,879 INFO L124 PetriNetUnfolderBase]: 3486/5438 cut-off events. [2024-06-03 19:55:17,879 INFO L125 PetriNetUnfolderBase]: For 308109/308117 co-relation queries the response was YES. [2024-06-03 19:55:17,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37557 conditions, 5438 events. 3486/5438 cut-off events. For 308109/308117 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 30725 event pairs, 813 based on Foata normal form. 9/5444 useless extension candidates. Maximal degree in co-relation 37456. Up to 5365 conditions per place. [2024-06-03 19:55:17,934 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 263 selfloop transitions, 26 changer transitions 0/292 dead transitions. [2024-06-03 19:55:17,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 292 transitions, 4032 flow [2024-06-03 19:55:17,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:55:17,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:55:17,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-03 19:55:17,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-03 19:55:17,935 INFO L175 Difference]: Start difference. First operand has 222 places, 265 transitions, 3200 flow. Second operand 7 states and 113 transitions. [2024-06-03 19:55:17,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 292 transitions, 4032 flow [2024-06-03 19:55:18,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 292 transitions, 3944 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-03 19:55:18,312 INFO L231 Difference]: Finished difference. Result has 225 places, 271 transitions, 3256 flow [2024-06-03 19:55:18,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3112, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3256, PETRI_PLACES=225, PETRI_TRANSITIONS=271} [2024-06-03 19:55:18,313 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-03 19:55:18,313 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 271 transitions, 3256 flow [2024-06-03 19:55:18,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:18,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:18,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:18,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 19:55:18,313 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)] === [2024-06-03 19:55:18,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:18,314 INFO L85 PathProgramCache]: Analyzing trace with hash -307524583, now seen corresponding path program 2 times [2024-06-03 19:55:18,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:18,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428321156] [2024-06-03 19:55:18,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:18,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:18,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:18,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:18,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:18,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428321156] [2024-06-03 19:55:18,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428321156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:18,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:18,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:55:18,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18614901] [2024-06-03 19:55:18,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:18,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:55:18,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:18,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:55:18,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:55:19,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:55:19,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 271 transitions, 3256 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:19,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:19,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:55:19,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:19,940 INFO L124 PetriNetUnfolderBase]: 3491/5445 cut-off events. [2024-06-03 19:55:19,941 INFO L125 PetriNetUnfolderBase]: For 318893/318901 co-relation queries the response was YES. [2024-06-03 19:55:19,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37985 conditions, 5445 events. 3491/5445 cut-off events. For 318893/318901 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 30786 event pairs, 815 based on Foata normal form. 9/5451 useless extension candidates. Maximal degree in co-relation 37882. Up to 5392 conditions per place. [2024-06-03 19:55:19,998 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 266 selfloop transitions, 22 changer transitions 0/291 dead transitions. [2024-06-03 19:55:19,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 291 transitions, 3934 flow [2024-06-03 19:55:19,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:55:19,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:55:19,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-03 19:55:19,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37630662020905925 [2024-06-03 19:55:19,999 INFO L175 Difference]: Start difference. First operand has 225 places, 271 transitions, 3256 flow. Second operand 7 states and 108 transitions. [2024-06-03 19:55:20,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 291 transitions, 3934 flow [2024-06-03 19:55:20,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 291 transitions, 3844 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-03 19:55:20,533 INFO L231 Difference]: Finished difference. Result has 229 places, 274 transitions, 3268 flow [2024-06-03 19:55:20,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3184, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3268, PETRI_PLACES=229, PETRI_TRANSITIONS=274} [2024-06-03 19:55:20,534 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-03 19:55:20,534 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 274 transitions, 3268 flow [2024-06-03 19:55:20,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:20,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:20,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:20,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 19:55:20,535 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)] === [2024-06-03 19:55:20,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:20,535 INFO L85 PathProgramCache]: Analyzing trace with hash -307528210, now seen corresponding path program 2 times [2024-06-03 19:55:20,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:20,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466503315] [2024-06-03 19:55:20,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:20,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:21,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:21,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:21,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466503315] [2024-06-03 19:55:21,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466503315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:21,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:21,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:55:21,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950357611] [2024-06-03 19:55:21,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:21,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:55:21,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:21,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:55:21,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:55:21,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:55:21,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 274 transitions, 3268 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:21,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:21,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:55:21,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:22,444 INFO L124 PetriNetUnfolderBase]: 3543/5519 cut-off events. [2024-06-03 19:55:22,445 INFO L125 PetriNetUnfolderBase]: For 340546/340552 co-relation queries the response was YES. [2024-06-03 19:55:22,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38789 conditions, 5519 events. 3543/5519 cut-off events. For 340546/340552 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 31213 event pairs, 825 based on Foata normal form. 10/5526 useless extension candidates. Maximal degree in co-relation 38684. Up to 5257 conditions per place. [2024-06-03 19:55:22,505 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 244 selfloop transitions, 59 changer transitions 0/306 dead transitions. [2024-06-03 19:55:22,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 306 transitions, 4252 flow [2024-06-03 19:55:22,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:55:22,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:55:22,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-03 19:55:22,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 19:55:22,507 INFO L175 Difference]: Start difference. First operand has 229 places, 274 transitions, 3268 flow. Second operand 8 states and 136 transitions. [2024-06-03 19:55:22,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 306 transitions, 4252 flow [2024-06-03 19:55:23,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 306 transitions, 4196 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-03 19:55:23,105 INFO L231 Difference]: Finished difference. Result has 232 places, 280 transitions, 3412 flow [2024-06-03 19:55:23,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3212, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3412, PETRI_PLACES=232, PETRI_TRANSITIONS=280} [2024-06-03 19:55:23,105 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-03 19:55:23,105 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 280 transitions, 3412 flow [2024-06-03 19:55:23,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:23,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:23,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:23,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 19:55:23,106 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)] === [2024-06-03 19:55:23,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:23,107 INFO L85 PathProgramCache]: Analyzing trace with hash -307517050, now seen corresponding path program 3 times [2024-06-03 19:55:23,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:23,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102180038] [2024-06-03 19:55:23,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:23,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:23,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:23,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102180038] [2024-06-03 19:55:23,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102180038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:23,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:23,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:55:23,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996217257] [2024-06-03 19:55:23,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:23,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:55:23,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:23,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:55:23,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:55:23,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:55:23,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 280 transitions, 3412 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:23,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:23,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:55:23,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:25,000 INFO L124 PetriNetUnfolderBase]: 3531/5503 cut-off events. [2024-06-03 19:55:25,000 INFO L125 PetriNetUnfolderBase]: For 345597/345603 co-relation queries the response was YES. [2024-06-03 19:55:25,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38833 conditions, 5503 events. 3531/5503 cut-off events. For 345597/345603 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 31103 event pairs, 823 based on Foata normal form. 10/5510 useless extension candidates. Maximal degree in co-relation 38727. Up to 5249 conditions per place. [2024-06-03 19:55:25,066 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 241 selfloop transitions, 60 changer transitions 0/304 dead transitions. [2024-06-03 19:55:25,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 304 transitions, 4202 flow [2024-06-03 19:55:25,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:55:25,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:55:25,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 19:55:25,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-03 19:55:25,067 INFO L175 Difference]: Start difference. First operand has 232 places, 280 transitions, 3412 flow. Second operand 8 states and 133 transitions. [2024-06-03 19:55:25,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 304 transitions, 4202 flow [2024-06-03 19:55:25,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 304 transitions, 4081 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-03 19:55:25,699 INFO L231 Difference]: Finished difference. Result has 236 places, 280 transitions, 3417 flow [2024-06-03 19:55:25,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3291, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3417, PETRI_PLACES=236, PETRI_TRANSITIONS=280} [2024-06-03 19:55:25,700 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-03 19:55:25,700 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 280 transitions, 3417 flow [2024-06-03 19:55:25,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:25,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:25,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:25,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 19:55:25,700 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)] === [2024-06-03 19:55:25,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:25,701 INFO L85 PathProgramCache]: Analyzing trace with hash 882871321, now seen corresponding path program 3 times [2024-06-03 19:55:25,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:25,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059667467] [2024-06-03 19:55:25,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:25,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:25,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:26,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:26,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:26,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059667467] [2024-06-03 19:55:26,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059667467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:26,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:26,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:55:26,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799617393] [2024-06-03 19:55:26,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:26,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:55:26,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:26,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:55:26,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:55:26,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:55:26,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 280 transitions, 3417 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:26,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:26,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:55:26,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:27,375 INFO L124 PetriNetUnfolderBase]: 3536/5510 cut-off events. [2024-06-03 19:55:27,376 INFO L125 PetriNetUnfolderBase]: For 351550/351574 co-relation queries the response was YES. [2024-06-03 19:55:27,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38969 conditions, 5510 events. 3536/5510 cut-off events. For 351550/351574 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 31165 event pairs, 826 based on Foata normal form. 17/5520 useless extension candidates. Maximal degree in co-relation 38862. Up to 5401 conditions per place. [2024-06-03 19:55:27,431 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 266 selfloop transitions, 42 changer transitions 0/311 dead transitions. [2024-06-03 19:55:27,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 311 transitions, 4451 flow [2024-06-03 19:55:27,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:55:27,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:55:27,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-03 19:55:27,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-03 19:55:27,433 INFO L175 Difference]: Start difference. First operand has 236 places, 280 transitions, 3417 flow. Second operand 7 states and 113 transitions. [2024-06-03 19:55:27,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 311 transitions, 4451 flow [2024-06-03 19:55:27,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 311 transitions, 4323 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 19:55:27,879 INFO L231 Difference]: Finished difference. Result has 237 places, 291 transitions, 3543 flow [2024-06-03 19:55:27,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3289, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3543, PETRI_PLACES=237, PETRI_TRANSITIONS=291} [2024-06-03 19:55:27,880 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-03 19:55:27,880 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 291 transitions, 3543 flow [2024-06-03 19:55:27,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:27,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:27,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:27,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 19:55:27,881 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)] === [2024-06-03 19:55:27,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:27,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1785118813, now seen corresponding path program 4 times [2024-06-03 19:55:27,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:27,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551089412] [2024-06-03 19:55:27,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:27,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:27,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:28,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:28,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:28,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551089412] [2024-06-03 19:55:28,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551089412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:28,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:28,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:55:28,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828567239] [2024-06-03 19:55:28,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:28,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:55:28,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:28,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:55:28,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:55:28,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:55:28,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 291 transitions, 3543 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:28,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:28,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:55:28,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:29,604 INFO L124 PetriNetUnfolderBase]: 3541/5517 cut-off events. [2024-06-03 19:55:29,604 INFO L125 PetriNetUnfolderBase]: For 363242/363266 co-relation queries the response was YES. [2024-06-03 19:55:29,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39435 conditions, 5517 events. 3541/5517 cut-off events. For 363242/363266 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 31226 event pairs, 822 based on Foata normal form. 17/5527 useless extension candidates. Maximal degree in co-relation 39326. Up to 5407 conditions per place. [2024-06-03 19:55:29,657 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 262 selfloop transitions, 46 changer transitions 0/311 dead transitions. [2024-06-03 19:55:29,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 311 transitions, 4390 flow [2024-06-03 19:55:29,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:55:29,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:55:29,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-03 19:55:29,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797909407665505 [2024-06-03 19:55:29,658 INFO L175 Difference]: Start difference. First operand has 237 places, 291 transitions, 3543 flow. Second operand 7 states and 109 transitions. [2024-06-03 19:55:29,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 311 transitions, 4390 flow [2024-06-03 19:55:30,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 311 transitions, 4272 flow, removed 51 selfloop flow, removed 2 redundant places. [2024-06-03 19:55:30,132 INFO L231 Difference]: Finished difference. Result has 242 places, 295 transitions, 3586 flow [2024-06-03 19:55:30,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3453, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3586, PETRI_PLACES=242, PETRI_TRANSITIONS=295} [2024-06-03 19:55:30,133 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-03 19:55:30,133 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 295 transitions, 3586 flow [2024-06-03 19:55:30,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:30,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:30,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:30,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 19:55:30,134 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)] === [2024-06-03 19:55:30,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:30,134 INFO L85 PathProgramCache]: Analyzing trace with hash -37274973, now seen corresponding path program 5 times [2024-06-03 19:55:30,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:30,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749684719] [2024-06-03 19:55:30,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:30,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:30,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:30,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:30,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749684719] [2024-06-03 19:55:30,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749684719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:30,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:30,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:55:30,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306420968] [2024-06-03 19:55:30,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:30,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:55:30,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:30,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:55:30,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:55:30,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:55:30,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 295 transitions, 3586 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:30,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:30,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:55:30,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:31,790 INFO L124 PetriNetUnfolderBase]: 3538/5513 cut-off events. [2024-06-03 19:55:31,790 INFO L125 PetriNetUnfolderBase]: For 370486/370510 co-relation queries the response was YES. [2024-06-03 19:55:31,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39305 conditions, 5513 events. 3538/5513 cut-off events. For 370486/370510 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 31157 event pairs, 821 based on Foata normal form. 17/5523 useless extension candidates. Maximal degree in co-relation 39194. Up to 5448 conditions per place. [2024-06-03 19:55:31,846 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 275 selfloop transitions, 30 changer transitions 0/308 dead transitions. [2024-06-03 19:55:31,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 308 transitions, 4356 flow [2024-06-03 19:55:31,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:55:31,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:55:31,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-03 19:55:31,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3623693379790941 [2024-06-03 19:55:31,847 INFO L175 Difference]: Start difference. First operand has 242 places, 295 transitions, 3586 flow. Second operand 7 states and 104 transitions. [2024-06-03 19:55:31,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 308 transitions, 4356 flow [2024-06-03 19:55:32,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 308 transitions, 4281 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-03 19:55:32,442 INFO L231 Difference]: Finished difference. Result has 246 places, 295 transitions, 3577 flow [2024-06-03 19:55:32,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3511, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3577, PETRI_PLACES=246, PETRI_TRANSITIONS=295} [2024-06-03 19:55:32,443 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-03 19:55:32,443 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 295 transitions, 3577 flow [2024-06-03 19:55:32,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:32,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:32,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:32,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 19:55:32,444 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)] === [2024-06-03 19:55:32,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:32,444 INFO L85 PathProgramCache]: Analyzing trace with hash 2084695065, now seen corresponding path program 6 times [2024-06-03 19:55:32,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:32,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736203033] [2024-06-03 19:55:32,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:32,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:32,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:33,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:33,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:33,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736203033] [2024-06-03 19:55:33,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736203033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:33,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:33,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:55:33,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595125477] [2024-06-03 19:55:33,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:33,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:55:33,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:33,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:55:33,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:55:33,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:55:33,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 295 transitions, 3577 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:33,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:33,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:55:33,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:34,195 INFO L124 PetriNetUnfolderBase]: 3535/5509 cut-off events. [2024-06-03 19:55:34,196 INFO L125 PetriNetUnfolderBase]: For 379563/379587 co-relation queries the response was YES. [2024-06-03 19:55:34,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39363 conditions, 5509 events. 3535/5509 cut-off events. For 379563/379587 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 31126 event pairs, 821 based on Foata normal form. 17/5519 useless extension candidates. Maximal degree in co-relation 39251. Up to 5454 conditions per place. [2024-06-03 19:55:34,258 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 282 selfloop transitions, 22 changer transitions 0/307 dead transitions. [2024-06-03 19:55:34,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 307 transitions, 4225 flow [2024-06-03 19:55:34,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:55:34,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:55:34,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2024-06-03 19:55:34,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3554006968641115 [2024-06-03 19:55:34,260 INFO L175 Difference]: Start difference. First operand has 246 places, 295 transitions, 3577 flow. Second operand 7 states and 102 transitions. [2024-06-03 19:55:34,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 307 transitions, 4225 flow [2024-06-03 19:55:34,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 307 transitions, 4132 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 19:55:34,947 INFO L231 Difference]: Finished difference. Result has 248 places, 295 transitions, 3534 flow [2024-06-03 19:55:34,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3484, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3534, PETRI_PLACES=248, PETRI_TRANSITIONS=295} [2024-06-03 19:55:34,947 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-03 19:55:34,947 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 295 transitions, 3534 flow [2024-06-03 19:55:34,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:34,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:34,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:34,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 19:55:34,948 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:34,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:34,948 INFO L85 PathProgramCache]: Analyzing trace with hash -495401636, now seen corresponding path program 5 times [2024-06-03 19:55:34,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:34,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758095145] [2024-06-03 19:55:34,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:34,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:34,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:36,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:36,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758095145] [2024-06-03 19:55:36,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758095145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:36,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:36,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:55:36,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644377417] [2024-06-03 19:55:36,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:36,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:55:36,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:36,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:55:36,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:55:36,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:55:36,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 295 transitions, 3534 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:36,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:36,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:55:36,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:37,620 INFO L124 PetriNetUnfolderBase]: 3615/5642 cut-off events. [2024-06-03 19:55:37,621 INFO L125 PetriNetUnfolderBase]: For 407613/407634 co-relation queries the response was YES. [2024-06-03 19:55:37,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40215 conditions, 5642 events. 3615/5642 cut-off events. For 407613/407634 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 32113 event pairs, 764 based on Foata normal form. 23/5651 useless extension candidates. Maximal degree in co-relation 40102. Up to 5160 conditions per place. [2024-06-03 19:55:37,682 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 266 selfloop transitions, 71 changer transitions 0/340 dead transitions. [2024-06-03 19:55:37,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 340 transitions, 4429 flow [2024-06-03 19:55:37,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:55:37,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:55:37,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-03 19:55:37,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40487804878048783 [2024-06-03 19:55:37,683 INFO L175 Difference]: Start difference. First operand has 248 places, 295 transitions, 3534 flow. Second operand 10 states and 166 transitions. [2024-06-03 19:55:37,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 340 transitions, 4429 flow [2024-06-03 19:55:38,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 340 transitions, 4370 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 19:55:38,284 INFO L231 Difference]: Finished difference. Result has 253 places, 301 transitions, 3731 flow [2024-06-03 19:55:38,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3475, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3731, PETRI_PLACES=253, PETRI_TRANSITIONS=301} [2024-06-03 19:55:38,285 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-03 19:55:38,285 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 301 transitions, 3731 flow [2024-06-03 19:55:38,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:38,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:38,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:38,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 19:55:38,286 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:38,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:38,286 INFO L85 PathProgramCache]: Analyzing trace with hash -666104066, now seen corresponding path program 6 times [2024-06-03 19:55:38,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:38,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884046620] [2024-06-03 19:55:38,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:38,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:39,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:39,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884046620] [2024-06-03 19:55:39,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884046620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:39,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:39,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:55:39,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54209295] [2024-06-03 19:55:39,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:39,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:55:39,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:39,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:55:39,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:55:39,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:55:39,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 301 transitions, 3731 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:39,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:39,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:55:39,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:41,050 INFO L124 PetriNetUnfolderBase]: 3595/5610 cut-off events. [2024-06-03 19:55:41,050 INFO L125 PetriNetUnfolderBase]: For 406293/406314 co-relation queries the response was YES. [2024-06-03 19:55:41,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39950 conditions, 5610 events. 3595/5610 cut-off events. For 406293/406314 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 31854 event pairs, 735 based on Foata normal form. 23/5619 useless extension candidates. Maximal degree in co-relation 39835. Up to 4890 conditions per place. [2024-06-03 19:55:41,112 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 234 selfloop transitions, 105 changer transitions 0/342 dead transitions. [2024-06-03 19:55:41,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 342 transitions, 4556 flow [2024-06-03 19:55:41,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:55:41,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:55:41,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-03 19:55:41,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121951219512195 [2024-06-03 19:55:41,114 INFO L175 Difference]: Start difference. First operand has 253 places, 301 transitions, 3731 flow. Second operand 10 states and 169 transitions. [2024-06-03 19:55:41,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 342 transitions, 4556 flow [2024-06-03 19:55:41,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 342 transitions, 4341 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-03 19:55:41,862 INFO L231 Difference]: Finished difference. Result has 258 places, 303 transitions, 3764 flow [2024-06-03 19:55:41,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3516, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3764, PETRI_PLACES=258, PETRI_TRANSITIONS=303} [2024-06-03 19:55:41,862 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-03 19:55:41,863 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 303 transitions, 3764 flow [2024-06-03 19:55:41,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:41,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:41,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:41,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 19:55:41,864 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:41,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:41,864 INFO L85 PathProgramCache]: Analyzing trace with hash -666219386, now seen corresponding path program 7 times [2024-06-03 19:55:41,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:41,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159836074] [2024-06-03 19:55:41,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:41,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:41,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:43,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:43,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:43,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159836074] [2024-06-03 19:55:43,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159836074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:43,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:43,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:55:43,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711218056] [2024-06-03 19:55:43,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:43,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:55:43,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:43,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:55:43,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:55:43,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:55:43,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 303 transitions, 3764 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:43,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:43,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:55:43,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:44,404 INFO L124 PetriNetUnfolderBase]: 3575/5578 cut-off events. [2024-06-03 19:55:44,404 INFO L125 PetriNetUnfolderBase]: For 397472/397493 co-relation queries the response was YES. [2024-06-03 19:55:44,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39116 conditions, 5578 events. 3575/5578 cut-off events. For 397472/397493 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 31668 event pairs, 721 based on Foata normal form. 23/5587 useless extension candidates. Maximal degree in co-relation 38999. Up to 5019 conditions per place. [2024-06-03 19:55:44,466 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 262 selfloop transitions, 76 changer transitions 0/341 dead transitions. [2024-06-03 19:55:44,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 341 transitions, 4597 flow [2024-06-03 19:55:44,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:55:44,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:55:44,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-03 19:55:44,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-03 19:55:44,467 INFO L175 Difference]: Start difference. First operand has 258 places, 303 transitions, 3764 flow. Second operand 9 states and 150 transitions. [2024-06-03 19:55:44,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 341 transitions, 4597 flow [2024-06-03 19:55:45,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 341 transitions, 4355 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-03 19:55:45,098 INFO L231 Difference]: Finished difference. Result has 261 places, 307 transitions, 3749 flow [2024-06-03 19:55:45,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3522, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3749, PETRI_PLACES=261, PETRI_TRANSITIONS=307} [2024-06-03 19:55:45,099 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-03 19:55:45,099 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 307 transitions, 3749 flow [2024-06-03 19:55:45,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:45,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:45,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:45,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 19:55:45,099 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:45,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:45,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2012978992, now seen corresponding path program 8 times [2024-06-03 19:55:45,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:45,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35102537] [2024-06-03 19:55:45,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:45,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:45,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:46,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:46,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:46,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35102537] [2024-06-03 19:55:46,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35102537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:46,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:46,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:55:46,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336396565] [2024-06-03 19:55:46,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:46,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:55:46,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:46,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:55:46,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:55:46,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:55:46,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 307 transitions, 3749 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:46,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:46,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:55:46,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:47,392 INFO L124 PetriNetUnfolderBase]: 3555/5546 cut-off events. [2024-06-03 19:55:47,393 INFO L125 PetriNetUnfolderBase]: For 391179/391194 co-relation queries the response was YES. [2024-06-03 19:55:47,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38362 conditions, 5546 events. 3555/5546 cut-off events. For 391179/391194 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 31449 event pairs, 712 based on Foata normal form. 19/5551 useless extension candidates. Maximal degree in co-relation 38244. Up to 5064 conditions per place. [2024-06-03 19:55:47,452 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 263 selfloop transitions, 74 changer transitions 0/340 dead transitions. [2024-06-03 19:55:47,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 340 transitions, 4447 flow [2024-06-03 19:55:47,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:55:47,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:55:47,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-03 19:55:47,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-03 19:55:47,454 INFO L175 Difference]: Start difference. First operand has 261 places, 307 transitions, 3749 flow. Second operand 9 states and 149 transitions. [2024-06-03 19:55:47,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 340 transitions, 4447 flow [2024-06-03 19:55:48,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 340 transitions, 4113 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-03 19:55:48,061 INFO L231 Difference]: Finished difference. Result has 263 places, 306 transitions, 3485 flow [2024-06-03 19:55:48,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3333, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3485, PETRI_PLACES=263, PETRI_TRANSITIONS=306} [2024-06-03 19:55:48,061 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-03 19:55:48,061 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 306 transitions, 3485 flow [2024-06-03 19:55:48,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:48,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:48,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:48,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 19:55:48,062 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)] === [2024-06-03 19:55:48,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:48,062 INFO L85 PathProgramCache]: Analyzing trace with hash 2097589608, now seen corresponding path program 4 times [2024-06-03 19:55:48,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:48,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052386246] [2024-06-03 19:55:48,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:48,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:48,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:48,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:48,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:48,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052386246] [2024-06-03 19:55:48,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052386246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:48,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:48,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:55:48,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71989124] [2024-06-03 19:55:48,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:48,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:55:48,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:48,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:55:48,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:55:48,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:55:48,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 306 transitions, 3485 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:48,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:48,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:55:48,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:49,900 INFO L124 PetriNetUnfolderBase]: 3575/5573 cut-off events. [2024-06-03 19:55:49,900 INFO L125 PetriNetUnfolderBase]: For 386718/386718 co-relation queries the response was YES. [2024-06-03 19:55:49,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37635 conditions, 5573 events. 3575/5573 cut-off events. For 386718/386718 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 31616 event pairs, 822 based on Foata normal form. 4/5574 useless extension candidates. Maximal degree in co-relation 37517. Up to 5517 conditions per place. [2024-06-03 19:55:49,962 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 301 selfloop transitions, 19 changer transitions 0/323 dead transitions. [2024-06-03 19:55:49,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 323 transitions, 4208 flow [2024-06-03 19:55:49,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:55:49,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:55:49,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2024-06-03 19:55:49,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3475609756097561 [2024-06-03 19:55:49,963 INFO L175 Difference]: Start difference. First operand has 263 places, 306 transitions, 3485 flow. Second operand 8 states and 114 transitions. [2024-06-03 19:55:49,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 323 transitions, 4208 flow [2024-06-03 19:55:50,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 323 transitions, 4049 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 19:55:50,553 INFO L231 Difference]: Finished difference. Result has 265 places, 309 transitions, 3417 flow [2024-06-03 19:55:50,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3326, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3417, PETRI_PLACES=265, PETRI_TRANSITIONS=309} [2024-06-03 19:55:50,553 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-03 19:55:50,553 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 309 transitions, 3417 flow [2024-06-03 19:55:50,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:50,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:50,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:50,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 19:55:50,554 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)] === [2024-06-03 19:55:50,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:50,554 INFO L85 PathProgramCache]: Analyzing trace with hash 2084702598, now seen corresponding path program 5 times [2024-06-03 19:55:50,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:50,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811698306] [2024-06-03 19:55:50,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:50,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:51,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:51,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:51,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811698306] [2024-06-03 19:55:51,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811698306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:51,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:51,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:55:51,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069114365] [2024-06-03 19:55:51,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:51,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:55:51,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:51,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:55:51,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:55:51,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:55:51,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 309 transitions, 3417 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:51,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:51,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:55:51,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:52,697 INFO L124 PetriNetUnfolderBase]: 3595/5602 cut-off events. [2024-06-03 19:55:52,697 INFO L125 PetriNetUnfolderBase]: For 397284/397299 co-relation queries the response was YES. [2024-06-03 19:55:52,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37640 conditions, 5602 events. 3595/5602 cut-off events. For 397284/397299 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 31769 event pairs, 815 based on Foata normal form. 11/5599 useless extension candidates. Maximal degree in co-relation 37521. Up to 5321 conditions per place. [2024-06-03 19:55:52,761 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 264 selfloop transitions, 65 changer transitions 0/332 dead transitions. [2024-06-03 19:55:52,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 332 transitions, 4318 flow [2024-06-03 19:55:52,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:55:52,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:55:52,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 19:55:52,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 19:55:52,771 INFO L175 Difference]: Start difference. First operand has 265 places, 309 transitions, 3417 flow. Second operand 8 states and 128 transitions. [2024-06-03 19:55:52,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 332 transitions, 4318 flow [2024-06-03 19:55:53,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 332 transitions, 4258 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 19:55:53,514 INFO L231 Difference]: Finished difference. Result has 267 places, 312 transitions, 3540 flow [2024-06-03 19:55:53,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3357, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3540, PETRI_PLACES=267, PETRI_TRANSITIONS=312} [2024-06-03 19:55:53,515 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 225 predicate places. [2024-06-03 19:55:53,515 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 312 transitions, 3540 flow [2024-06-03 19:55:53,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:53,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:53,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:53,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 19:55:53,516 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)] === [2024-06-03 19:55:53,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:53,516 INFO L85 PathProgramCache]: Analyzing trace with hash 2084691438, now seen corresponding path program 6 times [2024-06-03 19:55:53,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:53,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597748704] [2024-06-03 19:55:53,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:53,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:53,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:54,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:54,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:54,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597748704] [2024-06-03 19:55:54,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597748704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:54,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:54,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:55:54,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312548619] [2024-06-03 19:55:54,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:54,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:55:54,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:54,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:55:54,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:55:54,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:55:54,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 312 transitions, 3540 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:54,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:54,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:55:54,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:55,448 INFO L124 PetriNetUnfolderBase]: 3583/5586 cut-off events. [2024-06-03 19:55:55,449 INFO L125 PetriNetUnfolderBase]: For 399922/399937 co-relation queries the response was YES. [2024-06-03 19:55:55,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37572 conditions, 5586 events. 3583/5586 cut-off events. For 399922/399937 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 31658 event pairs, 809 based on Foata normal form. 11/5583 useless extension candidates. Maximal degree in co-relation 37452. Up to 5313 conditions per place. [2024-06-03 19:55:55,508 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 261 selfloop transitions, 66 changer transitions 0/330 dead transitions. [2024-06-03 19:55:55,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 330 transitions, 4252 flow [2024-06-03 19:55:55,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:55:55,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:55:55,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-03 19:55:55,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-03 19:55:55,510 INFO L175 Difference]: Start difference. First operand has 267 places, 312 transitions, 3540 flow. Second operand 8 states and 125 transitions. [2024-06-03 19:55:55,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 330 transitions, 4252 flow [2024-06-03 19:55:56,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 330 transitions, 4031 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-03 19:55:56,314 INFO L231 Difference]: Finished difference. Result has 269 places, 312 transitions, 3457 flow [2024-06-03 19:55:56,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3319, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3457, PETRI_PLACES=269, PETRI_TRANSITIONS=312} [2024-06-03 19:55:56,314 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-03 19:55:56,314 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 312 transitions, 3457 flow [2024-06-03 19:55:56,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:56,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:56,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:56,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 19:55:56,315 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)] === [2024-06-03 19:55:56,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:56,316 INFO L85 PathProgramCache]: Analyzing trace with hash 890497817, now seen corresponding path program 1 times [2024-06-03 19:55:56,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:56,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934137073] [2024-06-03 19:55:56,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:56,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:57,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:57,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:57,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934137073] [2024-06-03 19:55:57,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934137073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:57,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:57,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:55:57,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551319329] [2024-06-03 19:55:57,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:57,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:55:57,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:57,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:55:57,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:55:57,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:57,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 312 transitions, 3457 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:57,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:57,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:57,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:58,395 INFO L124 PetriNetUnfolderBase]: 3480/5488 cut-off events. [2024-06-03 19:55:58,395 INFO L125 PetriNetUnfolderBase]: For 343341/343357 co-relation queries the response was YES. [2024-06-03 19:55:58,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35453 conditions, 5488 events. 3480/5488 cut-off events. For 343341/343357 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 31885 event pairs, 757 based on Foata normal form. 2/5464 useless extension candidates. Maximal degree in co-relation 35332. Up to 5321 conditions per place. [2024-06-03 19:55:58,457 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 302 selfloop transitions, 23 changer transitions 0/343 dead transitions. [2024-06-03 19:55:58,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 343 transitions, 4399 flow [2024-06-03 19:55:58,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:55:58,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:55:58,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-03 19:55:58,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-03 19:55:58,458 INFO L175 Difference]: Start difference. First operand has 269 places, 312 transitions, 3457 flow. Second operand 9 states and 143 transitions. [2024-06-03 19:55:58,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 343 transitions, 4399 flow [2024-06-03 19:55:59,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 343 transitions, 4222 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 19:55:59,153 INFO L231 Difference]: Finished difference. Result has 270 places, 318 transitions, 3418 flow [2024-06-03 19:55:59,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3280, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3418, PETRI_PLACES=270, PETRI_TRANSITIONS=318} [2024-06-03 19:55:59,154 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-03 19:55:59,155 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 318 transitions, 3418 flow [2024-06-03 19:55:59,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:59,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:59,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:59,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 19:55:59,155 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)] === [2024-06-03 19:55:59,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:59,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1640859791, now seen corresponding path program 2 times [2024-06-03 19:55:59,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:59,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678021737] [2024-06-03 19:55:59,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:59,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:59,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:00,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:00,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:00,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678021737] [2024-06-03 19:56:00,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678021737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:00,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:00,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:56:00,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155286052] [2024-06-03 19:56:00,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:00,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:56:00,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:00,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:56:00,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:56:00,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:00,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 318 transitions, 3418 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:00,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:00,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:00,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:01,154 INFO L124 PetriNetUnfolderBase]: 3474/5480 cut-off events. [2024-06-03 19:56:01,154 INFO L125 PetriNetUnfolderBase]: For 348026/348042 co-relation queries the response was YES. [2024-06-03 19:56:01,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35615 conditions, 5480 events. 3474/5480 cut-off events. For 348026/348042 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 31833 event pairs, 757 based on Foata normal form. 2/5456 useless extension candidates. Maximal degree in co-relation 35493. Up to 5331 conditions per place. [2024-06-03 19:56:01,213 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 302 selfloop transitions, 17 changer transitions 0/337 dead transitions. [2024-06-03 19:56:01,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 337 transitions, 4114 flow [2024-06-03 19:56:01,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:56:01,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:56:01,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-03 19:56:01,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-03 19:56:01,214 INFO L175 Difference]: Start difference. First operand has 270 places, 318 transitions, 3418 flow. Second operand 8 states and 125 transitions. [2024-06-03 19:56:01,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 337 transitions, 4114 flow [2024-06-03 19:56:01,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 337 transitions, 4034 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-03 19:56:01,742 INFO L231 Difference]: Finished difference. Result has 273 places, 318 transitions, 3378 flow [2024-06-03 19:56:01,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3338, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3378, PETRI_PLACES=273, PETRI_TRANSITIONS=318} [2024-06-03 19:56:01,742 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-03 19:56:01,742 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 318 transitions, 3378 flow [2024-06-03 19:56:01,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:01,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:01,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:01,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 19:56:01,743 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)] === [2024-06-03 19:56:01,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:01,743 INFO L85 PathProgramCache]: Analyzing trace with hash 894307097, now seen corresponding path program 3 times [2024-06-03 19:56:01,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:01,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927605507] [2024-06-03 19:56:01,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:01,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:02,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:02,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:02,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927605507] [2024-06-03 19:56:02,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927605507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:02,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:02,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:56:02,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102333665] [2024-06-03 19:56:02,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:02,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:56:02,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:02,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:56:02,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:56:02,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:02,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 318 transitions, 3378 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:02,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:02,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:02,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:03,730 INFO L124 PetriNetUnfolderBase]: 3481/5490 cut-off events. [2024-06-03 19:56:03,730 INFO L125 PetriNetUnfolderBase]: For 359026/359042 co-relation queries the response was YES. [2024-06-03 19:56:03,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35788 conditions, 5490 events. 3481/5490 cut-off events. For 359026/359042 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 31963 event pairs, 757 based on Foata normal form. 2/5463 useless extension candidates. Maximal degree in co-relation 35664. Up to 5291 conditions per place. [2024-06-03 19:56:03,788 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 287 selfloop transitions, 39 changer transitions 0/344 dead transitions. [2024-06-03 19:56:03,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 344 transitions, 4356 flow [2024-06-03 19:56:03,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:56:03,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:56:03,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-03 19:56:03,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-03 19:56:03,789 INFO L175 Difference]: Start difference. First operand has 273 places, 318 transitions, 3378 flow. Second operand 8 states and 130 transitions. [2024-06-03 19:56:03,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 344 transitions, 4356 flow [2024-06-03 19:56:04,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 344 transitions, 4312 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-03 19:56:04,300 INFO L231 Difference]: Finished difference. Result has 275 places, 324 transitions, 3556 flow [2024-06-03 19:56:04,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3334, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3556, PETRI_PLACES=275, PETRI_TRANSITIONS=324} [2024-06-03 19:56:04,301 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-03 19:56:04,301 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 324 transitions, 3556 flow [2024-06-03 19:56:04,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:04,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:04,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:04,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 19:56:04,301 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)] === [2024-06-03 19:56:04,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:04,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1082662301, now seen corresponding path program 1 times [2024-06-03 19:56:04,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:04,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743625737] [2024-06-03 19:56:04,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:04,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:04,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:05,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:05,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:05,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743625737] [2024-06-03 19:56:05,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743625737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:05,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:05,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:56:05,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794056023] [2024-06-03 19:56:05,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:05,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:56:05,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:05,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:56:05,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:56:05,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:56:05,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 324 transitions, 3556 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:05,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:05,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:56:05,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:06,487 INFO L124 PetriNetUnfolderBase]: 3635/5658 cut-off events. [2024-06-03 19:56:06,487 INFO L125 PetriNetUnfolderBase]: For 437973/437973 co-relation queries the response was YES. [2024-06-03 19:56:06,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39181 conditions, 5658 events. 3635/5658 cut-off events. For 437973/437973 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 32150 event pairs, 829 based on Foata normal form. 1/5656 useless extension candidates. Maximal degree in co-relation 39055. Up to 5617 conditions per place. [2024-06-03 19:56:06,540 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 319 selfloop transitions, 19 changer transitions 0/341 dead transitions. [2024-06-03 19:56:06,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 341 transitions, 4353 flow [2024-06-03 19:56:06,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:56:06,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:56:06,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2024-06-03 19:56:06,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519163763066202 [2024-06-03 19:56:06,542 INFO L175 Difference]: Start difference. First operand has 275 places, 324 transitions, 3556 flow. Second operand 7 states and 101 transitions. [2024-06-03 19:56:06,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 341 transitions, 4353 flow [2024-06-03 19:56:07,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 341 transitions, 4278 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-03 19:56:07,234 INFO L231 Difference]: Finished difference. Result has 278 places, 330 transitions, 3630 flow [2024-06-03 19:56:07,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3485, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3630, PETRI_PLACES=278, PETRI_TRANSITIONS=330} [2024-06-03 19:56:07,234 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-03 19:56:07,234 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 330 transitions, 3630 flow [2024-06-03 19:56:07,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:07,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:07,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:07,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 19:56:07,235 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)] === [2024-06-03 19:56:07,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:07,235 INFO L85 PathProgramCache]: Analyzing trace with hash 2090416921, now seen corresponding path program 4 times [2024-06-03 19:56:07,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:07,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999046616] [2024-06-03 19:56:07,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:07,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:08,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:08,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999046616] [2024-06-03 19:56:08,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999046616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:08,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:08,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:56:08,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227812659] [2024-06-03 19:56:08,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:08,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:56:08,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:08,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:56:08,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:56:08,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:08,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 330 transitions, 3630 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:08,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:08,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:08,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:09,221 INFO L124 PetriNetUnfolderBase]: 3484/5495 cut-off events. [2024-06-03 19:56:09,221 INFO L125 PetriNetUnfolderBase]: For 374876/374892 co-relation queries the response was YES. [2024-06-03 19:56:09,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36517 conditions, 5495 events. 3484/5495 cut-off events. For 374876/374892 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 31965 event pairs, 756 based on Foata normal form. 3/5472 useless extension candidates. Maximal degree in co-relation 36389. Up to 5337 conditions per place. [2024-06-03 19:56:09,288 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 305 selfloop transitions, 24 changer transitions 0/347 dead transitions. [2024-06-03 19:56:09,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 347 transitions, 4382 flow [2024-06-03 19:56:09,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:56:09,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:56:09,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-03 19:56:09,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-03 19:56:09,290 INFO L175 Difference]: Start difference. First operand has 278 places, 330 transitions, 3630 flow. Second operand 8 states and 120 transitions. [2024-06-03 19:56:09,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 347 transitions, 4382 flow [2024-06-03 19:56:10,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 347 transitions, 4314 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-03 19:56:10,178 INFO L231 Difference]: Finished difference. Result has 281 places, 333 transitions, 3674 flow [2024-06-03 19:56:10,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3562, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3674, PETRI_PLACES=281, PETRI_TRANSITIONS=333} [2024-06-03 19:56:10,179 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-03 19:56:10,179 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 333 transitions, 3674 flow [2024-06-03 19:56:10,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:10,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:10,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:10,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 19:56:10,179 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)] === [2024-06-03 19:56:10,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:10,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1810627875, now seen corresponding path program 1 times [2024-06-03 19:56:10,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:10,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482947217] [2024-06-03 19:56:10,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:10,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:10,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:10,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:10,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:10,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482947217] [2024-06-03 19:56:10,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482947217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:10,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:10,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:56:10,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134449025] [2024-06-03 19:56:10,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:10,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:56:10,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:10,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:56:10,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:56:10,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:56:10,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 333 transitions, 3674 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:10,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:10,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:56:10,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:12,006 INFO L124 PetriNetUnfolderBase]: 3660/5690 cut-off events. [2024-06-03 19:56:12,006 INFO L125 PetriNetUnfolderBase]: For 462959/462971 co-relation queries the response was YES. [2024-06-03 19:56:12,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40159 conditions, 5690 events. 3660/5690 cut-off events. For 462959/462971 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 32402 event pairs, 780 based on Foata normal form. 14/5701 useless extension candidates. Maximal degree in co-relation 40030. Up to 5494 conditions per place. [2024-06-03 19:56:12,074 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 320 selfloop transitions, 52 changer transitions 0/375 dead transitions. [2024-06-03 19:56:12,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 375 transitions, 4777 flow [2024-06-03 19:56:12,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:56:12,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:56:12,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 19:56:12,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-03 19:56:12,075 INFO L175 Difference]: Start difference. First operand has 281 places, 333 transitions, 3674 flow. Second operand 8 states and 133 transitions. [2024-06-03 19:56:12,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 375 transitions, 4777 flow [2024-06-03 19:56:12,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 375 transitions, 4687 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-03 19:56:12,824 INFO L231 Difference]: Finished difference. Result has 284 places, 346 transitions, 3836 flow [2024-06-03 19:56:12,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3584, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3836, PETRI_PLACES=284, PETRI_TRANSITIONS=346} [2024-06-03 19:56:12,825 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-03 19:56:12,825 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 346 transitions, 3836 flow [2024-06-03 19:56:12,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:12,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:12,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:12,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 19:56:12,826 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)] === [2024-06-03 19:56:12,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:12,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1230333817, now seen corresponding path program 2 times [2024-06-03 19:56:12,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:12,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402857857] [2024-06-03 19:56:12,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:12,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:12,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:13,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:13,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:13,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402857857] [2024-06-03 19:56:13,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402857857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:13,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:13,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:56:13,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539559975] [2024-06-03 19:56:13,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:13,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:56:13,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:13,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:56:13,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:56:13,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:56:13,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 346 transitions, 3836 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:13,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:13,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:56:13,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:14,682 INFO L124 PetriNetUnfolderBase]: 3670/5704 cut-off events. [2024-06-03 19:56:14,683 INFO L125 PetriNetUnfolderBase]: For 477667/477679 co-relation queries the response was YES. [2024-06-03 19:56:14,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41210 conditions, 5704 events. 3670/5704 cut-off events. For 477667/477679 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 32436 event pairs, 798 based on Foata normal form. 14/5715 useless extension candidates. Maximal degree in co-relation 41079. Up to 5551 conditions per place. [2024-06-03 19:56:14,749 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 321 selfloop transitions, 50 changer transitions 0/374 dead transitions. [2024-06-03 19:56:14,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 374 transitions, 4709 flow [2024-06-03 19:56:14,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:56:14,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:56:14,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-03 19:56:14,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-03 19:56:14,751 INFO L175 Difference]: Start difference. First operand has 284 places, 346 transitions, 3836 flow. Second operand 8 states and 127 transitions. [2024-06-03 19:56:14,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 374 transitions, 4709 flow [2024-06-03 19:56:15,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 374 transitions, 4621 flow, removed 40 selfloop flow, removed 2 redundant places. [2024-06-03 19:56:15,585 INFO L231 Difference]: Finished difference. Result has 290 places, 350 transitions, 3913 flow [2024-06-03 19:56:15,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3772, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3913, PETRI_PLACES=290, PETRI_TRANSITIONS=350} [2024-06-03 19:56:15,586 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-03 19:56:15,586 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 350 transitions, 3913 flow [2024-06-03 19:56:15,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:15,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:15,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:15,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 19:56:15,587 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)] === [2024-06-03 19:56:15,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:15,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1813487811, now seen corresponding path program 1 times [2024-06-03 19:56:15,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:15,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682922081] [2024-06-03 19:56:15,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:15,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:15,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:16,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:16,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:16,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682922081] [2024-06-03 19:56:16,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682922081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:16,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:16,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:56:16,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326638378] [2024-06-03 19:56:16,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:16,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:56:16,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:16,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:56:16,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:56:16,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:56:16,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 350 transitions, 3913 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:16,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:16,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:56:16,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:17,881 INFO L124 PetriNetUnfolderBase]: 3678/5715 cut-off events. [2024-06-03 19:56:17,881 INFO L125 PetriNetUnfolderBase]: For 489020/489028 co-relation queries the response was YES. [2024-06-03 19:56:17,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41182 conditions, 5715 events. 3678/5715 cut-off events. For 489020/489028 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 32363 event pairs, 674 based on Foata normal form. 10/5722 useless extension candidates. Maximal degree in co-relation 41049. Up to 5486 conditions per place. [2024-06-03 19:56:17,943 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 331 selfloop transitions, 49 changer transitions 0/383 dead transitions. [2024-06-03 19:56:17,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 383 transitions, 4977 flow [2024-06-03 19:56:17,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:56:17,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:56:17,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-03 19:56:17,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-03 19:56:17,945 INFO L175 Difference]: Start difference. First operand has 290 places, 350 transitions, 3913 flow. Second operand 8 states and 131 transitions. [2024-06-03 19:56:17,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 383 transitions, 4977 flow [2024-06-03 19:56:19,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 383 transitions, 4875 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 19:56:19,291 INFO L231 Difference]: Finished difference. Result has 293 places, 354 transitions, 3983 flow [2024-06-03 19:56:19,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3811, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3983, PETRI_PLACES=293, PETRI_TRANSITIONS=354} [2024-06-03 19:56:19,292 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-03 19:56:19,292 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 354 transitions, 3983 flow [2024-06-03 19:56:19,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:19,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:19,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:19,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 19:56:19,293 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)] === [2024-06-03 19:56:19,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:19,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1813248801, now seen corresponding path program 2 times [2024-06-03 19:56:19,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:19,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708099917] [2024-06-03 19:56:19,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:19,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:20,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:20,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:20,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708099917] [2024-06-03 19:56:20,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708099917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:20,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:20,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:56:20,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818656514] [2024-06-03 19:56:20,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:20,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:56:20,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:20,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:56:20,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:56:20,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:56:20,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 354 transitions, 3983 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:20,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:20,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:56:20,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:21,587 INFO L124 PetriNetUnfolderBase]: 3686/5727 cut-off events. [2024-06-03 19:56:21,587 INFO L125 PetriNetUnfolderBase]: For 502280/502288 co-relation queries the response was YES. [2024-06-03 19:56:21,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41571 conditions, 5727 events. 3686/5727 cut-off events. For 502280/502288 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 32587 event pairs, 798 based on Foata normal form. 10/5734 useless extension candidates. Maximal degree in co-relation 41437. Up to 5575 conditions per place. [2024-06-03 19:56:21,688 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 328 selfloop transitions, 49 changer transitions 0/380 dead transitions. [2024-06-03 19:56:21,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 380 transitions, 4849 flow [2024-06-03 19:56:21,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:56:21,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:56:21,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-03 19:56:21,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-03 19:56:21,690 INFO L175 Difference]: Start difference. First operand has 293 places, 354 transitions, 3983 flow. Second operand 8 states and 127 transitions. [2024-06-03 19:56:21,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 380 transitions, 4849 flow [2024-06-03 19:56:23,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 380 transitions, 4741 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-03 19:56:23,354 INFO L231 Difference]: Finished difference. Result has 297 places, 356 transitions, 4018 flow [2024-06-03 19:56:23,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3891, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4018, PETRI_PLACES=297, PETRI_TRANSITIONS=356} [2024-06-03 19:56:23,354 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-03 19:56:23,355 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 356 transitions, 4018 flow [2024-06-03 19:56:23,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:23,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:23,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:23,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 19:56:23,355 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)] === [2024-06-03 19:56:23,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:23,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1120756567, now seen corresponding path program 3 times [2024-06-03 19:56:23,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:23,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86564358] [2024-06-03 19:56:23,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:23,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:23,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:24,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:24,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:24,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86564358] [2024-06-03 19:56:24,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86564358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:24,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:24,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:56:24,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630734775] [2024-06-03 19:56:24,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:24,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:56:24,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:24,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:56:24,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:56:24,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:56:24,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 356 transitions, 4018 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:24,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:24,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:56:24,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:25,290 INFO L124 PetriNetUnfolderBase]: 3720/5776 cut-off events. [2024-06-03 19:56:25,290 INFO L125 PetriNetUnfolderBase]: For 523992/523996 co-relation queries the response was YES. [2024-06-03 19:56:25,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42306 conditions, 5776 events. 3720/5776 cut-off events. For 523992/523996 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 32919 event pairs, 769 based on Foata normal form. 6/5779 useless extension candidates. Maximal degree in co-relation 42170. Up to 5484 conditions per place. [2024-06-03 19:56:25,365 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 316 selfloop transitions, 73 changer transitions 0/392 dead transitions. [2024-06-03 19:56:25,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 392 transitions, 5324 flow [2024-06-03 19:56:25,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:56:25,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:56:25,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-03 19:56:25,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-03 19:56:25,366 INFO L175 Difference]: Start difference. First operand has 297 places, 356 transitions, 4018 flow. Second operand 8 states and 134 transitions. [2024-06-03 19:56:25,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 392 transitions, 5324 flow [2024-06-03 19:56:26,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 392 transitions, 5217 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-03 19:56:26,234 INFO L231 Difference]: Finished difference. Result has 299 places, 365 transitions, 4207 flow [2024-06-03 19:56:26,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3911, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4207, PETRI_PLACES=299, PETRI_TRANSITIONS=365} [2024-06-03 19:56:26,234 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 257 predicate places. [2024-06-03 19:56:26,234 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 365 transitions, 4207 flow [2024-06-03 19:56:26,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:26,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:26,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:26,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 19:56:26,235 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)] === [2024-06-03 19:56:26,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:26,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1976581107, now seen corresponding path program 1 times [2024-06-03 19:56:26,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:26,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741524438] [2024-06-03 19:56:26,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:26,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:26,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:26,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:26,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741524438] [2024-06-03 19:56:26,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741524438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:26,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:26,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:56:26,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417001650] [2024-06-03 19:56:26,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:26,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:56:26,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:26,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:56:26,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:56:27,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:56:27,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 365 transitions, 4207 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:27,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:27,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:56:27,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:28,225 INFO L124 PetriNetUnfolderBase]: 3725/5781 cut-off events. [2024-06-03 19:56:28,226 INFO L125 PetriNetUnfolderBase]: For 536513/536521 co-relation queries the response was YES. [2024-06-03 19:56:28,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43016 conditions, 5781 events. 3725/5781 cut-off events. For 536513/536521 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 32944 event pairs, 802 based on Foata normal form. 9/5787 useless extension candidates. Maximal degree in co-relation 42879. Up to 5716 conditions per place. [2024-06-03 19:56:28,305 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 369 selfloop transitions, 20 changer transitions 0/392 dead transitions. [2024-06-03 19:56:28,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 392 transitions, 5131 flow [2024-06-03 19:56:28,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:56:28,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:56:28,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-03 19:56:28,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3719512195121951 [2024-06-03 19:56:28,306 INFO L175 Difference]: Start difference. First operand has 299 places, 365 transitions, 4207 flow. Second operand 8 states and 122 transitions. [2024-06-03 19:56:28,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 392 transitions, 5131 flow [2024-06-03 19:56:29,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 392 transitions, 4977 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-03 19:56:29,365 INFO L231 Difference]: Finished difference. Result has 303 places, 368 transitions, 4173 flow [2024-06-03 19:56:29,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4055, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4173, PETRI_PLACES=303, PETRI_TRANSITIONS=368} [2024-06-03 19:56:29,365 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-03 19:56:29,366 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 368 transitions, 4173 flow [2024-06-03 19:56:29,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:29,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:29,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:29,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 19:56:29,366 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)] === [2024-06-03 19:56:29,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:29,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1120457851, now seen corresponding path program 2 times [2024-06-03 19:56:29,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:29,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135483529] [2024-06-03 19:56:29,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:29,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:30,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:30,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:30,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135483529] [2024-06-03 19:56:30,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135483529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:30,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:30,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:56:30,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089100893] [2024-06-03 19:56:30,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:30,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:56:30,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:30,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:56:30,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:56:30,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:56:30,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 368 transitions, 4173 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:30,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:30,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:56:30,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:31,256 INFO L124 PetriNetUnfolderBase]: 3738/5799 cut-off events. [2024-06-03 19:56:31,256 INFO L125 PetriNetUnfolderBase]: For 548735/548743 co-relation queries the response was YES. [2024-06-03 19:56:31,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43078 conditions, 5799 events. 3738/5799 cut-off events. For 548735/548743 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 33036 event pairs, 803 based on Foata normal form. 9/5805 useless extension candidates. Maximal degree in co-relation 42940. Up to 5705 conditions per place. [2024-06-03 19:56:31,325 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 355 selfloop transitions, 38 changer transitions 0/396 dead transitions. [2024-06-03 19:56:31,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 396 transitions, 5331 flow [2024-06-03 19:56:31,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:56:31,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:56:31,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-03 19:56:31,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-03 19:56:31,327 INFO L175 Difference]: Start difference. First operand has 303 places, 368 transitions, 4173 flow. Second operand 8 states and 125 transitions. [2024-06-03 19:56:31,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 396 transitions, 5331 flow [2024-06-03 19:56:32,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 396 transitions, 5235 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-03 19:56:32,069 INFO L231 Difference]: Finished difference. Result has 305 places, 374 transitions, 4309 flow [2024-06-03 19:56:32,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4077, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4309, PETRI_PLACES=305, PETRI_TRANSITIONS=374} [2024-06-03 19:56:32,070 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-03 19:56:32,070 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 374 transitions, 4309 flow [2024-06-03 19:56:32,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:32,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:32,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:32,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 19:56:32,070 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)] === [2024-06-03 19:56:32,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:32,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1120458037, now seen corresponding path program 4 times [2024-06-03 19:56:32,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:32,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954889625] [2024-06-03 19:56:32,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:32,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:32,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:32,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:32,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954889625] [2024-06-03 19:56:32,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954889625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:32,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:32,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:56:32,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650925232] [2024-06-03 19:56:32,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:32,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:56:32,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:32,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:56:32,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:56:32,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:56:32,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 374 transitions, 4309 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:32,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:32,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:56:32,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:34,124 INFO L124 PetriNetUnfolderBase]: 3756/5826 cut-off events. [2024-06-03 19:56:34,125 INFO L125 PetriNetUnfolderBase]: For 570333/570337 co-relation queries the response was YES. [2024-06-03 19:56:34,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43675 conditions, 5826 events. 3756/5826 cut-off events. For 570333/570337 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 33220 event pairs, 766 based on Foata normal form. 6/5829 useless extension candidates. Maximal degree in co-relation 43536. Up to 5528 conditions per place. [2024-06-03 19:56:34,184 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 322 selfloop transitions, 79 changer transitions 0/404 dead transitions. [2024-06-03 19:56:34,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 404 transitions, 5557 flow [2024-06-03 19:56:34,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:56:34,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:56:34,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-03 19:56:34,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-03 19:56:34,185 INFO L175 Difference]: Start difference. First operand has 305 places, 374 transitions, 4309 flow. Second operand 8 states and 131 transitions. [2024-06-03 19:56:34,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 404 transitions, 5557 flow [2024-06-03 19:56:35,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 404 transitions, 5447 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-03 19:56:35,081 INFO L231 Difference]: Finished difference. Result has 309 places, 380 transitions, 4417 flow [2024-06-03 19:56:35,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4199, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4417, PETRI_PLACES=309, PETRI_TRANSITIONS=380} [2024-06-03 19:56:35,082 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-03 19:56:35,082 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 380 transitions, 4417 flow [2024-06-03 19:56:35,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:35,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:35,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:35,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 19:56:35,082 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)] === [2024-06-03 19:56:35,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:35,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1120457665, now seen corresponding path program 1 times [2024-06-03 19:56:35,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:35,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215081392] [2024-06-03 19:56:35,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:35,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:35,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:35,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:35,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215081392] [2024-06-03 19:56:35,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215081392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:35,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:35,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:56:35,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54732205] [2024-06-03 19:56:35,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:35,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:56:35,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:35,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:56:35,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:56:35,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:56:35,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 380 transitions, 4417 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:35,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:35,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:56:35,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:37,023 INFO L124 PetriNetUnfolderBase]: 3782/5860 cut-off events. [2024-06-03 19:56:37,023 INFO L125 PetriNetUnfolderBase]: For 591100/591108 co-relation queries the response was YES. [2024-06-03 19:56:37,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44516 conditions, 5860 events. 3782/5860 cut-off events. For 591100/591108 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 33375 event pairs, 797 based on Foata normal form. 10/5867 useless extension candidates. Maximal degree in co-relation 44375. Up to 5752 conditions per place. [2024-06-03 19:56:37,101 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 374 selfloop transitions, 40 changer transitions 0/417 dead transitions. [2024-06-03 19:56:37,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 417 transitions, 5660 flow [2024-06-03 19:56:37,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:56:37,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:56:37,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 19:56:37,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 19:56:37,103 INFO L175 Difference]: Start difference. First operand has 309 places, 380 transitions, 4417 flow. Second operand 8 states and 128 transitions. [2024-06-03 19:56:37,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 417 transitions, 5660 flow [2024-06-03 19:56:38,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 417 transitions, 5551 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-03 19:56:38,270 INFO L231 Difference]: Finished difference. Result has 314 places, 393 transitions, 4607 flow [2024-06-03 19:56:38,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4308, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4607, PETRI_PLACES=314, PETRI_TRANSITIONS=393} [2024-06-03 19:56:38,270 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-03 19:56:38,270 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 393 transitions, 4607 flow [2024-06-03 19:56:38,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:38,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:38,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:38,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 19:56:38,271 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)] === [2024-06-03 19:56:38,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:38,271 INFO L85 PathProgramCache]: Analyzing trace with hash -943088995, now seen corresponding path program 2 times [2024-06-03 19:56:38,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:38,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199406778] [2024-06-03 19:56:38,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:38,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:38,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:38,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:38,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:38,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199406778] [2024-06-03 19:56:38,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199406778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:38,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:38,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:56:38,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830399970] [2024-06-03 19:56:38,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:38,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:56:38,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:38,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:56:38,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:56:39,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:56:39,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 393 transitions, 4607 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:39,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:39,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:56:39,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:40,229 INFO L124 PetriNetUnfolderBase]: 3792/5874 cut-off events. [2024-06-03 19:56:40,229 INFO L125 PetriNetUnfolderBase]: For 607344/607352 co-relation queries the response was YES. [2024-06-03 19:56:40,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45181 conditions, 5874 events. 3792/5874 cut-off events. For 607344/607352 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 33456 event pairs, 795 based on Foata normal form. 10/5881 useless extension candidates. Maximal degree in co-relation 45038. Up to 5806 conditions per place. [2024-06-03 19:56:40,305 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 382 selfloop transitions, 31 changer transitions 0/416 dead transitions. [2024-06-03 19:56:40,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 416 transitions, 5576 flow [2024-06-03 19:56:40,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:56:40,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:56:40,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-03 19:56:40,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-03 19:56:40,306 INFO L175 Difference]: Start difference. First operand has 314 places, 393 transitions, 4607 flow. Second operand 8 states and 121 transitions. [2024-06-03 19:56:40,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 416 transitions, 5576 flow [2024-06-03 19:56:41,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 416 transitions, 5442 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-06-03 19:56:41,852 INFO L231 Difference]: Finished difference. Result has 319 places, 397 transitions, 4626 flow [2024-06-03 19:56:41,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4503, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4626, PETRI_PLACES=319, PETRI_TRANSITIONS=397} [2024-06-03 19:56:41,852 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-03 19:56:41,852 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 397 transitions, 4626 flow [2024-06-03 19:56:41,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:41,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:41,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:41,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 19:56:41,853 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)] === [2024-06-03 19:56:41,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:41,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1517906283, now seen corresponding path program 3 times [2024-06-03 19:56:41,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:41,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833943763] [2024-06-03 19:56:41,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:41,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:41,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:42,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:42,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:42,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833943763] [2024-06-03 19:56:42,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833943763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:42,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:42,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:56:42,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591812016] [2024-06-03 19:56:42,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:42,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:56:42,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:42,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:56:42,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:56:42,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:56:42,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 397 transitions, 4626 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:42,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:42,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:56:42,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:43,775 INFO L124 PetriNetUnfolderBase]: 3802/5888 cut-off events. [2024-06-03 19:56:43,775 INFO L125 PetriNetUnfolderBase]: For 620703/620711 co-relation queries the response was YES. [2024-06-03 19:56:43,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45354 conditions, 5888 events. 3802/5888 cut-off events. For 620703/620711 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 33590 event pairs, 797 based on Foata normal form. 10/5895 useless extension candidates. Maximal degree in co-relation 45209. Up to 5811 conditions per place. [2024-06-03 19:56:43,851 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 381 selfloop transitions, 36 changer transitions 0/420 dead transitions. [2024-06-03 19:56:43,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 420 transitions, 5580 flow [2024-06-03 19:56:43,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:56:43,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:56:43,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-03 19:56:43,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-03 19:56:43,853 INFO L175 Difference]: Start difference. First operand has 319 places, 397 transitions, 4626 flow. Second operand 8 states and 124 transitions. [2024-06-03 19:56:43,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 420 transitions, 5580 flow [2024-06-03 19:56:45,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 420 transitions, 5491 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-03 19:56:45,672 INFO L231 Difference]: Finished difference. Result has 322 places, 400 transitions, 4671 flow [2024-06-03 19:56:45,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4537, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4671, PETRI_PLACES=322, PETRI_TRANSITIONS=400} [2024-06-03 19:56:45,673 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 280 predicate places. [2024-06-03 19:56:45,673 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 400 transitions, 4671 flow [2024-06-03 19:56:45,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:45,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:45,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:45,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 19:56:45,674 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)] === [2024-06-03 19:56:45,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:45,674 INFO L85 PathProgramCache]: Analyzing trace with hash -943446487, now seen corresponding path program 5 times [2024-06-03 19:56:45,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:45,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948196005] [2024-06-03 19:56:45,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:45,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:45,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:46,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:46,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:46,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948196005] [2024-06-03 19:56:46,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948196005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:46,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:46,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:56:46,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225534471] [2024-06-03 19:56:46,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:46,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:56:46,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:46,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:56:46,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:56:46,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:56:46,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 400 transitions, 4671 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:46,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:46,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:56:46,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:47,666 INFO L124 PetriNetUnfolderBase]: 3812/5904 cut-off events. [2024-06-03 19:56:47,667 INFO L125 PetriNetUnfolderBase]: For 634847/634851 co-relation queries the response was YES. [2024-06-03 19:56:47,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45583 conditions, 5904 events. 3812/5904 cut-off events. For 634847/634851 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 33669 event pairs, 804 based on Foata normal form. 6/5907 useless extension candidates. Maximal degree in co-relation 45437. Up to 5750 conditions per place. [2024-06-03 19:56:47,735 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 368 selfloop transitions, 50 changer transitions 0/421 dead transitions. [2024-06-03 19:56:47,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 421 transitions, 5601 flow [2024-06-03 19:56:47,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:56:47,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:56:47,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-03 19:56:47,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-03 19:56:47,736 INFO L175 Difference]: Start difference. First operand has 322 places, 400 transitions, 4671 flow. Second operand 8 states and 123 transitions. [2024-06-03 19:56:47,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 421 transitions, 5601 flow [2024-06-03 19:56:49,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 421 transitions, 5495 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-03 19:56:49,647 INFO L231 Difference]: Finished difference. Result has 325 places, 404 transitions, 4727 flow [2024-06-03 19:56:49,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4565, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4727, PETRI_PLACES=325, PETRI_TRANSITIONS=404} [2024-06-03 19:56:49,648 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-03 19:56:49,648 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 404 transitions, 4727 flow [2024-06-03 19:56:49,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:49,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:49,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:49,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 19:56:49,648 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)] === [2024-06-03 19:56:49,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:49,649 INFO L85 PathProgramCache]: Analyzing trace with hash -943326331, now seen corresponding path program 3 times [2024-06-03 19:56:49,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:49,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863975403] [2024-06-03 19:56:49,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:49,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:49,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:50,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:50,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:50,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863975403] [2024-06-03 19:56:50,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863975403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:50,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:50,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:56:50,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139776823] [2024-06-03 19:56:50,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:50,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:56:50,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:50,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:56:50,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:56:50,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:56:50,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 404 transitions, 4727 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:50,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:50,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:56:50,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:51,641 INFO L124 PetriNetUnfolderBase]: 3817/5909 cut-off events. [2024-06-03 19:56:51,642 INFO L125 PetriNetUnfolderBase]: For 645446/645454 co-relation queries the response was YES. [2024-06-03 19:56:51,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45831 conditions, 5909 events. 3817/5909 cut-off events. For 645446/645454 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 33674 event pairs, 796 based on Foata normal form. 9/5915 useless extension candidates. Maximal degree in co-relation 45683. Up to 5853 conditions per place. [2024-06-03 19:56:51,719 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 397 selfloop transitions, 25 changer transitions 0/425 dead transitions. [2024-06-03 19:56:51,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 425 transitions, 5691 flow [2024-06-03 19:56:51,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:56:51,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:56:51,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-03 19:56:51,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2024-06-03 19:56:51,721 INFO L175 Difference]: Start difference. First operand has 325 places, 404 transitions, 4727 flow. Second operand 8 states and 118 transitions. [2024-06-03 19:56:51,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 425 transitions, 5691 flow [2024-06-03 19:56:54,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 425 transitions, 5601 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-03 19:56:54,046 INFO L231 Difference]: Finished difference. Result has 329 places, 407 transitions, 4761 flow [2024-06-03 19:56:54,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4637, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4761, PETRI_PLACES=329, PETRI_TRANSITIONS=407} [2024-06-03 19:56:54,047 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-03 19:56:54,047 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 407 transitions, 4761 flow [2024-06-03 19:56:54,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:54,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:54,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:54,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 19:56:54,047 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)] === [2024-06-03 19:56:54,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:54,048 INFO L85 PathProgramCache]: Analyzing trace with hash -943326517, now seen corresponding path program 6 times [2024-06-03 19:56:54,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:54,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484188450] [2024-06-03 19:56:54,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:54,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:54,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:54,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:54,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484188450] [2024-06-03 19:56:54,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484188450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:54,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:54,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:56:54,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978422697] [2024-06-03 19:56:54,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:54,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:56:54,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:54,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:56:54,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:56:54,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:56:54,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 407 transitions, 4761 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:54,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:54,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:56:54,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:56,058 INFO L124 PetriNetUnfolderBase]: 3835/5936 cut-off events. [2024-06-03 19:56:56,059 INFO L125 PetriNetUnfolderBase]: For 664970/664974 co-relation queries the response was YES. [2024-06-03 19:56:56,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46137 conditions, 5936 events. 3835/5936 cut-off events. For 664970/664974 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 33801 event pairs, 804 based on Foata normal form. 6/5939 useless extension candidates. Maximal degree in co-relation 45988. Up to 5761 conditions per place. [2024-06-03 19:56:56,145 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 369 selfloop transitions, 60 changer transitions 0/432 dead transitions. [2024-06-03 19:56:56,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 432 transitions, 5907 flow [2024-06-03 19:56:56,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:56:56,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:56:56,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-03 19:56:56,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-03 19:56:56,147 INFO L175 Difference]: Start difference. First operand has 329 places, 407 transitions, 4761 flow. Second operand 8 states and 126 transitions. [2024-06-03 19:56:56,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 432 transitions, 5907 flow [2024-06-03 19:56:58,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 432 transitions, 5811 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-03 19:56:58,378 INFO L231 Difference]: Finished difference. Result has 332 places, 413 transitions, 4880 flow [2024-06-03 19:56:58,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4665, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4880, PETRI_PLACES=332, PETRI_TRANSITIONS=413} [2024-06-03 19:56:58,378 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-03 19:56:58,378 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 413 transitions, 4880 flow [2024-06-03 19:56:58,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:58,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:58,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:58,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 19:56:58,379 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)] === [2024-06-03 19:56:58,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:58,379 INFO L85 PathProgramCache]: Analyzing trace with hash -943449463, now seen corresponding path program 3 times [2024-06-03 19:56:58,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:58,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704398714] [2024-06-03 19:56:58,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:58,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:58,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:59,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:59,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:59,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704398714] [2024-06-03 19:56:59,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704398714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:59,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:59,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:56:59,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631506718] [2024-06-03 19:56:59,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:59,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:56:59,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:59,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:56:59,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:56:59,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:56:59,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 413 transitions, 4880 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:59,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:59,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:56:59,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:00,872 INFO L124 PetriNetUnfolderBase]: 3843/5948 cut-off events. [2024-06-03 19:57:00,872 INFO L125 PetriNetUnfolderBase]: For 680039/680043 co-relation queries the response was YES. [2024-06-03 19:57:00,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46499 conditions, 5948 events. 3843/5948 cut-off events. For 680039/680043 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 33861 event pairs, 804 based on Foata normal form. 6/5951 useless extension candidates. Maximal degree in co-relation 46348. Up to 5794 conditions per place. [2024-06-03 19:57:00,957 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 381 selfloop transitions, 48 changer transitions 0/432 dead transitions. [2024-06-03 19:57:00,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 432 transitions, 5810 flow [2024-06-03 19:57:00,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:57:00,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:57:00,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-03 19:57:00,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-03 19:57:00,959 INFO L175 Difference]: Start difference. First operand has 332 places, 413 transitions, 4880 flow. Second operand 8 states and 123 transitions. [2024-06-03 19:57:00,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 432 transitions, 5810 flow [2024-06-03 19:57:03,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 432 transitions, 5697 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-03 19:57:03,554 INFO L231 Difference]: Finished difference. Result has 335 places, 415 transitions, 4896 flow [2024-06-03 19:57:03,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4767, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4896, PETRI_PLACES=335, PETRI_TRANSITIONS=415} [2024-06-03 19:57:03,555 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 293 predicate places. [2024-06-03 19:57:03,555 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 415 transitions, 4896 flow [2024-06-03 19:57:03,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:03,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:03,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:03,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 19:57:03,555 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)] === [2024-06-03 19:57:03,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:03,556 INFO L85 PathProgramCache]: Analyzing trace with hash -943080067, now seen corresponding path program 1 times [2024-06-03 19:57:03,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:03,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992734356] [2024-06-03 19:57:03,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:03,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:03,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:04,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:04,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:04,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992734356] [2024-06-03 19:57:04,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992734356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:04,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:04,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:57:04,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581358129] [2024-06-03 19:57:04,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:04,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:57:04,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:04,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:57:04,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:57:04,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:57:04,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 415 transitions, 4896 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:04,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:04,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:57:04,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:06,088 INFO L124 PetriNetUnfolderBase]: 3851/5958 cut-off events. [2024-06-03 19:57:06,089 INFO L125 PetriNetUnfolderBase]: For 695062/695070 co-relation queries the response was YES. [2024-06-03 19:57:06,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46767 conditions, 5958 events. 3851/5958 cut-off events. For 695062/695070 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 33940 event pairs, 800 based on Foata normal form. 10/5965 useless extension candidates. Maximal degree in co-relation 46615. Up to 5876 conditions per place. [2024-06-03 19:57:06,172 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 394 selfloop transitions, 39 changer transitions 0/436 dead transitions. [2024-06-03 19:57:06,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 436 transitions, 5876 flow [2024-06-03 19:57:06,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:57:06,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:57:06,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-03 19:57:06,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-03 19:57:06,173 INFO L175 Difference]: Start difference. First operand has 335 places, 415 transitions, 4896 flow. Second operand 8 states and 123 transitions. [2024-06-03 19:57:06,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 436 transitions, 5876 flow [2024-06-03 19:57:09,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 436 transitions, 5767 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 19:57:09,073 INFO L231 Difference]: Finished difference. Result has 337 places, 417 transitions, 4928 flow [2024-06-03 19:57:09,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4787, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4928, PETRI_PLACES=337, PETRI_TRANSITIONS=417} [2024-06-03 19:57:09,074 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-03 19:57:09,074 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 417 transitions, 4928 flow [2024-06-03 19:57:09,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:09,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:09,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:09,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 19:57:09,075 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)] === [2024-06-03 19:57:09,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:09,075 INFO L85 PathProgramCache]: Analyzing trace with hash 141509785, now seen corresponding path program 4 times [2024-06-03 19:57:09,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:09,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259549787] [2024-06-03 19:57:09,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:09,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:09,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:09,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:09,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:09,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259549787] [2024-06-03 19:57:09,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259549787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:09,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:09,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:57:09,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115263203] [2024-06-03 19:57:09,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:09,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:57:09,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:09,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:57:09,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:57:09,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:57:09,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 417 transitions, 4928 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:09,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:09,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:57:09,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:11,155 INFO L124 PetriNetUnfolderBase]: 3856/5967 cut-off events. [2024-06-03 19:57:11,155 INFO L125 PetriNetUnfolderBase]: For 707753/707777 co-relation queries the response was YES. [2024-06-03 19:57:11,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47086 conditions, 5967 events. 3856/5967 cut-off events. For 707753/707777 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 34012 event pairs, 800 based on Foata normal form. 17/5977 useless extension candidates. Maximal degree in co-relation 46933. Up to 5855 conditions per place. [2024-06-03 19:57:11,236 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 407 selfloop transitions, 32 changer transitions 0/442 dead transitions. [2024-06-03 19:57:11,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 442 transitions, 5960 flow [2024-06-03 19:57:11,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:57:11,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:57:11,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-03 19:57:11,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-03 19:57:11,237 INFO L175 Difference]: Start difference. First operand has 337 places, 417 transitions, 4928 flow. Second operand 8 states and 123 transitions. [2024-06-03 19:57:11,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 442 transitions, 5960 flow [2024-06-03 19:57:13,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 442 transitions, 5835 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-03 19:57:13,494 INFO L231 Difference]: Finished difference. Result has 339 places, 420 transitions, 4961 flow [2024-06-03 19:57:13,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4803, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4961, PETRI_PLACES=339, PETRI_TRANSITIONS=420} [2024-06-03 19:57:13,495 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-03 19:57:13,495 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 420 transitions, 4961 flow [2024-06-03 19:57:13,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:13,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:13,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:13,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 19:57:13,496 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)] === [2024-06-03 19:57:13,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:13,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1598909609, now seen corresponding path program 7 times [2024-06-03 19:57:13,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:13,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606542673] [2024-06-03 19:57:13,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:13,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:13,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:14,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:14,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:14,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606542673] [2024-06-03 19:57:14,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606542673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:14,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:14,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:57:14,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440358631] [2024-06-03 19:57:14,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:14,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:57:14,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:14,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:57:14,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:57:14,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:57:14,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 420 transitions, 4961 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:14,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:14,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:57:14,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:15,458 INFO L124 PetriNetUnfolderBase]: 3866/5984 cut-off events. [2024-06-03 19:57:15,458 INFO L125 PetriNetUnfolderBase]: For 726552/726567 co-relation queries the response was YES. [2024-06-03 19:57:15,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47539 conditions, 5984 events. 3866/5984 cut-off events. For 726552/726567 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 34157 event pairs, 779 based on Foata normal form. 9/5979 useless extension candidates. Maximal degree in co-relation 47385. Up to 5601 conditions per place. [2024-06-03 19:57:15,537 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 339 selfloop transitions, 109 changer transitions 0/451 dead transitions. [2024-06-03 19:57:15,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 451 transitions, 6397 flow [2024-06-03 19:57:15,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:57:15,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:57:15,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 19:57:15,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-03 19:57:15,539 INFO L175 Difference]: Start difference. First operand has 339 places, 420 transitions, 4961 flow. Second operand 8 states and 133 transitions. [2024-06-03 19:57:15,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 451 transitions, 6397 flow [2024-06-03 19:57:17,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 451 transitions, 6243 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-03 19:57:17,884 INFO L231 Difference]: Finished difference. Result has 340 places, 426 transitions, 5141 flow [2024-06-03 19:57:17,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4807, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5141, PETRI_PLACES=340, PETRI_TRANSITIONS=426} [2024-06-03 19:57:17,885 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-03 19:57:17,885 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 426 transitions, 5141 flow [2024-06-03 19:57:17,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:17,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:17,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:17,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 19:57:17,886 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)] === [2024-06-03 19:57:17,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:17,886 INFO L85 PathProgramCache]: Analyzing trace with hash 141629941, now seen corresponding path program 4 times [2024-06-03 19:57:17,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:17,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018400372] [2024-06-03 19:57:17,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:17,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:18,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:18,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:18,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018400372] [2024-06-03 19:57:18,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018400372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:18,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:18,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:57:18,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633299458] [2024-06-03 19:57:18,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:18,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:57:18,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:18,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:57:18,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:57:18,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:57:18,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 426 transitions, 5141 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:18,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:18,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:57:18,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:19,951 INFO L124 PetriNetUnfolderBase]: 3884/6006 cut-off events. [2024-06-03 19:57:19,952 INFO L125 PetriNetUnfolderBase]: For 750129/750153 co-relation queries the response was YES. [2024-06-03 19:57:20,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48619 conditions, 6006 events. 3884/6006 cut-off events. For 750129/750153 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 34285 event pairs, 798 based on Foata normal form. 18/6017 useless extension candidates. Maximal degree in co-relation 48464. Up to 5808 conditions per place. [2024-06-03 19:57:20,034 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 380 selfloop transitions, 73 changer transitions 0/456 dead transitions. [2024-06-03 19:57:20,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 456 transitions, 6651 flow [2024-06-03 19:57:20,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:57:20,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:57:20,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-03 19:57:20,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-03 19:57:20,035 INFO L175 Difference]: Start difference. First operand has 340 places, 426 transitions, 5141 flow. Second operand 8 states and 129 transitions. [2024-06-03 19:57:20,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 456 transitions, 6651 flow [2024-06-03 19:57:22,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 456 transitions, 6451 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-03 19:57:22,702 INFO L231 Difference]: Finished difference. Result has 344 places, 432 transitions, 5255 flow [2024-06-03 19:57:22,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4941, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5255, PETRI_PLACES=344, PETRI_TRANSITIONS=432} [2024-06-03 19:57:22,703 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 302 predicate places. [2024-06-03 19:57:22,703 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 432 transitions, 5255 flow [2024-06-03 19:57:22,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:22,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:22,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:22,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 19:57:22,704 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)] === [2024-06-03 19:57:22,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:22,704 INFO L85 PathProgramCache]: Analyzing trace with hash 141629569, now seen corresponding path program 8 times [2024-06-03 19:57:22,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:22,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903718099] [2024-06-03 19:57:22,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:22,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:22,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:23,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:23,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:23,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903718099] [2024-06-03 19:57:23,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903718099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:23,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:23,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:57:23,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294535096] [2024-06-03 19:57:23,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:23,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:57:23,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:23,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:57:23,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:57:23,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:57:23,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 432 transitions, 5255 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:23,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:23,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:57:23,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:24,838 INFO L124 PetriNetUnfolderBase]: 3894/6023 cut-off events. [2024-06-03 19:57:24,838 INFO L125 PetriNetUnfolderBase]: For 767109/767124 co-relation queries the response was YES. [2024-06-03 19:57:24,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49087 conditions, 6023 events. 3894/6023 cut-off events. For 767109/767124 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 34370 event pairs, 765 based on Foata normal form. 9/6018 useless extension candidates. Maximal degree in co-relation 48930. Up to 5636 conditions per place. [2024-06-03 19:57:24,908 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 345 selfloop transitions, 110 changer transitions 0/458 dead transitions. [2024-06-03 19:57:24,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 458 transitions, 6629 flow [2024-06-03 19:57:24,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:57:24,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:57:24,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-03 19:57:24,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-03 19:57:24,909 INFO L175 Difference]: Start difference. First operand has 344 places, 432 transitions, 5255 flow. Second operand 8 states and 132 transitions. [2024-06-03 19:57:24,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 458 transitions, 6629 flow [2024-06-03 19:57:27,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 458 transitions, 6409 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-03 19:57:27,578 INFO L231 Difference]: Finished difference. Result has 347 places, 435 transitions, 5287 flow [2024-06-03 19:57:27,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5035, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5287, PETRI_PLACES=347, PETRI_TRANSITIONS=435} [2024-06-03 19:57:27,578 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-03 19:57:27,578 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 435 transitions, 5287 flow [2024-06-03 19:57:27,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:27,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:27,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:27,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 19:57:27,579 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)] === [2024-06-03 19:57:27,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:27,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1826989505, now seen corresponding path program 5 times [2024-06-03 19:57:27,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:27,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624026946] [2024-06-03 19:57:27,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:27,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:27,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:28,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:28,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624026946] [2024-06-03 19:57:28,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624026946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:28,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:28,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:57:28,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103903060] [2024-06-03 19:57:28,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:28,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:57:28,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:28,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:57:28,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:57:28,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:57:28,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 435 transitions, 5287 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:28,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:28,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:57:28,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:29,786 INFO L124 PetriNetUnfolderBase]: 3907/6038 cut-off events. [2024-06-03 19:57:29,786 INFO L125 PetriNetUnfolderBase]: For 780513/780537 co-relation queries the response was YES. [2024-06-03 19:57:29,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49397 conditions, 6038 events. 3907/6038 cut-off events. For 780513/780537 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 34471 event pairs, 799 based on Foata normal form. 17/6048 useless extension candidates. Maximal degree in co-relation 49239. Up to 5913 conditions per place. [2024-06-03 19:57:29,855 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 421 selfloop transitions, 45 changer transitions 0/469 dead transitions. [2024-06-03 19:57:29,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 469 transitions, 6698 flow [2024-06-03 19:57:29,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:57:29,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:57:29,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 146 transitions. [2024-06-03 19:57:29,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35609756097560974 [2024-06-03 19:57:29,856 INFO L175 Difference]: Start difference. First operand has 347 places, 435 transitions, 5287 flow. Second operand 10 states and 146 transitions. [2024-06-03 19:57:29,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 469 transitions, 6698 flow [2024-06-03 19:57:31,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 469 transitions, 6483 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-03 19:57:31,355 INFO L231 Difference]: Finished difference. Result has 353 places, 444 transitions, 5405 flow [2024-06-03 19:57:31,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5072, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5405, PETRI_PLACES=353, PETRI_TRANSITIONS=444} [2024-06-03 19:57:31,356 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 311 predicate places. [2024-06-03 19:57:31,356 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 444 transitions, 5405 flow [2024-06-03 19:57:31,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:31,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:31,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:31,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 19:57:31,356 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)] === [2024-06-03 19:57:31,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:31,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1599208325, now seen corresponding path program 6 times [2024-06-03 19:57:31,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:31,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381318772] [2024-06-03 19:57:31,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:31,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:32,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:32,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:32,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381318772] [2024-06-03 19:57:32,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381318772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:32,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:32,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:57:32,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584579881] [2024-06-03 19:57:32,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:32,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:57:32,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:32,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:57:32,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:57:32,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:57:32,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 444 transitions, 5405 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:32,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:32,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:57:32,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:33,435 INFO L124 PetriNetUnfolderBase]: 3912/6045 cut-off events. [2024-06-03 19:57:33,435 INFO L125 PetriNetUnfolderBase]: For 798489/798513 co-relation queries the response was YES. [2024-06-03 19:57:33,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49703 conditions, 6045 events. 3912/6045 cut-off events. For 798489/798513 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 34480 event pairs, 800 based on Foata normal form. 17/6055 useless extension candidates. Maximal degree in co-relation 49543. Up to 5856 conditions per place. [2024-06-03 19:57:33,520 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 392 selfloop transitions, 81 changer transitions 0/476 dead transitions. [2024-06-03 19:57:33,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 476 transitions, 7038 flow [2024-06-03 19:57:33,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:57:33,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:57:33,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-03 19:57:33,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-03 19:57:33,521 INFO L175 Difference]: Start difference. First operand has 353 places, 444 transitions, 5405 flow. Second operand 8 states and 126 transitions. [2024-06-03 19:57:33,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 476 transitions, 7038 flow [2024-06-03 19:57:35,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 476 transitions, 6868 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-03 19:57:35,524 INFO L231 Difference]: Finished difference. Result has 357 places, 455 transitions, 5704 flow [2024-06-03 19:57:35,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5235, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5704, PETRI_PLACES=357, PETRI_TRANSITIONS=455} [2024-06-03 19:57:35,524 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-03 19:57:35,524 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 455 transitions, 5704 flow [2024-06-03 19:57:35,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:35,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:35,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:35,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 19:57:35,525 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)] === [2024-06-03 19:57:35,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:35,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1522934425, now seen corresponding path program 7 times [2024-06-03 19:57:35,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:35,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163110505] [2024-06-03 19:57:35,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:35,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:36,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:36,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:36,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163110505] [2024-06-03 19:57:36,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163110505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:36,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:36,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:57:36,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610552137] [2024-06-03 19:57:36,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:36,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:57:36,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:36,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:57:36,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:57:36,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:57:36,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 455 transitions, 5704 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:36,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:36,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:57:36,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:37,738 INFO L124 PetriNetUnfolderBase]: 3909/6041 cut-off events. [2024-06-03 19:57:37,738 INFO L125 PetriNetUnfolderBase]: For 812130/812154 co-relation queries the response was YES. [2024-06-03 19:57:37,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50123 conditions, 6041 events. 3909/6041 cut-off events. For 812130/812154 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 34428 event pairs, 793 based on Foata normal form. 17/6051 useless extension candidates. Maximal degree in co-relation 49960. Up to 5917 conditions per place. [2024-06-03 19:57:37,823 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 427 selfloop transitions, 44 changer transitions 0/474 dead transitions. [2024-06-03 19:57:37,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 474 transitions, 6708 flow [2024-06-03 19:57:37,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:57:37,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:57:37,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-03 19:57:37,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-03 19:57:37,825 INFO L175 Difference]: Start difference. First operand has 357 places, 455 transitions, 5704 flow. Second operand 8 states and 120 transitions. [2024-06-03 19:57:37,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 474 transitions, 6708 flow [2024-06-03 19:57:40,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 474 transitions, 6506 flow, removed 87 selfloop flow, removed 3 redundant places. [2024-06-03 19:57:40,008 INFO L231 Difference]: Finished difference. Result has 362 places, 455 transitions, 5596 flow [2024-06-03 19:57:40,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5502, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5596, PETRI_PLACES=362, PETRI_TRANSITIONS=455} [2024-06-03 19:57:40,009 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-03 19:57:40,009 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 455 transitions, 5596 flow [2024-06-03 19:57:40,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:40,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:40,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:40,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 19:57:40,009 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)] === [2024-06-03 19:57:40,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:40,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1953708515, now seen corresponding path program 8 times [2024-06-03 19:57:40,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:40,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951847906] [2024-06-03 19:57:40,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:40,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:40,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:40,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:40,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:40,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951847906] [2024-06-03 19:57:40,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951847906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:40,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:40,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:57:40,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480804081] [2024-06-03 19:57:40,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:40,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:57:40,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:40,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:57:40,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:57:40,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:57:40,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 455 transitions, 5596 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:40,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:40,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:57:40,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:42,103 INFO L124 PetriNetUnfolderBase]: 3922/6059 cut-off events. [2024-06-03 19:57:42,103 INFO L125 PetriNetUnfolderBase]: For 829772/829796 co-relation queries the response was YES. [2024-06-03 19:57:42,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50332 conditions, 6059 events. 3922/6059 cut-off events. For 829772/829796 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34595 event pairs, 800 based on Foata normal form. 17/6069 useless extension candidates. Maximal degree in co-relation 50167. Up to 5868 conditions per place. [2024-06-03 19:57:42,191 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 388 selfloop transitions, 89 changer transitions 0/480 dead transitions. [2024-06-03 19:57:42,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 480 transitions, 7165 flow [2024-06-03 19:57:42,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:57:42,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:57:42,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-03 19:57:42,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-03 19:57:42,193 INFO L175 Difference]: Start difference. First operand has 362 places, 455 transitions, 5596 flow. Second operand 8 states and 123 transitions. [2024-06-03 19:57:42,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 480 transitions, 7165 flow [2024-06-03 19:57:45,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 480 transitions, 7077 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 19:57:45,174 INFO L231 Difference]: Finished difference. Result has 363 places, 462 transitions, 5867 flow [2024-06-03 19:57:45,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5508, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5867, PETRI_PLACES=363, PETRI_TRANSITIONS=462} [2024-06-03 19:57:45,175 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 321 predicate places. [2024-06-03 19:57:45,175 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 462 transitions, 5867 flow [2024-06-03 19:57:45,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:45,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:45,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:45,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 19:57:45,176 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)] === [2024-06-03 19:57:45,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:45,176 INFO L85 PathProgramCache]: Analyzing trace with hash 496308691, now seen corresponding path program 5 times [2024-06-03 19:57:45,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:45,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071651700] [2024-06-03 19:57:45,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:45,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:45,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:45,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:45,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:45,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071651700] [2024-06-03 19:57:45,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071651700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:45,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:45,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:57:45,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188924794] [2024-06-03 19:57:45,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:45,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:57:45,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:45,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:57:45,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:57:45,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:57:45,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 462 transitions, 5867 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:45,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:45,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:57:45,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:47,331 INFO L124 PetriNetUnfolderBase]: 3932/6075 cut-off events. [2024-06-03 19:57:47,331 INFO L125 PetriNetUnfolderBase]: For 851267/851267 co-relation queries the response was YES. [2024-06-03 19:57:47,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50709 conditions, 6075 events. 3932/6075 cut-off events. For 851267/851267 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 34711 event pairs, 814 based on Foata normal form. 2/6074 useless extension candidates. Maximal degree in co-relation 50543. Up to 6005 conditions per place. [2024-06-03 19:57:47,412 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 450 selfloop transitions, 29 changer transitions 0/482 dead transitions. [2024-06-03 19:57:47,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 482 transitions, 6931 flow [2024-06-03 19:57:47,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:57:47,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:57:47,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-03 19:57:47,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-03 19:57:47,413 INFO L175 Difference]: Start difference. First operand has 363 places, 462 transitions, 5867 flow. Second operand 8 states and 120 transitions. [2024-06-03 19:57:47,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 482 transitions, 6931 flow [2024-06-03 19:57:50,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 482 transitions, 6721 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-03 19:57:50,068 INFO L231 Difference]: Finished difference. Result has 367 places, 465 transitions, 5775 flow [2024-06-03 19:57:50,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5657, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5775, PETRI_PLACES=367, PETRI_TRANSITIONS=465} [2024-06-03 19:57:50,069 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-03 19:57:50,069 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 465 transitions, 5775 flow [2024-06-03 19:57:50,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:50,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:50,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:50,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 19:57:50,070 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)] === [2024-06-03 19:57:50,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:50,070 INFO L85 PathProgramCache]: Analyzing trace with hash 495892981, now seen corresponding path program 6 times [2024-06-03 19:57:50,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:50,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172736978] [2024-06-03 19:57:50,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:50,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:50,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:50,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:50,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:50,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172736978] [2024-06-03 19:57:50,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172736978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:50,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:50,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:57:50,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193693992] [2024-06-03 19:57:50,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:50,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:57:50,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:50,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:57:50,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:57:50,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:57:50,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 465 transitions, 5775 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:50,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:50,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:57:50,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:52,216 INFO L124 PetriNetUnfolderBase]: 3942/6087 cut-off events. [2024-06-03 19:57:52,217 INFO L125 PetriNetUnfolderBase]: For 867837/867861 co-relation queries the response was YES. [2024-06-03 19:57:52,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50807 conditions, 6087 events. 3942/6087 cut-off events. For 867837/867861 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 34775 event pairs, 800 based on Foata normal form. 18/6098 useless extension candidates. Maximal degree in co-relation 50640. Up to 5881 conditions per place. [2024-06-03 19:57:52,297 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 409 selfloop transitions, 77 changer transitions 0/489 dead transitions. [2024-06-03 19:57:52,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 489 transitions, 7075 flow [2024-06-03 19:57:52,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:57:52,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:57:52,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-03 19:57:52,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-03 19:57:52,298 INFO L175 Difference]: Start difference. First operand has 367 places, 465 transitions, 5775 flow. Second operand 8 states and 127 transitions. [2024-06-03 19:57:52,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 489 transitions, 7075 flow [2024-06-03 19:57:54,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 489 transitions, 6944 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-03 19:57:54,906 INFO L231 Difference]: Finished difference. Result has 368 places, 468 transitions, 5858 flow [2024-06-03 19:57:54,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5644, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5858, PETRI_PLACES=368, PETRI_TRANSITIONS=468} [2024-06-03 19:57:54,906 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-03 19:57:54,907 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 468 transitions, 5858 flow [2024-06-03 19:57:54,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:54,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:54,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:54,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 19:57:54,907 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)] === [2024-06-03 19:57:54,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:54,907 INFO L85 PathProgramCache]: Analyzing trace with hash 495892609, now seen corresponding path program 9 times [2024-06-03 19:57:54,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:54,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133062853] [2024-06-03 19:57:54,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:54,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:54,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:55,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:55,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:55,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133062853] [2024-06-03 19:57:55,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133062853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:55,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:55,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:57:55,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749902790] [2024-06-03 19:57:55,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:55,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:57:55,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:55,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:57:55,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:57:55,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:57:55,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 468 transitions, 5858 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:55,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:55,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:57:55,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:57,119 INFO L124 PetriNetUnfolderBase]: 3952/6104 cut-off events. [2024-06-03 19:57:57,120 INFO L125 PetriNetUnfolderBase]: For 884954/884969 co-relation queries the response was YES. [2024-06-03 19:57:57,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51107 conditions, 6104 events. 3952/6104 cut-off events. For 884954/884969 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 34898 event pairs, 778 based on Foata normal form. 9/6099 useless extension candidates. Maximal degree in co-relation 50939. Up to 5713 conditions per place. [2024-06-03 19:57:57,194 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 371 selfloop transitions, 116 changer transitions 0/490 dead transitions. [2024-06-03 19:57:57,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 490 transitions, 7313 flow [2024-06-03 19:57:57,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:57:57,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:57:57,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-03 19:57:57,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-03 19:57:57,196 INFO L175 Difference]: Start difference. First operand has 368 places, 468 transitions, 5858 flow. Second operand 8 states and 127 transitions. [2024-06-03 19:57:57,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 490 transitions, 7313 flow [2024-06-03 19:57:59,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 490 transitions, 7162 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-03 19:57:59,562 INFO L231 Difference]: Finished difference. Result has 371 places, 471 transitions, 5974 flow [2024-06-03 19:57:59,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5707, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5974, PETRI_PLACES=371, PETRI_TRANSITIONS=471} [2024-06-03 19:57:59,563 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-03 19:57:59,563 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 471 transitions, 5974 flow [2024-06-03 19:57:59,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:59,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:59,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:59,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 19:57:59,563 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)] === [2024-06-03 19:57:59,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:59,564 INFO L85 PathProgramCache]: Analyzing trace with hash 495892795, now seen corresponding path program 9 times [2024-06-03 19:57:59,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:59,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780434400] [2024-06-03 19:57:59,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:59,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:59,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:58:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:58:00,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:58:00,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780434400] [2024-06-03 19:58:00,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780434400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:58:00,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:58:00,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:58:00,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965932894] [2024-06-03 19:58:00,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:58:00,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:58:00,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:58:00,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:58:00,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:58:00,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:58:00,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 471 transitions, 5974 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:00,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:58:00,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:58:00,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:58:01,761 INFO L124 PetriNetUnfolderBase]: 3949/6097 cut-off events. [2024-06-03 19:58:01,762 INFO L125 PetriNetUnfolderBase]: For 892184/892208 co-relation queries the response was YES. [2024-06-03 19:58:01,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51264 conditions, 6097 events. 3949/6097 cut-off events. For 892184/892208 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 34824 event pairs, 802 based on Foata normal form. 17/6107 useless extension candidates. Maximal degree in co-relation 51095. Up to 5907 conditions per place. [2024-06-03 19:58:01,834 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 397 selfloop transitions, 88 changer transitions 0/488 dead transitions. [2024-06-03 19:58:01,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 488 transitions, 7198 flow [2024-06-03 19:58:01,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:58:01,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:58:01,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-03 19:58:01,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3719512195121951 [2024-06-03 19:58:01,835 INFO L175 Difference]: Start difference. First operand has 371 places, 471 transitions, 5974 flow. Second operand 8 states and 122 transitions. [2024-06-03 19:58:01,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 488 transitions, 7198 flow [2024-06-03 19:58:04,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 488 transitions, 6972 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-03 19:58:04,396 INFO L231 Difference]: Finished difference. Result has 374 places, 471 transitions, 5930 flow [2024-06-03 19:58:04,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5748, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5930, PETRI_PLACES=374, PETRI_TRANSITIONS=471} [2024-06-03 19:58:04,397 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-03 19:58:04,397 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 471 transitions, 5930 flow [2024-06-03 19:58:04,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:04,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:58:04,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:58:04,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 19:58:04,398 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)] === [2024-06-03 19:58:04,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:58:04,398 INFO L85 PathProgramCache]: Analyzing trace with hash -111872077, now seen corresponding path program 7 times [2024-06-03 19:58:04,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:58:04,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905536079] [2024-06-03 19:58:04,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:58:04,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:58:04,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:58:05,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:58:05,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:58:05,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905536079] [2024-06-03 19:58:05,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905536079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:58:05,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:58:05,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:58:05,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592271333] [2024-06-03 19:58:05,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:58:05,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:58:05,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:58:05,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:58:05,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:58:05,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:58:05,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 471 transitions, 5930 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:05,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:58:05,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:58:05,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:58:06,576 INFO L124 PetriNetUnfolderBase]: 3959/6113 cut-off events. [2024-06-03 19:58:06,576 INFO L125 PetriNetUnfolderBase]: For 914786/914786 co-relation queries the response was YES. [2024-06-03 19:58:06,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51382 conditions, 6113 events. 3959/6113 cut-off events. For 914786/914786 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 34921 event pairs, 820 based on Foata normal form. 2/6112 useless extension candidates. Maximal degree in co-relation 51212. Up to 6075 conditions per place. [2024-06-03 19:58:06,653 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 467 selfloop transitions, 17 changer transitions 0/487 dead transitions. [2024-06-03 19:58:06,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 487 transitions, 6998 flow [2024-06-03 19:58:06,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:58:06,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:58:06,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 111 transitions. [2024-06-03 19:58:06,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3384146341463415 [2024-06-03 19:58:06,655 INFO L175 Difference]: Start difference. First operand has 374 places, 471 transitions, 5930 flow. Second operand 8 states and 111 transitions. [2024-06-03 19:58:06,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 487 transitions, 6998 flow [2024-06-03 19:58:10,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 487 transitions, 6860 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-03 19:58:10,117 INFO L231 Difference]: Finished difference. Result has 378 places, 475 transitions, 5908 flow [2024-06-03 19:58:10,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5792, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5908, PETRI_PLACES=378, PETRI_TRANSITIONS=475} [2024-06-03 19:58:10,118 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-03 19:58:10,118 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 475 transitions, 5908 flow [2024-06-03 19:58:10,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:10,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:58:10,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:58:10,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 19:58:10,118 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)] === [2024-06-03 19:58:10,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:58:10,119 INFO L85 PathProgramCache]: Analyzing trace with hash 378407395, now seen corresponding path program 10 times [2024-06-03 19:58:10,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:58:10,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807170418] [2024-06-03 19:58:10,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:58:10,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:58:10,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:58:10,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:58:10,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:58:10,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807170418] [2024-06-03 19:58:10,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807170418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:58:10,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:58:10,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:58:10,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141492602] [2024-06-03 19:58:10,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:58:10,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:58:10,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:58:10,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:58:10,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:58:10,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:58:10,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 475 transitions, 5908 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:10,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:58:10,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:58:10,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:58:12,375 INFO L124 PetriNetUnfolderBase]: 3964/6118 cut-off events. [2024-06-03 19:58:12,375 INFO L125 PetriNetUnfolderBase]: For 926517/926541 co-relation queries the response was YES. [2024-06-03 19:58:12,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51505 conditions, 6118 events. 3964/6118 cut-off events. For 926517/926541 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 34985 event pairs, 801 based on Foata normal form. 17/6128 useless extension candidates. Maximal degree in co-relation 51333. Up to 6037 conditions per place. [2024-06-03 19:58:12,450 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 445 selfloop transitions, 44 changer transitions 0/492 dead transitions. [2024-06-03 19:58:12,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 492 transitions, 7215 flow [2024-06-03 19:58:12,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:58:12,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:58:12,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2024-06-03 19:58:12,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35060975609756095 [2024-06-03 19:58:12,452 INFO L175 Difference]: Start difference. First operand has 378 places, 475 transitions, 5908 flow. Second operand 8 states and 115 transitions. [2024-06-03 19:58:12,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 492 transitions, 7215 flow [2024-06-03 19:58:15,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 492 transitions, 7143 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-03 19:58:15,724 INFO L231 Difference]: Finished difference. Result has 381 places, 478 transitions, 6011 flow [2024-06-03 19:58:15,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5836, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6011, PETRI_PLACES=381, PETRI_TRANSITIONS=478} [2024-06-03 19:58:15,724 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 339 predicate places. [2024-06-03 19:58:15,724 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 478 transitions, 6011 flow [2024-06-03 19:58:15,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:15,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:58:15,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:58:15,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 19:58:15,725 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)] === [2024-06-03 19:58:15,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:58:15,725 INFO L85 PathProgramCache]: Analyzing trace with hash 201276061, now seen corresponding path program 8 times [2024-06-03 19:58:15,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:58:15,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959392599] [2024-06-03 19:58:15,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:58:15,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:58:15,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:58:16,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:58:16,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:58:16,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959392599] [2024-06-03 19:58:16,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959392599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:58:16,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:58:16,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:58:16,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211387840] [2024-06-03 19:58:16,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:58:16,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:58:16,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:58:16,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:58:16,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:58:16,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:58:16,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 478 transitions, 6011 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:16,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:58:16,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:58:16,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:58:17,827 INFO L124 PetriNetUnfolderBase]: 3974/6132 cut-off events. [2024-06-03 19:58:17,827 INFO L125 PetriNetUnfolderBase]: For 949509/949533 co-relation queries the response was YES. [2024-06-03 19:58:18,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51803 conditions, 6132 events. 3974/6132 cut-off events. For 949509/949533 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 35055 event pairs, 801 based on Foata normal form. 18/6143 useless extension candidates. Maximal degree in co-relation 51630. Up to 6062 conditions per place. [2024-06-03 19:58:18,065 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 460 selfloop transitions, 32 changer transitions 0/495 dead transitions. [2024-06-03 19:58:18,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 495 transitions, 7108 flow [2024-06-03 19:58:18,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:58:18,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:58:18,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2024-06-03 19:58:18,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35060975609756095 [2024-06-03 19:58:18,066 INFO L175 Difference]: Start difference. First operand has 381 places, 478 transitions, 6011 flow. Second operand 8 states and 115 transitions. [2024-06-03 19:58:18,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 495 transitions, 7108 flow [2024-06-03 19:58:21,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 495 transitions, 6863 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-03 19:58:21,051 INFO L231 Difference]: Finished difference. Result has 382 places, 481 transitions, 5907 flow [2024-06-03 19:58:21,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5766, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5907, PETRI_PLACES=382, PETRI_TRANSITIONS=481} [2024-06-03 19:58:21,052 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 340 predicate places. [2024-06-03 19:58:21,052 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 481 transitions, 5907 flow [2024-06-03 19:58:21,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:21,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:58:21,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:58:21,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 19:58:21,053 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)] === [2024-06-03 19:58:21,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:58:21,053 INFO L85 PathProgramCache]: Analyzing trace with hash 201038911, now seen corresponding path program 9 times [2024-06-03 19:58:21,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:58:21,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261750650] [2024-06-03 19:58:21,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:58:21,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:58:21,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:58:21,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:58:21,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:58:21,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261750650] [2024-06-03 19:58:21,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261750650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:58:21,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:58:21,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:58:21,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617368335] [2024-06-03 19:58:21,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:58:21,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:58:21,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:58:21,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:58:21,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:58:21,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:58:21,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 481 transitions, 5907 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:21,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:58:21,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:58:21,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:58:23,305 INFO L124 PetriNetUnfolderBase]: 3968/6124 cut-off events. [2024-06-03 19:58:23,306 INFO L125 PetriNetUnfolderBase]: For 955679/955703 co-relation queries the response was YES. [2024-06-03 19:58:23,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51465 conditions, 6124 events. 3968/6124 cut-off events. For 955679/955703 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 34996 event pairs, 796 based on Foata normal form. 18/6135 useless extension candidates. Maximal degree in co-relation 51292. Up to 6039 conditions per place. [2024-06-03 19:58:23,536 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 453 selfloop transitions, 40 changer transitions 0/496 dead transitions. [2024-06-03 19:58:23,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 496 transitions, 6947 flow [2024-06-03 19:58:23,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:58:23,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:58:23,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-03 19:58:23,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3567073170731707 [2024-06-03 19:58:23,537 INFO L175 Difference]: Start difference. First operand has 382 places, 481 transitions, 5907 flow. Second operand 8 states and 117 transitions. [2024-06-03 19:58:23,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 496 transitions, 6947 flow [2024-06-03 19:58:26,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 496 transitions, 6800 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-03 19:58:26,402 INFO L231 Difference]: Finished difference. Result has 383 places, 481 transitions, 5846 flow [2024-06-03 19:58:26,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5760, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5846, PETRI_PLACES=383, PETRI_TRANSITIONS=481} [2024-06-03 19:58:26,402 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 341 predicate places. [2024-06-03 19:58:26,402 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 481 transitions, 5846 flow [2024-06-03 19:58:26,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:26,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:58:26,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:58:26,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 19:58:26,403 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)] === [2024-06-03 19:58:26,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:58:26,403 INFO L85 PathProgramCache]: Analyzing trace with hash 201038725, now seen corresponding path program 11 times [2024-06-03 19:58:26,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:58:26,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418913432] [2024-06-03 19:58:26,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:58:26,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:58:26,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:58:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:58:27,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:58:27,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418913432] [2024-06-03 19:58:27,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418913432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:58:27,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:58:27,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:58:27,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715316885] [2024-06-03 19:58:27,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:58:27,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:58:27,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:58:27,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:58:27,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:58:27,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:58:27,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 481 transitions, 5846 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:27,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:58:27,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:58:27,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:58:28,623 INFO L124 PetriNetUnfolderBase]: 3965/6120 cut-off events. [2024-06-03 19:58:28,623 INFO L125 PetriNetUnfolderBase]: For 960629/960653 co-relation queries the response was YES. [2024-06-03 19:58:28,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51387 conditions, 6120 events. 3965/6120 cut-off events. For 960629/960653 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 34955 event pairs, 804 based on Foata normal form. 17/6130 useless extension candidates. Maximal degree in co-relation 51214. Up to 6062 conditions per place. [2024-06-03 19:58:28,711 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 466 selfloop transitions, 25 changer transitions 0/494 dead transitions. [2024-06-03 19:58:28,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 494 transitions, 6870 flow [2024-06-03 19:58:28,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:58:28,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:58:28,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-06-03 19:58:28,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34146341463414637 [2024-06-03 19:58:28,713 INFO L175 Difference]: Start difference. First operand has 383 places, 481 transitions, 5846 flow. Second operand 8 states and 112 transitions. [2024-06-03 19:58:28,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 494 transitions, 6870 flow [2024-06-03 19:58:33,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 494 transitions, 6687 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-03 19:58:33,412 INFO L231 Difference]: Finished difference. Result has 384 places, 481 transitions, 5719 flow [2024-06-03 19:58:33,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5663, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5719, PETRI_PLACES=384, PETRI_TRANSITIONS=481} [2024-06-03 19:58:33,412 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 342 predicate places. [2024-06-03 19:58:33,412 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 481 transitions, 5719 flow [2024-06-03 19:58:33,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:33,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:58:33,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:58:33,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 19:58:33,413 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)] === [2024-06-03 19:58:33,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:58:33,413 INFO L85 PathProgramCache]: Analyzing trace with hash 606487291, now seen corresponding path program 10 times [2024-06-03 19:58:33,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:58:33,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319832444] [2024-06-03 19:58:33,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:58:33,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:58:33,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:58:34,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:58:34,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:58:34,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319832444] [2024-06-03 19:58:34,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319832444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:58:34,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:58:34,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:58:34,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076658165] [2024-06-03 19:58:34,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:58:34,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:58:34,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:58:34,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:58:34,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:58:34,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:58:34,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 481 transitions, 5719 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:34,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:58:34,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:58:34,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:58:35,541 INFO L124 PetriNetUnfolderBase]: 3975/6136 cut-off events. [2024-06-03 19:58:35,541 INFO L125 PetriNetUnfolderBase]: For 983279/983279 co-relation queries the response was YES. [2024-06-03 19:58:35,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51512 conditions, 6136 events. 3975/6136 cut-off events. For 983279/983279 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 35077 event pairs, 821 based on Foata normal form. 2/6135 useless extension candidates. Maximal degree in co-relation 51338. Up to 6084 conditions per place. [2024-06-03 19:58:35,635 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 472 selfloop transitions, 23 changer transitions 0/498 dead transitions. [2024-06-03 19:58:35,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 498 transitions, 6810 flow [2024-06-03 19:58:35,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:58:35,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:58:35,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 124 transitions. [2024-06-03 19:58:35,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33604336043360433 [2024-06-03 19:58:35,637 INFO L175 Difference]: Start difference. First operand has 384 places, 481 transitions, 5719 flow. Second operand 9 states and 124 transitions. [2024-06-03 19:58:35,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 498 transitions, 6810 flow [2024-06-03 19:58:39,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 498 transitions, 6659 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-03 19:58:39,882 INFO L231 Difference]: Finished difference. Result has 385 places, 484 transitions, 5683 flow [2024-06-03 19:58:39,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5568, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5683, PETRI_PLACES=385, PETRI_TRANSITIONS=484} [2024-06-03 19:58:39,883 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 343 predicate places. [2024-06-03 19:58:39,883 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 484 transitions, 5683 flow [2024-06-03 19:58:39,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:39,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:58:39,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:58:39,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 19:58:39,883 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)] === [2024-06-03 19:58:39,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:58:39,884 INFO L85 PathProgramCache]: Analyzing trace with hash -327753857, now seen corresponding path program 10 times [2024-06-03 19:58:39,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:58:39,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978034482] [2024-06-03 19:58:39,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:58:39,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:58:39,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:58:40,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:58:40,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:58:40,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978034482] [2024-06-03 19:58:40,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978034482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:58:40,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:58:40,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:58:40,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502849308] [2024-06-03 19:58:40,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:58:40,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:58:40,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:58:40,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:58:40,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:58:40,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:58:40,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 484 transitions, 5683 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:40,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:58:40,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:58:40,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:58:42,086 INFO L124 PetriNetUnfolderBase]: 3969/6129 cut-off events. [2024-06-03 19:58:42,086 INFO L125 PetriNetUnfolderBase]: For 985358/985373 co-relation queries the response was YES. [2024-06-03 19:58:42,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50626 conditions, 6129 events. 3969/6129 cut-off events. For 985358/985373 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 35056 event pairs, 819 based on Foata normal form. 9/6124 useless extension candidates. Maximal degree in co-relation 50452. Up to 5956 conditions per place. [2024-06-03 19:58:42,169 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 438 selfloop transitions, 57 changer transitions 0/498 dead transitions. [2024-06-03 19:58:42,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 498 transitions, 6927 flow [2024-06-03 19:58:42,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:58:42,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:58:42,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-03 19:58:42,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3719512195121951 [2024-06-03 19:58:42,171 INFO L175 Difference]: Start difference. First operand has 385 places, 484 transitions, 5683 flow. Second operand 8 states and 122 transitions. [2024-06-03 19:58:42,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 498 transitions, 6927 flow [2024-06-03 19:58:45,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 498 transitions, 6845 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-03 19:58:45,285 INFO L231 Difference]: Finished difference. Result has 387 places, 484 transitions, 5721 flow [2024-06-03 19:58:45,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5601, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5721, PETRI_PLACES=387, PETRI_TRANSITIONS=484} [2024-06-03 19:58:45,286 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 345 predicate places. [2024-06-03 19:58:45,286 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 484 transitions, 5721 flow [2024-06-03 19:58:45,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:45,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:58:45,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:58:45,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 19:58:45,287 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)] === [2024-06-03 19:58:45,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:58:45,287 INFO L85 PathProgramCache]: Analyzing trace with hash 200918569, now seen corresponding path program 11 times [2024-06-03 19:58:45,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:58:45,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622099209] [2024-06-03 19:58:45,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:58:45,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:58:45,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:58:45,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:58:45,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:58:45,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622099209] [2024-06-03 19:58:45,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622099209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:58:45,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:58:45,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:58:45,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471705519] [2024-06-03 19:58:45,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:58:45,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:58:45,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:58:45,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:58:45,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:58:46,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:58:46,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 484 transitions, 5721 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:46,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:58:46,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:58:46,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:58:47,525 INFO L124 PetriNetUnfolderBase]: 3963/6121 cut-off events. [2024-06-03 19:58:47,525 INFO L125 PetriNetUnfolderBase]: For 991420/991435 co-relation queries the response was YES. [2024-06-03 19:58:47,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50564 conditions, 6121 events. 3963/6121 cut-off events. For 991420/991435 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 34957 event pairs, 820 based on Foata normal form. 9/6116 useless extension candidates. Maximal degree in co-relation 50389. Up to 5964 conditions per place. [2024-06-03 19:58:47,599 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 443 selfloop transitions, 50 changer transitions 0/496 dead transitions. [2024-06-03 19:58:47,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 496 transitions, 6741 flow [2024-06-03 19:58:47,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:58:47,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:58:47,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-03 19:58:47,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2024-06-03 19:58:47,601 INFO L175 Difference]: Start difference. First operand has 387 places, 484 transitions, 5721 flow. Second operand 8 states and 118 transitions. [2024-06-03 19:58:47,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 496 transitions, 6741 flow [2024-06-03 19:58:51,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 496 transitions, 6527 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-03 19:58:51,751 INFO L231 Difference]: Finished difference. Result has 387 places, 484 transitions, 5613 flow [2024-06-03 19:58:51,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5507, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5613, PETRI_PLACES=387, PETRI_TRANSITIONS=484} [2024-06-03 19:58:51,751 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 345 predicate places. [2024-06-03 19:58:51,752 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 484 transitions, 5613 flow [2024-06-03 19:58:51,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:51,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:58:51,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:58:51,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 19:58:51,752 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)] === [2024-06-03 19:58:51,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:58:51,752 INFO L85 PathProgramCache]: Analyzing trace with hash 378170059, now seen corresponding path program 12 times [2024-06-03 19:58:51,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:58:51,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598691483] [2024-06-03 19:58:51,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:58:51,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:58:51,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:58:52,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:58:52,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:58:52,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598691483] [2024-06-03 19:58:52,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598691483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:58:52,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:58:52,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:58:52,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192225263] [2024-06-03 19:58:52,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:58:52,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:58:52,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:58:52,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:58:52,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:58:52,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:58:52,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 484 transitions, 5613 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:52,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:58:52,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:58:52,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:58:53,877 INFO L124 PetriNetUnfolderBase]: 3957/6113 cut-off events. [2024-06-03 19:58:53,878 INFO L125 PetriNetUnfolderBase]: For 996308/996323 co-relation queries the response was YES. [2024-06-03 19:58:53,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50280 conditions, 6113 events. 3957/6113 cut-off events. For 996308/996323 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 34933 event pairs, 813 based on Foata normal form. 9/6108 useless extension candidates. Maximal degree in co-relation 50106. Up to 5904 conditions per place. [2024-06-03 19:58:53,970 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 417 selfloop transitions, 78 changer transitions 0/498 dead transitions. [2024-06-03 19:58:53,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 498 transitions, 6861 flow [2024-06-03 19:58:53,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:58:53,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:58:53,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-03 19:58:53,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-03 19:58:53,972 INFO L175 Difference]: Start difference. First operand has 387 places, 484 transitions, 5613 flow. Second operand 8 states and 121 transitions. [2024-06-03 19:58:53,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 498 transitions, 6861 flow [2024-06-03 19:58:58,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 498 transitions, 6701 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-03 19:58:58,267 INFO L231 Difference]: Finished difference. Result has 387 places, 484 transitions, 5615 flow [2024-06-03 19:58:58,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5453, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5615, PETRI_PLACES=387, PETRI_TRANSITIONS=484} [2024-06-03 19:58:58,268 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 345 predicate places. [2024-06-03 19:58:58,268 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 484 transitions, 5615 flow [2024-06-03 19:58:58,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:58,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:58:58,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:58:58,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 19:58:58,268 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)] === [2024-06-03 19:58:58,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:58:58,269 INFO L85 PathProgramCache]: Analyzing trace with hash 205680541, now seen corresponding path program 11 times [2024-06-03 19:58:58,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:58:58,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174976591] [2024-06-03 19:58:58,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:58:58,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:58:58,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:58:59,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:58:59,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:58:59,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174976591] [2024-06-03 19:58:59,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174976591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:58:59,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:58:59,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:58:59,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941350586] [2024-06-03 19:58:59,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:58:59,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:58:59,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:58:59,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:58:59,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:58:59,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:58:59,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 484 transitions, 5615 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:59,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:58:59,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:58:59,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:59:00,363 INFO L124 PetriNetUnfolderBase]: 3967/6124 cut-off events. [2024-06-03 19:59:00,363 INFO L125 PetriNetUnfolderBase]: For 1013574/1013598 co-relation queries the response was YES. [2024-06-03 19:59:00,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50536 conditions, 6124 events. 3967/6124 cut-off events. For 1013574/1013598 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 34991 event pairs, 794 based on Foata normal form. 18/6135 useless extension candidates. Maximal degree in co-relation 50363. Up to 5981 conditions per place. [2024-06-03 19:59:00,452 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 436 selfloop transitions, 65 changer transitions 0/504 dead transitions. [2024-06-03 19:59:00,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 504 transitions, 6962 flow [2024-06-03 19:59:00,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:59:00,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:59:00,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-03 19:59:00,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-03 19:59:00,454 INFO L175 Difference]: Start difference. First operand has 387 places, 484 transitions, 5615 flow. Second operand 8 states and 120 transitions. [2024-06-03 19:59:00,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 504 transitions, 6962 flow [2024-06-03 19:59:05,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 504 transitions, 6738 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 19:59:05,181 INFO L231 Difference]: Finished difference. Result has 388 places, 487 transitions, 5590 flow [2024-06-03 19:59:05,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5391, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5590, PETRI_PLACES=388, PETRI_TRANSITIONS=487} [2024-06-03 19:59:05,181 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 346 predicate places. [2024-06-03 19:59:05,181 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 487 transitions, 5590 flow [2024-06-03 19:59:05,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:05,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:59:05,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:59:05,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 19:59:05,182 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)] === [2024-06-03 19:59:05,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:59:05,182 INFO L85 PathProgramCache]: Analyzing trace with hash 378170245, now seen corresponding path program 12 times [2024-06-03 19:59:05,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:59:05,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740393207] [2024-06-03 19:59:05,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:59:05,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:59:05,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:59:05,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:59:05,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:59:05,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740393207] [2024-06-03 19:59:05,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740393207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:59:05,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:59:05,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:59:05,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850827749] [2024-06-03 19:59:05,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:59:05,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:59:05,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:59:05,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:59:05,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:59:05,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:59:06,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 487 transitions, 5590 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:06,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:59:06,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:59:06,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:59:07,329 INFO L124 PetriNetUnfolderBase]: 3964/6120 cut-off events. [2024-06-03 19:59:07,330 INFO L125 PetriNetUnfolderBase]: For 1018295/1018319 co-relation queries the response was YES. [2024-06-03 19:59:07,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50461 conditions, 6120 events. 3964/6120 cut-off events. For 1018295/1018319 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 34946 event pairs, 805 based on Foata normal form. 17/6130 useless extension candidates. Maximal degree in co-relation 50287. Up to 6041 conditions per place. [2024-06-03 19:59:07,421 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 455 selfloop transitions, 42 changer transitions 0/500 dead transitions. [2024-06-03 19:59:07,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 500 transitions, 6626 flow [2024-06-03 19:59:07,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:59:07,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:59:07,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2024-06-03 19:59:07,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35060975609756095 [2024-06-03 19:59:07,422 INFO L175 Difference]: Start difference. First operand has 388 places, 487 transitions, 5590 flow. Second operand 8 states and 115 transitions. [2024-06-03 19:59:07,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 500 transitions, 6626 flow [2024-06-03 19:59:12,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 500 transitions, 6327 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-03 19:59:12,495 INFO L231 Difference]: Finished difference. Result has 389 places, 487 transitions, 5381 flow [2024-06-03 19:59:12,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5291, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5381, PETRI_PLACES=389, PETRI_TRANSITIONS=487} [2024-06-03 19:59:12,496 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-03 19:59:12,496 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 487 transitions, 5381 flow [2024-06-03 19:59:12,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:12,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:59:12,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:59:12,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 19:59:12,497 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)] === [2024-06-03 19:59:12,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:59:12,497 INFO L85 PathProgramCache]: Analyzing trace with hash 240230263, now seen corresponding path program 12 times [2024-06-03 19:59:12,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:59:12,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294111643] [2024-06-03 19:59:12,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:59:12,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:59:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:59:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:59:13,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:59:13,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294111643] [2024-06-03 19:59:13,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294111643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:59:13,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:59:13,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:59:13,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842407412] [2024-06-03 19:59:13,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:59:13,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:59:13,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:59:13,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:59:13,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:59:13,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:59:13,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 487 transitions, 5381 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:13,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:59:13,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:59:13,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:59:14,676 INFO L124 PetriNetUnfolderBase]: 3958/6114 cut-off events. [2024-06-03 19:59:14,677 INFO L125 PetriNetUnfolderBase]: For 1028046/1028046 co-relation queries the response was YES. [2024-06-03 19:59:14,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50062 conditions, 6114 events. 3958/6114 cut-off events. For 1028046/1028046 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 35001 event pairs, 817 based on Foata normal form. 2/6113 useless extension candidates. Maximal degree in co-relation 49887. Up to 6062 conditions per place. [2024-06-03 19:59:14,768 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 476 selfloop transitions, 22 changer transitions 0/501 dead transitions. [2024-06-03 19:59:14,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 501 transitions, 6425 flow [2024-06-03 19:59:14,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:59:14,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:59:14,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2024-06-03 19:59:14,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35060975609756095 [2024-06-03 19:59:14,769 INFO L175 Difference]: Start difference. First operand has 389 places, 487 transitions, 5381 flow. Second operand 8 states and 115 transitions. [2024-06-03 19:59:14,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 501 transitions, 6425 flow [2024-06-03 19:59:19,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 501 transitions, 6299 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-03 19:59:19,559 INFO L231 Difference]: Finished difference. Result has 391 places, 487 transitions, 5305 flow [2024-06-03 19:59:19,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5255, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5305, PETRI_PLACES=391, PETRI_TRANSITIONS=487} [2024-06-03 19:59:19,560 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 349 predicate places. [2024-06-03 19:59:19,560 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 487 transitions, 5305 flow [2024-06-03 19:59:19,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:19,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:59:19,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:59:19,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 19:59:19,560 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)] === [2024-06-03 19:59:19,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:59:19,561 INFO L85 PathProgramCache]: Analyzing trace with hash 615067099, now seen corresponding path program 2 times [2024-06-03 19:59:19,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:59:19,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977087863] [2024-06-03 19:59:19,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:59:19,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:59:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:59:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:59:20,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:59:20,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977087863] [2024-06-03 19:59:20,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977087863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:59:20,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:59:20,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:59:20,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013080801] [2024-06-03 19:59:20,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:59:20,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:59:20,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:59:20,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:59:20,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:59:20,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:59:20,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 487 transitions, 5305 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:20,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:59:20,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:59:20,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:59:22,351 INFO L124 PetriNetUnfolderBase]: 3979/6145 cut-off events. [2024-06-03 19:59:22,351 INFO L125 PetriNetUnfolderBase]: For 1060168/1060168 co-relation queries the response was YES. [2024-06-03 19:59:22,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50696 conditions, 6145 events. 3979/6145 cut-off events. For 1060168/1060168 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 35180 event pairs, 824 based on Foata normal form. 2/6144 useless extension candidates. Maximal degree in co-relation 50520. Up to 6082 conditions per place. [2024-06-03 19:59:22,444 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 479 selfloop transitions, 24 changer transitions 0/506 dead transitions. [2024-06-03 19:59:22,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 506 transitions, 6695 flow [2024-06-03 19:59:22,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:59:22,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:59:22,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2024-06-03 19:59:22,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33875338753387535 [2024-06-03 19:59:22,445 INFO L175 Difference]: Start difference. First operand has 391 places, 487 transitions, 5305 flow. Second operand 9 states and 125 transitions. [2024-06-03 19:59:22,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 506 transitions, 6695 flow [2024-06-03 19:59:27,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 506 transitions, 6575 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-03 19:59:27,034 INFO L231 Difference]: Finished difference. Result has 392 places, 491 transitions, 5362 flow [2024-06-03 19:59:27,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5185, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5362, PETRI_PLACES=392, PETRI_TRANSITIONS=491} [2024-06-03 19:59:27,035 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 350 predicate places. [2024-06-03 19:59:27,035 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 491 transitions, 5362 flow [2024-06-03 19:59:27,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:27,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:59:27,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:59:27,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 19:59:27,036 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)] === [2024-06-03 19:59:27,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:59:27,037 INFO L85 PathProgramCache]: Analyzing trace with hash -315485297, now seen corresponding path program 3 times [2024-06-03 19:59:27,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:59:27,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398511634] [2024-06-03 19:59:27,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:59:27,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:59:27,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:59:28,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:59:28,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:59:28,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398511634] [2024-06-03 19:59:28,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398511634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:59:28,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:59:28,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:59:28,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305943274] [2024-06-03 19:59:28,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:59:28,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:59:28,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:59:28,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:59:28,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:59:28,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:59:28,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 491 transitions, 5362 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:28,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:59:28,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:59:28,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:59:29,661 INFO L124 PetriNetUnfolderBase]: 3974/6138 cut-off events. [2024-06-03 19:59:29,662 INFO L125 PetriNetUnfolderBase]: For 1066620/1066620 co-relation queries the response was YES. [2024-06-03 19:59:29,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50527 conditions, 6138 events. 3974/6138 cut-off events. For 1066620/1066620 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 35103 event pairs, 825 based on Foata normal form. 2/6137 useless extension candidates. Maximal degree in co-relation 50352. Up to 6092 conditions per place. [2024-06-03 19:59:29,743 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 480 selfloop transitions, 20 changer transitions 0/503 dead transitions. [2024-06-03 19:59:29,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 503 transitions, 6394 flow [2024-06-03 19:59:29,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:59:29,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:59:29,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-06-03 19:59:29,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34146341463414637 [2024-06-03 19:59:29,745 INFO L175 Difference]: Start difference. First operand has 392 places, 491 transitions, 5362 flow. Second operand 8 states and 112 transitions. [2024-06-03 19:59:29,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 503 transitions, 6394 flow [2024-06-03 19:59:33,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 503 transitions, 6261 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-03 19:59:33,391 INFO L231 Difference]: Finished difference. Result has 395 places, 491 transitions, 5274 flow [2024-06-03 19:59:33,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5229, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5274, PETRI_PLACES=395, PETRI_TRANSITIONS=491} [2024-06-03 19:59:33,392 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-03 19:59:33,392 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 491 transitions, 5274 flow [2024-06-03 19:59:33,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:33,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:59:33,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:59:33,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 19:59:33,392 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)] === [2024-06-03 19:59:33,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:59:33,393 INFO L85 PathProgramCache]: Analyzing trace with hash 247072731, now seen corresponding path program 4 times [2024-06-03 19:59:33,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:59:33,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282440243] [2024-06-03 19:59:33,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:59:33,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:59:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:59:34,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:59:34,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:59:34,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282440243] [2024-06-03 19:59:34,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282440243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:59:34,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:59:34,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:59:34,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568335717] [2024-06-03 19:59:34,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:59:34,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:59:34,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:59:34,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:59:34,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:59:34,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:59:34,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 491 transitions, 5274 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 19:59:34,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:59:34,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:59:34,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:59:36,171 INFO L124 PetriNetUnfolderBase]: 3969/6128 cut-off events. [2024-06-03 19:59:36,171 INFO L125 PetriNetUnfolderBase]: For 1069683/1069701 co-relation queries the response was YES. [2024-06-03 19:59:36,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50208 conditions, 6128 events. 3969/6128 cut-off events. For 1069683/1069701 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 35001 event pairs, 801 based on Foata normal form. 14/6136 useless extension candidates. Maximal degree in co-relation 50031. Up to 6045 conditions per place. [2024-06-03 19:59:36,254 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 464 selfloop transitions, 42 changer transitions 0/509 dead transitions. [2024-06-03 19:59:36,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 509 transitions, 6434 flow [2024-06-03 19:59:36,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:59:36,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:59:36,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 126 transitions. [2024-06-03 19:59:36,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34146341463414637 [2024-06-03 19:59:36,256 INFO L175 Difference]: Start difference. First operand has 395 places, 491 transitions, 5274 flow. Second operand 9 states and 126 transitions. [2024-06-03 19:59:36,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 509 transitions, 6434 flow [2024-06-03 19:59:39,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 509 transitions, 6387 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-03 19:59:39,482 INFO L231 Difference]: Finished difference. Result has 398 places, 496 transitions, 5425 flow [2024-06-03 19:59:39,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5229, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5425, PETRI_PLACES=398, PETRI_TRANSITIONS=496} [2024-06-03 19:59:39,482 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 356 predicate places. [2024-06-03 19:59:39,482 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 496 transitions, 5425 flow [2024-06-03 19:59:39,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 19:59:39,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:59:39,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:59:39,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 19:59:39,483 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)] === [2024-06-03 19:59:39,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:59:39,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1911655939, now seen corresponding path program 4 times [2024-06-03 19:59:39,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:59:39,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773252636] [2024-06-03 19:59:39,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:59:39,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:59:39,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:59:40,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:59:40,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:59:40,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773252636] [2024-06-03 19:59:40,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773252636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:59:40,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:59:40,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:59:40,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100798125] [2024-06-03 19:59:40,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:59:40,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:59:40,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:59:40,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:59:40,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:59:40,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 19:59:40,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 496 transitions, 5425 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:40,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:59:40,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 19:59:40,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:59:42,250 INFO L124 PetriNetUnfolderBase]: 3964/6126 cut-off events. [2024-06-03 19:59:42,251 INFO L125 PetriNetUnfolderBase]: For 1075784/1075793 co-relation queries the response was YES. [2024-06-03 19:59:42,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50262 conditions, 6126 events. 3964/6126 cut-off events. For 1075784/1075793 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 35045 event pairs, 814 based on Foata normal form. 8/6119 useless extension candidates. Maximal degree in co-relation 50083. Up to 5968 conditions per place. [2024-06-03 19:59:42,331 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 456 selfloop transitions, 48 changer transitions 0/507 dead transitions. [2024-06-03 19:59:42,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 507 transitions, 6461 flow [2024-06-03 19:59:42,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:59:42,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:59:42,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-03 19:59:42,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3567073170731707 [2024-06-03 19:59:42,332 INFO L175 Difference]: Start difference. First operand has 398 places, 496 transitions, 5425 flow. Second operand 8 states and 117 transitions. [2024-06-03 19:59:42,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 507 transitions, 6461 flow [2024-06-03 19:59:47,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 507 transitions, 6322 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-03 19:59:47,117 INFO L231 Difference]: Finished difference. Result has 401 places, 496 transitions, 5387 flow [2024-06-03 19:59:47,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5286, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5387, PETRI_PLACES=401, PETRI_TRANSITIONS=496} [2024-06-03 19:59:47,117 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 359 predicate places. [2024-06-03 19:59:47,117 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 496 transitions, 5387 flow [2024-06-03 19:59:47,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:47,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:59:47,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:59:47,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 19:59:47,118 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)] === [2024-06-03 19:59:47,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:59:47,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1835569313, now seen corresponding path program 1 times [2024-06-03 19:59:47,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:59:47,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703072462] [2024-06-03 19:59:47,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:59:47,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:59:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:59:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:59:48,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:59:48,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703072462] [2024-06-03 19:59:48,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703072462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:59:48,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:59:48,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:59:48,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721817685] [2024-06-03 19:59:48,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:59:48,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:59:48,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:59:48,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:59:48,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:59:48,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:59:48,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 496 transitions, 5387 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:48,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:59:48,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:59:48,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:59:49,824 INFO L124 PetriNetUnfolderBase]: 3952/6174 cut-off events. [2024-06-03 19:59:49,824 INFO L125 PetriNetUnfolderBase]: For 1261572/1261581 co-relation queries the response was YES. [2024-06-03 19:59:49,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52813 conditions, 6174 events. 3952/6174 cut-off events. For 1261572/1261581 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 36082 event pairs, 781 based on Foata normal form. 12/6182 useless extension candidates. Maximal degree in co-relation 52632. Up to 5762 conditions per place. [2024-06-03 19:59:49,908 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 452 selfloop transitions, 28 changer transitions 0/535 dead transitions. [2024-06-03 19:59:49,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 535 transitions, 6829 flow [2024-06-03 19:59:49,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:59:49,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:59:49,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-03 19:59:49,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-03 19:59:49,909 INFO L175 Difference]: Start difference. First operand has 401 places, 496 transitions, 5387 flow. Second operand 10 states and 164 transitions. [2024-06-03 19:59:49,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 535 transitions, 6829 flow [2024-06-03 19:59:54,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 535 transitions, 6710 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-03 19:59:54,872 INFO L231 Difference]: Finished difference. Result has 404 places, 498 transitions, 5382 flow [2024-06-03 19:59:54,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5268, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5382, PETRI_PLACES=404, PETRI_TRANSITIONS=498} [2024-06-03 19:59:54,872 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-03 19:59:54,872 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 498 transitions, 5382 flow [2024-06-03 19:59:54,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:54,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:59:54,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:59:54,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 19:59:54,873 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)] === [2024-06-03 19:59:54,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:59:54,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1835629763, now seen corresponding path program 2 times [2024-06-03 19:59:54,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:59:54,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650570763] [2024-06-03 19:59:54,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:59:54,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:59:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:59:55,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:59:55,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:59:55,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650570763] [2024-06-03 19:59:55,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650570763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:59:55,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:59:55,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:59:55,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845766578] [2024-06-03 19:59:55,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:59:55,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:59:55,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:59:55,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:59:55,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:59:55,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:59:55,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 498 transitions, 5382 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:55,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:59:55,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:59:55,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:59:57,538 INFO L124 PetriNetUnfolderBase]: 3985/6227 cut-off events. [2024-06-03 19:59:57,538 INFO L125 PetriNetUnfolderBase]: For 1283918/1283927 co-relation queries the response was YES. [2024-06-03 19:59:57,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53247 conditions, 6227 events. 3985/6227 cut-off events. For 1283918/1283927 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 36494 event pairs, 817 based on Foata normal form. 13/6237 useless extension candidates. Maximal degree in co-relation 53065. Up to 5923 conditions per place. [2024-06-03 19:59:57,619 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 447 selfloop transitions, 26 changer transitions 0/528 dead transitions. [2024-06-03 19:59:57,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 528 transitions, 6478 flow [2024-06-03 19:59:57,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:59:57,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:59:57,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-03 19:59:57,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3829268292682927 [2024-06-03 19:59:57,620 INFO L175 Difference]: Start difference. First operand has 404 places, 498 transitions, 5382 flow. Second operand 10 states and 157 transitions. [2024-06-03 19:59:57,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 528 transitions, 6478 flow [2024-06-03 20:00:02,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 528 transitions, 6437 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-03 20:00:02,725 INFO L231 Difference]: Finished difference. Result has 408 places, 499 transitions, 5428 flow [2024-06-03 20:00:02,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5341, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5428, PETRI_PLACES=408, PETRI_TRANSITIONS=499} [2024-06-03 20:00:02,726 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-03 20:00:02,726 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 499 transitions, 5428 flow [2024-06-03 20:00:02,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:00:02,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:02,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:02,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 20:00:02,726 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)] === [2024-06-03 20:00:02,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:02,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1838426273, now seen corresponding path program 3 times [2024-06-03 20:00:02,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:02,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500694935] [2024-06-03 20:00:02,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:02,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:03,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:03,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:03,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500694935] [2024-06-03 20:00:03,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500694935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:03,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:03,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:00:03,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275668566] [2024-06-03 20:00:03,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:03,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:00:03,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:03,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:00:03,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:00:04,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:00:04,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 499 transitions, 5428 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:00:04,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:04,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:00:04,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:05,682 INFO L124 PetriNetUnfolderBase]: 3952/6180 cut-off events. [2024-06-03 20:00:05,682 INFO L125 PetriNetUnfolderBase]: For 1223282/1223290 co-relation queries the response was YES. [2024-06-03 20:00:05,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51445 conditions, 6180 events. 3952/6180 cut-off events. For 1223282/1223290 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 36242 event pairs, 806 based on Foata normal form. 16/6191 useless extension candidates. Maximal degree in co-relation 51261. Up to 5877 conditions per place. [2024-06-03 20:00:05,766 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 449 selfloop transitions, 20 changer transitions 0/524 dead transitions. [2024-06-03 20:00:05,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 524 transitions, 6506 flow [2024-06-03 20:00:05,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:00:05,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:00:05,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-03 20:00:05,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-03 20:00:05,768 INFO L175 Difference]: Start difference. First operand has 408 places, 499 transitions, 5428 flow. Second operand 9 states and 141 transitions. [2024-06-03 20:00:05,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 524 transitions, 6506 flow [2024-06-03 20:00:11,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 524 transitions, 6445 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-03 20:00:11,359 INFO L231 Difference]: Finished difference. Result has 409 places, 499 transitions, 5413 flow [2024-06-03 20:00:11,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5367, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5413, PETRI_PLACES=409, PETRI_TRANSITIONS=499} [2024-06-03 20:00:11,359 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-03 20:00:11,360 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 499 transitions, 5413 flow [2024-06-03 20:00:11,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:00:11,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:11,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:11,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 20:00:11,360 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)] === [2024-06-03 20:00:11,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:11,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1953902141, now seen corresponding path program 1 times [2024-06-03 20:00:11,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:11,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543917677] [2024-06-03 20:00:11,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:11,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:11,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:12,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:12,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:12,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543917677] [2024-06-03 20:00:12,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543917677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:12,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:12,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:00:12,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491057320] [2024-06-03 20:00:12,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:12,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:00:12,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:12,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:00:12,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:00:12,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:00:12,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 499 transitions, 5413 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:00:12,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:12,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:00:12,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:14,008 INFO L124 PetriNetUnfolderBase]: 4104/6340 cut-off events. [2024-06-03 20:00:14,008 INFO L125 PetriNetUnfolderBase]: For 1153760/1153760 co-relation queries the response was YES. [2024-06-03 20:00:14,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52493 conditions, 6340 events. 4104/6340 cut-off events. For 1153760/1153760 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 36500 event pairs, 833 based on Foata normal form. 2/6339 useless extension candidates. Maximal degree in co-relation 52308. Up to 6272 conditions per place. [2024-06-03 20:00:14,094 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 486 selfloop transitions, 28 changer transitions 0/517 dead transitions. [2024-06-03 20:00:14,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 517 transitions, 6539 flow [2024-06-03 20:00:14,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:00:14,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:00:14,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-03 20:00:14,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3628048780487805 [2024-06-03 20:00:14,101 INFO L175 Difference]: Start difference. First operand has 409 places, 499 transitions, 5413 flow. Second operand 8 states and 119 transitions. [2024-06-03 20:00:14,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 517 transitions, 6539 flow [2024-06-03 20:00:19,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 517 transitions, 6489 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 20:00:19,809 INFO L231 Difference]: Finished difference. Result has 409 places, 501 transitions, 5476 flow [2024-06-03 20:00:19,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5363, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5476, PETRI_PLACES=409, PETRI_TRANSITIONS=501} [2024-06-03 20:00:19,810 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-03 20:00:19,810 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 501 transitions, 5476 flow [2024-06-03 20:00:19,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:00:19,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:19,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:19,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 20:00:19,810 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)] === [2024-06-03 20:00:19,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:19,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1953717443, now seen corresponding path program 4 times [2024-06-03 20:00:19,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:19,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714053394] [2024-06-03 20:00:19,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:19,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:20,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:20,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:20,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714053394] [2024-06-03 20:00:20,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714053394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:20,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:20,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:00:20,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061341557] [2024-06-03 20:00:20,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:20,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:00:20,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:20,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:00:20,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:00:21,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:00:21,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 501 transitions, 5476 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:00:21,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:21,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:00:21,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:22,541 INFO L124 PetriNetUnfolderBase]: 4005/6260 cut-off events. [2024-06-03 20:00:22,541 INFO L125 PetriNetUnfolderBase]: For 1261963/1261971 co-relation queries the response was YES. [2024-06-03 20:00:22,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52400 conditions, 6260 events. 4005/6260 cut-off events. For 1261963/1261971 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 36778 event pairs, 807 based on Foata normal form. 16/6268 useless extension candidates. Maximal degree in co-relation 52214. Up to 5911 conditions per place. [2024-06-03 20:00:22,629 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 428 selfloop transitions, 43 changer transitions 0/526 dead transitions. [2024-06-03 20:00:22,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 526 transitions, 6590 flow [2024-06-03 20:00:22,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:00:22,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:00:22,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-03 20:00:22,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:00:22,630 INFO L175 Difference]: Start difference. First operand has 409 places, 501 transitions, 5476 flow. Second operand 9 states and 144 transitions. [2024-06-03 20:00:22,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 526 transitions, 6590 flow [2024-06-03 20:00:27,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 526 transitions, 6493 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-03 20:00:27,610 INFO L231 Difference]: Finished difference. Result has 412 places, 502 transitions, 5503 flow [2024-06-03 20:00:27,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5379, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5503, PETRI_PLACES=412, PETRI_TRANSITIONS=502} [2024-06-03 20:00:27,610 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-03 20:00:27,611 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 502 transitions, 5503 flow [2024-06-03 20:00:27,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:00:27,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:27,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:27,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 20:00:27,611 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)] === [2024-06-03 20:00:27,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:27,611 INFO L85 PathProgramCache]: Analyzing trace with hash -115527333, now seen corresponding path program 2 times [2024-06-03 20:00:27,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:27,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182907745] [2024-06-03 20:00:27,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:27,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:28,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:28,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:28,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182907745] [2024-06-03 20:00:28,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182907745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:28,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:28,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:00:28,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049747673] [2024-06-03 20:00:28,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:28,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:00:28,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:28,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:00:28,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:00:28,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:00:28,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 502 transitions, 5503 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:00:28,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:28,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:00:28,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:30,178 INFO L124 PetriNetUnfolderBase]: 4164/6432 cut-off events. [2024-06-03 20:00:30,179 INFO L125 PetriNetUnfolderBase]: For 1191974/1191974 co-relation queries the response was YES. [2024-06-03 20:00:30,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53756 conditions, 6432 events. 4164/6432 cut-off events. For 1191974/1191974 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 37132 event pairs, 857 based on Foata normal form. 2/6431 useless extension candidates. Maximal degree in co-relation 53569. Up to 6382 conditions per place. [2024-06-03 20:00:30,266 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 493 selfloop transitions, 21 changer transitions 0/517 dead transitions. [2024-06-03 20:00:30,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 517 transitions, 6625 flow [2024-06-03 20:00:30,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:00:30,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:00:30,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2024-06-03 20:00:30,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3475609756097561 [2024-06-03 20:00:30,267 INFO L175 Difference]: Start difference. First operand has 412 places, 502 transitions, 5503 flow. Second operand 8 states and 114 transitions. [2024-06-03 20:00:30,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 517 transitions, 6625 flow [2024-06-03 20:00:35,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 517 transitions, 6533 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-03 20:00:35,982 INFO L231 Difference]: Finished difference. Result has 413 places, 504 transitions, 5516 flow [2024-06-03 20:00:35,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5411, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5516, PETRI_PLACES=413, PETRI_TRANSITIONS=504} [2024-06-03 20:00:35,983 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 371 predicate places. [2024-06-03 20:00:35,983 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 504 transitions, 5516 flow [2024-06-03 20:00:35,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:00:35,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:35,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:35,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 20:00:35,983 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)] === [2024-06-03 20:00:35,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:35,984 INFO L85 PathProgramCache]: Analyzing trace with hash 378416323, now seen corresponding path program 5 times [2024-06-03 20:00:35,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:35,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016437118] [2024-06-03 20:00:35,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:35,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:35,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:36,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:36,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016437118] [2024-06-03 20:00:36,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016437118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:36,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:36,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:00:36,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77864639] [2024-06-03 20:00:36,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:36,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:00:36,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:36,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:00:36,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:00:37,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:00:37,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 504 transitions, 5516 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:00:37,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:37,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:00:37,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:38,631 INFO L124 PetriNetUnfolderBase]: 4017/6287 cut-off events. [2024-06-03 20:00:38,632 INFO L125 PetriNetUnfolderBase]: For 1244077/1244089 co-relation queries the response was YES. [2024-06-03 20:00:38,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52144 conditions, 6287 events. 4017/6287 cut-off events. For 1244077/1244089 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 37036 event pairs, 816 based on Foata normal form. 13/6295 useless extension candidates. Maximal degree in co-relation 51956. Up to 5968 conditions per place. [2024-06-03 20:00:38,718 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 435 selfloop transitions, 38 changer transitions 0/528 dead transitions. [2024-06-03 20:00:38,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 528 transitions, 6902 flow [2024-06-03 20:00:38,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:00:38,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:00:38,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-03 20:00:38,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37398373983739835 [2024-06-03 20:00:38,719 INFO L175 Difference]: Start difference. First operand has 413 places, 504 transitions, 5516 flow. Second operand 9 states and 138 transitions. [2024-06-03 20:00:38,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 528 transitions, 6902 flow [2024-06-03 20:00:44,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 528 transitions, 6813 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-03 20:00:44,064 INFO L231 Difference]: Finished difference. Result has 417 places, 508 transitions, 5629 flow [2024-06-03 20:00:44,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5427, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5629, PETRI_PLACES=417, PETRI_TRANSITIONS=508} [2024-06-03 20:00:44,065 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 375 predicate places. [2024-06-03 20:00:44,065 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 508 transitions, 5629 flow [2024-06-03 20:00:44,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:00:44,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:44,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:44,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 20:00:44,066 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)] === [2024-06-03 20:00:44,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:44,066 INFO L85 PathProgramCache]: Analyzing trace with hash 606502171, now seen corresponding path program 3 times [2024-06-03 20:00:44,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:44,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969449235] [2024-06-03 20:00:44,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:44,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:44,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:45,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:45,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969449235] [2024-06-03 20:00:45,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969449235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:45,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:45,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:00:45,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816218170] [2024-06-03 20:00:45,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:45,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:00:45,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:45,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:00:45,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:00:45,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:00:45,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 508 transitions, 5629 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:00:45,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:45,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:00:45,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:46,640 INFO L124 PetriNetUnfolderBase]: 4186/6472 cut-off events. [2024-06-03 20:00:46,640 INFO L125 PetriNetUnfolderBase]: For 1196237/1196237 co-relation queries the response was YES. [2024-06-03 20:00:46,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54099 conditions, 6472 events. 4186/6472 cut-off events. For 1196237/1196237 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 37430 event pairs, 859 based on Foata normal form. 2/6471 useless extension candidates. Maximal degree in co-relation 53909. Up to 6431 conditions per place. [2024-06-03 20:00:46,728 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 503 selfloop transitions, 16 changer transitions 0/522 dead transitions. [2024-06-03 20:00:46,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 522 transitions, 6761 flow [2024-06-03 20:00:46,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:00:46,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:00:46,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 111 transitions. [2024-06-03 20:00:46,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3384146341463415 [2024-06-03 20:00:46,729 INFO L175 Difference]: Start difference. First operand has 417 places, 508 transitions, 5629 flow. Second operand 8 states and 111 transitions. [2024-06-03 20:00:46,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 522 transitions, 6761 flow [2024-06-03 20:00:52,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 522 transitions, 6629 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-03 20:00:52,834 INFO L231 Difference]: Finished difference. Result has 420 places, 510 transitions, 5598 flow [2024-06-03 20:00:52,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5497, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5598, PETRI_PLACES=420, PETRI_TRANSITIONS=510} [2024-06-03 20:00:52,834 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-03 20:00:52,834 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 510 transitions, 5598 flow [2024-06-03 20:00:52,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:00:52,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:52,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:52,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 20:00:52,835 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)] === [2024-06-03 20:00:52,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:52,835 INFO L85 PathProgramCache]: Analyzing trace with hash 615073051, now seen corresponding path program 4 times [2024-06-03 20:00:52,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:52,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349995962] [2024-06-03 20:00:52,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:52,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:52,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:53,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:53,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349995962] [2024-06-03 20:00:53,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349995962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:53,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:53,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:00:53,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984125904] [2024-06-03 20:00:53,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:53,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:00:53,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:53,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:00:53,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:00:53,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:00:53,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 510 transitions, 5598 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:00:53,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:53,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:00:53,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:55,647 INFO L124 PetriNetUnfolderBase]: 4194/6484 cut-off events. [2024-06-03 20:00:55,647 INFO L125 PetriNetUnfolderBase]: For 1213234/1213234 co-relation queries the response was YES. [2024-06-03 20:00:55,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54172 conditions, 6484 events. 4194/6484 cut-off events. For 1213234/1213234 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 37514 event pairs, 861 based on Foata normal form. 2/6483 useless extension candidates. Maximal degree in co-relation 53980. Up to 6438 conditions per place. [2024-06-03 20:00:55,739 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 504 selfloop transitions, 17 changer transitions 0/524 dead transitions. [2024-06-03 20:00:55,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 524 transitions, 6734 flow [2024-06-03 20:00:55,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:00:55,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:00:55,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 111 transitions. [2024-06-03 20:00:55,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3384146341463415 [2024-06-03 20:00:55,741 INFO L175 Difference]: Start difference. First operand has 420 places, 510 transitions, 5598 flow. Second operand 8 states and 111 transitions. [2024-06-03 20:00:55,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 524 transitions, 6734 flow [2024-06-03 20:01:02,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 524 transitions, 6645 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-03 20:01:02,590 INFO L231 Difference]: Finished difference. Result has 422 places, 512 transitions, 5616 flow [2024-06-03 20:01:02,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5509, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5616, PETRI_PLACES=422, PETRI_TRANSITIONS=512} [2024-06-03 20:01:02,591 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 380 predicate places. [2024-06-03 20:01:02,591 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 512 transitions, 5616 flow [2024-06-03 20:01:02,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:01:02,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:02,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:02,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 20:01:02,593 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)] === [2024-06-03 20:01:02,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:02,593 INFO L85 PathProgramCache]: Analyzing trace with hash 606732811, now seen corresponding path program 5 times [2024-06-03 20:01:02,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:02,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118011824] [2024-06-03 20:01:02,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:02,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:02,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:03,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:03,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:03,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118011824] [2024-06-03 20:01:03,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118011824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:03,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:03,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:01:03,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281859153] [2024-06-03 20:01:03,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:03,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:01:03,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:03,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:01:03,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:01:03,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:01:03,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 512 transitions, 5616 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:01:03,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:03,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:01:03,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:05,174 INFO L124 PetriNetUnfolderBase]: 4189/6477 cut-off events. [2024-06-03 20:01:05,175 INFO L125 PetriNetUnfolderBase]: For 1215573/1215573 co-relation queries the response was YES. [2024-06-03 20:01:05,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53984 conditions, 6477 events. 4189/6477 cut-off events. For 1215573/1215573 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 37478 event pairs, 862 based on Foata normal form. 2/6476 useless extension candidates. Maximal degree in co-relation 53791. Up to 6424 conditions per place. [2024-06-03 20:01:05,264 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 500 selfloop transitions, 23 changer transitions 0/526 dead transitions. [2024-06-03 20:01:05,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 526 transitions, 6764 flow [2024-06-03 20:01:05,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:01:05,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:01:05,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-06-03 20:01:05,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34146341463414637 [2024-06-03 20:01:05,265 INFO L175 Difference]: Start difference. First operand has 422 places, 512 transitions, 5616 flow. Second operand 8 states and 112 transitions. [2024-06-03 20:01:05,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 526 transitions, 6764 flow [2024-06-03 20:01:11,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 526 transitions, 6673 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-03 20:01:11,652 INFO L231 Difference]: Finished difference. Result has 424 places, 514 transitions, 5651 flow [2024-06-03 20:01:11,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5525, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5651, PETRI_PLACES=424, PETRI_TRANSITIONS=514} [2024-06-03 20:01:11,653 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 382 predicate places. [2024-06-03 20:01:11,653 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 514 transitions, 5651 flow [2024-06-03 20:01:11,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:01:11,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:11,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:11,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 20:01:11,653 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)] === [2024-06-03 20:01:11,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:11,654 INFO L85 PathProgramCache]: Analyzing trace with hash 614776133, now seen corresponding path program 1 times [2024-06-03 20:01:11,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:11,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130479318] [2024-06-03 20:01:11,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:11,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:11,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:12,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:12,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:12,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130479318] [2024-06-03 20:01:12,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130479318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:12,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:12,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:01:12,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451036781] [2024-06-03 20:01:12,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:12,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:01:12,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:12,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:01:12,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:01:12,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:01:12,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 514 transitions, 5651 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:01:12,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:12,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:01:12,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:14,441 INFO L124 PetriNetUnfolderBase]: 4184/6466 cut-off events. [2024-06-03 20:01:14,441 INFO L125 PetriNetUnfolderBase]: For 1217332/1217332 co-relation queries the response was YES. [2024-06-03 20:01:14,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53890 conditions, 6466 events. 4184/6466 cut-off events. For 1217332/1217332 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 37376 event pairs, 854 based on Foata normal form. 1/6464 useless extension candidates. Maximal degree in co-relation 53696. Up to 6414 conditions per place. [2024-06-03 20:01:14,537 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 501 selfloop transitions, 25 changer transitions 0/529 dead transitions. [2024-06-03 20:01:14,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 529 transitions, 6775 flow [2024-06-03 20:01:14,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:01:14,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:01:14,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 113 transitions. [2024-06-03 20:01:14,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3445121951219512 [2024-06-03 20:01:14,538 INFO L175 Difference]: Start difference. First operand has 424 places, 514 transitions, 5651 flow. Second operand 8 states and 113 transitions. [2024-06-03 20:01:14,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 529 transitions, 6775 flow [2024-06-03 20:01:20,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 529 transitions, 6623 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-03 20:01:20,248 INFO L231 Difference]: Finished difference. Result has 426 places, 517 transitions, 5599 flow [2024-06-03 20:01:20,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5499, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5599, PETRI_PLACES=426, PETRI_TRANSITIONS=517} [2024-06-03 20:01:20,248 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 384 predicate places. [2024-06-03 20:01:20,249 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 517 transitions, 5599 flow [2024-06-03 20:01:20,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:01:20,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:20,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:20,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 20:01:20,249 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)] === [2024-06-03 20:01:20,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:20,249 INFO L85 PathProgramCache]: Analyzing trace with hash 250266232, now seen corresponding path program 1 times [2024-06-03 20:01:20,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:20,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671945958] [2024-06-03 20:01:20,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:20,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:20,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:21,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:21,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:21,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671945958] [2024-06-03 20:01:21,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671945958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:21,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:21,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:01:21,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259979649] [2024-06-03 20:01:21,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:21,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:01:21,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:21,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:01:21,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:01:21,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:01:21,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 517 transitions, 5599 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:01:21,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:21,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:01:21,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:22,974 INFO L124 PetriNetUnfolderBase]: 4181/6458 cut-off events. [2024-06-03 20:01:22,974 INFO L125 PetriNetUnfolderBase]: For 1206914/1206922 co-relation queries the response was YES. [2024-06-03 20:01:23,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53517 conditions, 6458 events. 4181/6458 cut-off events. For 1206914/1206922 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 37320 event pairs, 814 based on Foata normal form. 9/6464 useless extension candidates. Maximal degree in co-relation 53322. Up to 6226 conditions per place. [2024-06-03 20:01:23,075 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 472 selfloop transitions, 69 changer transitions 0/544 dead transitions. [2024-06-03 20:01:23,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 544 transitions, 7021 flow [2024-06-03 20:01:23,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:01:23,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:01:23,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 20:01:23,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-03 20:01:23,077 INFO L175 Difference]: Start difference. First operand has 426 places, 517 transitions, 5599 flow. Second operand 8 states and 133 transitions. [2024-06-03 20:01:23,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 544 transitions, 7021 flow [2024-06-03 20:01:29,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 544 transitions, 6954 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-03 20:01:29,005 INFO L231 Difference]: Finished difference. Result has 427 places, 517 transitions, 5680 flow [2024-06-03 20:01:29,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5532, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5680, PETRI_PLACES=427, PETRI_TRANSITIONS=517} [2024-06-03 20:01:29,006 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-03 20:01:29,006 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 517 transitions, 5680 flow [2024-06-03 20:01:29,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:01:29,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:29,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:29,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 20:01:29,007 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)] === [2024-06-03 20:01:29,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:29,007 INFO L85 PathProgramCache]: Analyzing trace with hash 255980152, now seen corresponding path program 2 times [2024-06-03 20:01:29,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:29,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871705684] [2024-06-03 20:01:29,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:29,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:29,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:29,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:29,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:29,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871705684] [2024-06-03 20:01:29,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871705684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:29,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:29,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:01:29,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300894139] [2024-06-03 20:01:29,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:29,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:01:29,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:29,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:01:29,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:01:30,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:01:30,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 517 transitions, 5680 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:01:30,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:30,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:01:30,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:31,643 INFO L124 PetriNetUnfolderBase]: 4186/6465 cut-off events. [2024-06-03 20:01:31,644 INFO L125 PetriNetUnfolderBase]: For 1225512/1225520 co-relation queries the response was YES. [2024-06-03 20:01:31,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53865 conditions, 6465 events. 4186/6465 cut-off events. For 1225512/1225520 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 37361 event pairs, 832 based on Foata normal form. 9/6471 useless extension candidates. Maximal degree in co-relation 53669. Up to 6310 conditions per place. [2024-06-03 20:01:31,741 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 485 selfloop transitions, 54 changer transitions 0/542 dead transitions. [2024-06-03 20:01:31,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 542 transitions, 6863 flow [2024-06-03 20:01:31,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:01:31,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:01:31,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 20:01:31,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:01:31,743 INFO L175 Difference]: Start difference. First operand has 427 places, 517 transitions, 5680 flow. Second operand 8 states and 128 transitions. [2024-06-03 20:01:31,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 542 transitions, 6863 flow [2024-06-03 20:01:36,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 542 transitions, 6663 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-03 20:01:36,157 INFO L231 Difference]: Finished difference. Result has 426 places, 520 transitions, 5641 flow [2024-06-03 20:01:36,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5490, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5641, PETRI_PLACES=426, PETRI_TRANSITIONS=520} [2024-06-03 20:01:36,158 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 384 predicate places. [2024-06-03 20:01:36,158 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 520 transitions, 5641 flow [2024-06-03 20:01:36,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:01:36,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:36,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:36,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 20:01:36,159 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)] === [2024-06-03 20:01:36,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:36,159 INFO L85 PathProgramCache]: Analyzing trace with hash -429191093, now seen corresponding path program 1 times [2024-06-03 20:01:36,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:36,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988870997] [2024-06-03 20:01:36,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:36,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:36,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:36,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:36,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:36,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988870997] [2024-06-03 20:01:36,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988870997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:36,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:36,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:01:36,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464416274] [2024-06-03 20:01:36,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:36,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:01:36,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:36,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:01:36,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:01:37,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:01:37,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 520 transitions, 5641 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:01:37,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:37,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:01:37,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:38,699 INFO L124 PetriNetUnfolderBase]: 4196/6480 cut-off events. [2024-06-03 20:01:38,699 INFO L125 PetriNetUnfolderBase]: For 1234214/1234226 co-relation queries the response was YES. [2024-06-03 20:01:38,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53892 conditions, 6480 events. 4196/6480 cut-off events. For 1234214/1234226 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 37450 event pairs, 806 based on Foata normal form. 14/6491 useless extension candidates. Maximal degree in co-relation 53697. Up to 6313 conditions per place. [2024-06-03 20:01:38,793 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 515 selfloop transitions, 37 changer transitions 0/555 dead transitions. [2024-06-03 20:01:38,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 555 transitions, 6919 flow [2024-06-03 20:01:38,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:01:38,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:01:38,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-03 20:01:38,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-03 20:01:38,794 INFO L175 Difference]: Start difference. First operand has 426 places, 520 transitions, 5641 flow. Second operand 9 states and 143 transitions. [2024-06-03 20:01:38,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 555 transitions, 6919 flow [2024-06-03 20:01:45,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 555 transitions, 6807 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 20:01:45,441 INFO L231 Difference]: Finished difference. Result has 428 places, 523 transitions, 5683 flow [2024-06-03 20:01:45,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5529, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5683, PETRI_PLACES=428, PETRI_TRANSITIONS=523} [2024-06-03 20:01:45,441 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 386 predicate places. [2024-06-03 20:01:45,442 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 523 transitions, 5683 flow [2024-06-03 20:01:45,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:01:45,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:45,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:45,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 20:01:45,442 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)] === [2024-06-03 20:01:45,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:45,442 INFO L85 PathProgramCache]: Analyzing trace with hash 337227153, now seen corresponding path program 1 times [2024-06-03 20:01:45,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:45,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854315779] [2024-06-03 20:01:45,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:45,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:45,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:46,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:46,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:46,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854315779] [2024-06-03 20:01:46,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854315779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:46,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:46,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:01:46,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104579755] [2024-06-03 20:01:46,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:46,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:01:46,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:46,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:01:46,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:01:46,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:01:46,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 523 transitions, 5683 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:01:46,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:46,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:01:46,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:47,923 INFO L124 PetriNetUnfolderBase]: 4263/6573 cut-off events. [2024-06-03 20:01:47,923 INFO L125 PetriNetUnfolderBase]: For 1286213/1286225 co-relation queries the response was YES. [2024-06-03 20:01:47,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55487 conditions, 6573 events. 4263/6573 cut-off events. For 1286213/1286225 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 38001 event pairs, 813 based on Foata normal form. 16/6586 useless extension candidates. Maximal degree in co-relation 55292. Up to 6175 conditions per place. [2024-06-03 20:01:48,017 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 467 selfloop transitions, 104 changer transitions 0/574 dead transitions. [2024-06-03 20:01:48,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 574 transitions, 7394 flow [2024-06-03 20:01:48,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:01:48,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:01:48,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-03 20:01:48,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-03 20:01:48,019 INFO L175 Difference]: Start difference. First operand has 428 places, 523 transitions, 5683 flow. Second operand 9 states and 155 transitions. [2024-06-03 20:01:48,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 574 transitions, 7394 flow [2024-06-03 20:01:55,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 574 transitions, 7262 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-03 20:01:55,673 INFO L231 Difference]: Finished difference. Result has 431 places, 540 transitions, 5998 flow [2024-06-03 20:01:55,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5551, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5998, PETRI_PLACES=431, PETRI_TRANSITIONS=540} [2024-06-03 20:01:55,673 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-03 20:01:55,673 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 540 transitions, 5998 flow [2024-06-03 20:01:55,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:01:55,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:55,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:55,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-03 20:01:55,674 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)] === [2024-06-03 20:01:55,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:55,674 INFO L85 PathProgramCache]: Analyzing trace with hash -294888127, now seen corresponding path program 2 times [2024-06-03 20:01:55,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:55,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464680111] [2024-06-03 20:01:55,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:55,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:56,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:56,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:56,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464680111] [2024-06-03 20:01:56,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464680111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:56,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:56,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:01:56,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629609008] [2024-06-03 20:01:56,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:56,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:01:56,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:56,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:01:56,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:01:56,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:01:56,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 540 transitions, 5998 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:01:56,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:56,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:01:56,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:58,111 INFO L124 PetriNetUnfolderBase]: 4289/6609 cut-off events. [2024-06-03 20:01:58,111 INFO L125 PetriNetUnfolderBase]: For 1311134/1311146 co-relation queries the response was YES. [2024-06-03 20:01:58,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57400 conditions, 6609 events. 4289/6609 cut-off events. For 1311134/1311146 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 38258 event pairs, 813 based on Foata normal form. 14/6620 useless extension candidates. Maximal degree in co-relation 57203. Up to 6350 conditions per place. [2024-06-03 20:01:58,208 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 504 selfloop transitions, 69 changer transitions 0/576 dead transitions. [2024-06-03 20:01:58,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 576 transitions, 7660 flow [2024-06-03 20:01:58,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:01:58,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:01:58,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-03 20:01:58,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-03 20:01:58,210 INFO L175 Difference]: Start difference. First operand has 431 places, 540 transitions, 5998 flow. Second operand 9 states and 147 transitions. [2024-06-03 20:01:58,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 576 transitions, 7660 flow [2024-06-03 20:02:02,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 576 transitions, 7538 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-03 20:02:02,848 INFO L231 Difference]: Finished difference. Result has 437 places, 546 transitions, 6184 flow [2024-06-03 20:02:02,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5882, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6184, PETRI_PLACES=437, PETRI_TRANSITIONS=546} [2024-06-03 20:02:02,849 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 395 predicate places. [2024-06-03 20:02:02,849 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 546 transitions, 6184 flow [2024-06-03 20:02:02,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:02:02,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:02,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:02,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-03 20:02:02,850 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)] === [2024-06-03 20:02:02,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:02,850 INFO L85 PathProgramCache]: Analyzing trace with hash 514358673, now seen corresponding path program 2 times [2024-06-03 20:02:02,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:02,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010822641] [2024-06-03 20:02:02,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:02,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:03,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:03,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:03,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010822641] [2024-06-03 20:02:03,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010822641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:03,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:03,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:02:03,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161861380] [2024-06-03 20:02:03,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:03,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:02:03,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:03,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:02:03,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:02:03,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:02:03,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 546 transitions, 6184 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:02:03,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:03,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:02:03,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:05,339 INFO L124 PetriNetUnfolderBase]: 4341/6681 cut-off events. [2024-06-03 20:02:05,340 INFO L125 PetriNetUnfolderBase]: For 1384729/1384741 co-relation queries the response was YES. [2024-06-03 20:02:05,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58477 conditions, 6681 events. 4341/6681 cut-off events. For 1384729/1384741 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 38651 event pairs, 846 based on Foata normal form. 16/6694 useless extension candidates. Maximal degree in co-relation 58278. Up to 6359 conditions per place. [2024-06-03 20:02:05,439 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 481 selfloop transitions, 100 changer transitions 0/584 dead transitions. [2024-06-03 20:02:05,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 584 transitions, 7816 flow [2024-06-03 20:02:05,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:02:05,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:02:05,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-03 20:02:05,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-03 20:02:05,440 INFO L175 Difference]: Start difference. First operand has 437 places, 546 transitions, 6184 flow. Second operand 9 states and 151 transitions. [2024-06-03 20:02:05,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 584 transitions, 7816 flow [2024-06-03 20:02:13,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 584 transitions, 7660 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-03 20:02:13,180 INFO L231 Difference]: Finished difference. Result has 441 places, 554 transitions, 6336 flow [2024-06-03 20:02:13,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6028, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6336, PETRI_PLACES=441, PETRI_TRANSITIONS=554} [2024-06-03 20:02:13,180 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 399 predicate places. [2024-06-03 20:02:13,181 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 554 transitions, 6336 flow [2024-06-03 20:02:13,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:02:13,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:13,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:13,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-03 20:02:13,181 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)] === [2024-06-03 20:02:13,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:13,181 INFO L85 PathProgramCache]: Analyzing trace with hash -251702267, now seen corresponding path program 3 times [2024-06-03 20:02:13,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:13,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348426039] [2024-06-03 20:02:13,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:13,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:13,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:13,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:13,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348426039] [2024-06-03 20:02:13,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348426039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:13,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:13,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:02:13,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766393922] [2024-06-03 20:02:13,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:13,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:02:13,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:13,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:02:13,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:02:14,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:02:14,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 554 transitions, 6336 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:02:14,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:14,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:02:14,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:15,764 INFO L124 PetriNetUnfolderBase]: 4329/6665 cut-off events. [2024-06-03 20:02:15,764 INFO L125 PetriNetUnfolderBase]: For 1369259/1369271 co-relation queries the response was YES. [2024-06-03 20:02:15,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58182 conditions, 6665 events. 4329/6665 cut-off events. For 1369259/1369271 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 38581 event pairs, 852 based on Foata normal form. 16/6678 useless extension candidates. Maximal degree in co-relation 57981. Up to 6373 conditions per place. [2024-06-03 20:02:15,864 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 483 selfloop transitions, 95 changer transitions 0/581 dead transitions. [2024-06-03 20:02:15,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 581 transitions, 7590 flow [2024-06-03 20:02:15,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:02:15,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:02:15,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-03 20:02:15,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-03 20:02:15,865 INFO L175 Difference]: Start difference. First operand has 441 places, 554 transitions, 6336 flow. Second operand 9 states and 146 transitions. [2024-06-03 20:02:15,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 581 transitions, 7590 flow [2024-06-03 20:02:22,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 581 transitions, 7422 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-03 20:02:22,694 INFO L231 Difference]: Finished difference. Result has 446 places, 554 transitions, 6364 flow [2024-06-03 20:02:22,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6168, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6364, PETRI_PLACES=446, PETRI_TRANSITIONS=554} [2024-06-03 20:02:22,695 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 404 predicate places. [2024-06-03 20:02:22,695 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 554 transitions, 6364 flow [2024-06-03 20:02:22,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:02:22,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:22,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:22,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-03 20:02:22,696 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)] === [2024-06-03 20:02:22,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:22,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1846171787, now seen corresponding path program 3 times [2024-06-03 20:02:22,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:22,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167779737] [2024-06-03 20:02:22,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:22,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:22,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:23,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:23,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:23,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167779737] [2024-06-03 20:02:23,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167779737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:23,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:23,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:02:23,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117696809] [2024-06-03 20:02:23,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:23,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:02:23,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:23,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:02:23,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:02:23,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:02:23,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 554 transitions, 6364 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:02:23,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:23,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:02:23,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:25,253 INFO L124 PetriNetUnfolderBase]: 4339/6679 cut-off events. [2024-06-03 20:02:25,253 INFO L125 PetriNetUnfolderBase]: For 1371345/1371357 co-relation queries the response was YES. [2024-06-03 20:02:25,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58565 conditions, 6679 events. 4339/6679 cut-off events. For 1371345/1371357 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 38675 event pairs, 846 based on Foata normal form. 14/6690 useless extension candidates. Maximal degree in co-relation 58362. Up to 6518 conditions per place. [2024-06-03 20:02:25,353 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 524 selfloop transitions, 55 changer transitions 0/582 dead transitions. [2024-06-03 20:02:25,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 582 transitions, 7666 flow [2024-06-03 20:02:25,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:02:25,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:02:25,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-03 20:02:25,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37669376693766937 [2024-06-03 20:02:25,354 INFO L175 Difference]: Start difference. First operand has 446 places, 554 transitions, 6364 flow. Second operand 9 states and 139 transitions. [2024-06-03 20:02:25,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 582 transitions, 7666 flow [2024-06-03 20:02:34,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 582 transitions, 7462 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 20:02:34,135 INFO L231 Difference]: Finished difference. Result has 447 places, 557 transitions, 6344 flow [2024-06-03 20:02:34,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6160, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6344, PETRI_PLACES=447, PETRI_TRANSITIONS=557} [2024-06-03 20:02:34,135 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 405 predicate places. [2024-06-03 20:02:34,135 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 557 transitions, 6344 flow [2024-06-03 20:02:34,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:02:34,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:34,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:34,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-03 20:02:34,136 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)] === [2024-06-03 20:02:34,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:34,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1150132119, now seen corresponding path program 4 times [2024-06-03 20:02:34,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:34,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581836150] [2024-06-03 20:02:34,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:34,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:34,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:34,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:34,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:34,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581836150] [2024-06-03 20:02:34,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581836150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:34,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:34,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:02:34,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934248273] [2024-06-03 20:02:34,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:34,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:02:34,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:34,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:02:34,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:02:34,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:02:34,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 557 transitions, 6344 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:02:34,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:34,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:02:34,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:36,747 INFO L124 PetriNetUnfolderBase]: 4349/6694 cut-off events. [2024-06-03 20:02:36,747 INFO L125 PetriNetUnfolderBase]: For 1392234/1392238 co-relation queries the response was YES. [2024-06-03 20:02:36,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58726 conditions, 6694 events. 4349/6694 cut-off events. For 1392234/1392238 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 38790 event pairs, 794 based on Foata normal form. 6/6697 useless extension candidates. Maximal degree in co-relation 58522. Up to 6311 conditions per place. [2024-06-03 20:02:36,858 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 520 selfloop transitions, 66 changer transitions 0/589 dead transitions. [2024-06-03 20:02:36,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 589 transitions, 7688 flow [2024-06-03 20:02:36,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:02:36,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:02:36,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-03 20:02:36,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-03 20:02:36,859 INFO L175 Difference]: Start difference. First operand has 447 places, 557 transitions, 6344 flow. Second operand 9 states and 147 transitions. [2024-06-03 20:02:36,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 589 transitions, 7688 flow [2024-06-03 20:02:45,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 589 transitions, 7532 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-03 20:02:45,583 INFO L231 Difference]: Finished difference. Result has 449 places, 560 transitions, 6414 flow [2024-06-03 20:02:45,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6188, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6414, PETRI_PLACES=449, PETRI_TRANSITIONS=560} [2024-06-03 20:02:45,583 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 407 predicate places. [2024-06-03 20:02:45,583 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 560 transitions, 6414 flow [2024-06-03 20:02:45,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:02:45,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:45,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:45,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-03 20:02:45,584 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)] === [2024-06-03 20:02:45,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:45,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1830804193, now seen corresponding path program 5 times [2024-06-03 20:02:45,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:45,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857018466] [2024-06-03 20:02:45,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:45,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:46,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:46,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857018466] [2024-06-03 20:02:46,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857018466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:46,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:46,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:02:46,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128510954] [2024-06-03 20:02:46,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:46,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:02:46,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:46,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:02:46,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:02:46,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:02:46,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 560 transitions, 6414 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:02:46,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:46,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:02:46,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:48,185 INFO L124 PetriNetUnfolderBase]: 4455/6840 cut-off events. [2024-06-03 20:02:48,185 INFO L125 PetriNetUnfolderBase]: For 1526772/1526776 co-relation queries the response was YES. [2024-06-03 20:02:48,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62432 conditions, 6840 events. 4455/6840 cut-off events. For 1526772/1526776 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 39608 event pairs, 799 based on Foata normal form. 6/6843 useless extension candidates. Maximal degree in co-relation 62227. Up to 6137 conditions per place. [2024-06-03 20:02:48,298 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 473 selfloop transitions, 129 changer transitions 0/605 dead transitions. [2024-06-03 20:02:48,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 605 transitions, 8946 flow [2024-06-03 20:02:48,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:02:48,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:02:48,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-03 20:02:48,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 20:02:48,300 INFO L175 Difference]: Start difference. First operand has 449 places, 560 transitions, 6414 flow. Second operand 9 states and 153 transitions. [2024-06-03 20:02:48,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 605 transitions, 8946 flow [2024-06-03 20:02:56,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 605 transitions, 8742 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-03 20:02:56,721 INFO L231 Difference]: Finished difference. Result has 452 places, 576 transitions, 6998 flow [2024-06-03 20:02:56,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6210, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6998, PETRI_PLACES=452, PETRI_TRANSITIONS=576} [2024-06-03 20:02:56,722 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-03 20:02:56,722 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 576 transitions, 6998 flow [2024-06-03 20:02:56,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:02:56,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:56,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:56,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-03 20:02:56,722 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)] === [2024-06-03 20:02:56,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:56,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1830804379, now seen corresponding path program 4 times [2024-06-03 20:02:56,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:56,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698952012] [2024-06-03 20:02:56,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:56,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:56,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:57,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:57,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:57,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698952012] [2024-06-03 20:02:57,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698952012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:57,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:57,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:02:57,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255282443] [2024-06-03 20:02:57,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:57,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:02:57,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:57,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:02:57,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:02:57,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:02:57,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 576 transitions, 6998 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:02:57,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:57,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:02:57,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:59,461 INFO L124 PetriNetUnfolderBase]: 4539/6956 cut-off events. [2024-06-03 20:02:59,461 INFO L125 PetriNetUnfolderBase]: For 1652205/1652209 co-relation queries the response was YES. [2024-06-03 20:02:59,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65901 conditions, 6956 events. 4539/6956 cut-off events. For 1652205/1652209 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 40297 event pairs, 831 based on Foata normal form. 8/6961 useless extension candidates. Maximal degree in co-relation 65694. Up to 6256 conditions per place. [2024-06-03 20:02:59,594 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 467 selfloop transitions, 149 changer transitions 0/619 dead transitions. [2024-06-03 20:02:59,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 619 transitions, 9174 flow [2024-06-03 20:02:59,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:02:59,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:02:59,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-03 20:02:59,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-03 20:02:59,595 INFO L175 Difference]: Start difference. First operand has 452 places, 576 transitions, 6998 flow. Second operand 9 states and 155 transitions. [2024-06-03 20:02:59,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 619 transitions, 9174 flow [2024-06-03 20:03:07,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 619 transitions, 8948 flow, removed 93 selfloop flow, removed 3 redundant places. [2024-06-03 20:03:07,512 INFO L231 Difference]: Finished difference. Result has 459 places, 586 transitions, 7460 flow [2024-06-03 20:03:07,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6780, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7460, PETRI_PLACES=459, PETRI_TRANSITIONS=586} [2024-06-03 20:03:07,529 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 417 predicate places. [2024-06-03 20:03:07,529 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 586 transitions, 7460 flow [2024-06-03 20:03:07,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:03:07,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:07,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:07,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-03 20:03:07,529 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)] === [2024-06-03 20:03:07,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:07,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1010586743, now seen corresponding path program 6 times [2024-06-03 20:03:07,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:07,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209936193] [2024-06-03 20:03:07,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:07,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:07,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:08,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:08,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:08,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209936193] [2024-06-03 20:03:08,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209936193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:08,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:08,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:03:08,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99580196] [2024-06-03 20:03:08,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:08,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:03:08,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:08,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:03:08,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:03:08,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:03:08,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 586 transitions, 7460 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:03:08,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:08,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:03:08,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:10,538 INFO L124 PetriNetUnfolderBase]: 4591/7028 cut-off events. [2024-06-03 20:03:10,538 INFO L125 PetriNetUnfolderBase]: For 1711148/1711152 co-relation queries the response was YES. [2024-06-03 20:03:10,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67610 conditions, 7028 events. 4591/7028 cut-off events. For 1711148/1711152 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 40781 event pairs, 807 based on Foata normal form. 8/7033 useless extension candidates. Maximal degree in co-relation 67400. Up to 6547 conditions per place. [2024-06-03 20:03:10,659 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 545 selfloop transitions, 82 changer transitions 0/630 dead transitions. [2024-06-03 20:03:10,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 630 transitions, 9579 flow [2024-06-03 20:03:10,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:03:10,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:03:10,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-03 20:03:10,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:03:10,660 INFO L175 Difference]: Start difference. First operand has 459 places, 586 transitions, 7460 flow. Second operand 11 states and 176 transitions. [2024-06-03 20:03:10,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 630 transitions, 9579 flow [2024-06-03 20:03:18,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 630 transitions, 9307 flow, removed 97 selfloop flow, removed 4 redundant places. [2024-06-03 20:03:18,663 INFO L231 Difference]: Finished difference. Result has 468 places, 594 transitions, 7574 flow [2024-06-03 20:03:18,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7188, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7574, PETRI_PLACES=468, PETRI_TRANSITIONS=594} [2024-06-03 20:03:18,664 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 426 predicate places. [2024-06-03 20:03:18,664 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 594 transitions, 7574 flow [2024-06-03 20:03:18,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:03:18,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:18,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:18,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-03 20:03:18,664 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)] === [2024-06-03 20:03:18,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:18,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1010378206, now seen corresponding path program 1 times [2024-06-03 20:03:18,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:18,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874584658] [2024-06-03 20:03:18,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:18,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:18,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:19,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:19,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874584658] [2024-06-03 20:03:19,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874584658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:19,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:19,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:03:19,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372003107] [2024-06-03 20:03:19,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:19,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:03:19,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:19,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:03:19,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:03:19,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:03:19,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 594 transitions, 7574 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:03:19,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:19,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:03:19,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:21,794 INFO L124 PetriNetUnfolderBase]: 4588/7022 cut-off events. [2024-06-03 20:03:21,794 INFO L125 PetriNetUnfolderBase]: For 1691678/1691686 co-relation queries the response was YES. [2024-06-03 20:03:21,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67520 conditions, 7022 events. 4588/7022 cut-off events. For 1691678/1691686 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 40668 event pairs, 892 based on Foata normal form. 9/7028 useless extension candidates. Maximal degree in co-relation 67306. Up to 6943 conditions per place. [2024-06-03 20:03:21,924 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 593 selfloop transitions, 27 changer transitions 0/623 dead transitions. [2024-06-03 20:03:21,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 623 transitions, 8938 flow [2024-06-03 20:03:21,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:03:21,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:03:21,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 147 transitions. [2024-06-03 20:03:21,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35853658536585364 [2024-06-03 20:03:21,925 INFO L175 Difference]: Start difference. First operand has 468 places, 594 transitions, 7574 flow. Second operand 10 states and 147 transitions. [2024-06-03 20:03:21,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 623 transitions, 8938 flow [2024-06-03 20:03:29,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 623 transitions, 8747 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-03 20:03:29,603 INFO L231 Difference]: Finished difference. Result has 470 places, 596 transitions, 7490 flow [2024-06-03 20:03:29,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7391, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7490, PETRI_PLACES=470, PETRI_TRANSITIONS=596} [2024-06-03 20:03:29,604 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2024-06-03 20:03:29,604 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 596 transitions, 7490 flow [2024-06-03 20:03:29,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:03:29,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:29,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:29,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-03 20:03:29,604 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)] === [2024-06-03 20:03:29,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:29,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1144471209, now seen corresponding path program 7 times [2024-06-03 20:03:29,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:29,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006423712] [2024-06-03 20:03:29,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:29,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:29,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:30,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:30,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:30,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006423712] [2024-06-03 20:03:30,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006423712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:30,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:30,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:03:30,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733813404] [2024-06-03 20:03:30,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:30,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:03:30,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:30,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:03:30,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:03:30,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:03:30,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 596 transitions, 7490 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:03:30,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:30,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:03:30,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:32,416 INFO L124 PetriNetUnfolderBase]: 4576/7008 cut-off events. [2024-06-03 20:03:32,416 INFO L125 PetriNetUnfolderBase]: For 1703882/1703886 co-relation queries the response was YES. [2024-06-03 20:03:32,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66658 conditions, 7008 events. 4576/7008 cut-off events. For 1703882/1703886 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 40612 event pairs, 821 based on Foata normal form. 8/7013 useless extension candidates. Maximal degree in co-relation 66443. Up to 6537 conditions per place. [2024-06-03 20:03:32,558 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 541 selfloop transitions, 80 changer transitions 0/624 dead transitions. [2024-06-03 20:03:32,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 624 transitions, 9132 flow [2024-06-03 20:03:32,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:03:32,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:03:32,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-03 20:03:32,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-03 20:03:32,584 INFO L175 Difference]: Start difference. First operand has 470 places, 596 transitions, 7490 flow. Second operand 9 states and 146 transitions. [2024-06-03 20:03:32,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 624 transitions, 9132 flow [2024-06-03 20:03:41,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 624 transitions, 8987 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-03 20:03:41,050 INFO L231 Difference]: Finished difference. Result has 471 places, 596 transitions, 7513 flow [2024-06-03 20:03:41,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7345, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7513, PETRI_PLACES=471, PETRI_TRANSITIONS=596} [2024-06-03 20:03:41,050 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 429 predicate places. [2024-06-03 20:03:41,050 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 596 transitions, 7513 flow [2024-06-03 20:03:41,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:03:41,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:41,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:41,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-03 20:03:41,051 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)] === [2024-06-03 20:03:41,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:41,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1144470837, now seen corresponding path program 1 times [2024-06-03 20:03:41,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:41,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124519516] [2024-06-03 20:03:41,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:41,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:41,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:41,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:41,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124519516] [2024-06-03 20:03:41,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124519516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:41,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:41,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:03:41,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059827134] [2024-06-03 20:03:41,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:41,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:03:41,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:41,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:03:41,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:03:41,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:03:41,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 596 transitions, 7513 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:03:41,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:41,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:03:41,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:43,872 INFO L124 PetriNetUnfolderBase]: 4586/7020 cut-off events. [2024-06-03 20:03:43,872 INFO L125 PetriNetUnfolderBase]: For 1710903/1710911 co-relation queries the response was YES. [2024-06-03 20:03:43,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67163 conditions, 7020 events. 4586/7020 cut-off events. For 1710903/1710911 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 40633 event pairs, 891 based on Foata normal form. 10/7027 useless extension candidates. Maximal degree in co-relation 66947. Up to 6949 conditions per place. [2024-06-03 20:03:43,994 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 596 selfloop transitions, 24 changer transitions 0/623 dead transitions. [2024-06-03 20:03:43,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 623 transitions, 8941 flow [2024-06-03 20:03:43,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:03:43,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:03:43,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-03 20:03:43,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36314363143631434 [2024-06-03 20:03:43,995 INFO L175 Difference]: Start difference. First operand has 471 places, 596 transitions, 7513 flow. Second operand 9 states and 134 transitions. [2024-06-03 20:03:43,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 623 transitions, 8941 flow [2024-06-03 20:03:51,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 623 transitions, 8781 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 20:03:51,159 INFO L231 Difference]: Finished difference. Result has 472 places, 599 transitions, 7523 flow [2024-06-03 20:03:51,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7353, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7523, PETRI_PLACES=472, PETRI_TRANSITIONS=599} [2024-06-03 20:03:51,159 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 430 predicate places. [2024-06-03 20:03:51,159 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 599 transitions, 7523 flow [2024-06-03 20:03:51,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:03:51,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:51,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:51,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-03 20:03:51,160 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)] === [2024-06-03 20:03:51,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:51,160 INFO L85 PathProgramCache]: Analyzing trace with hash -374448097, now seen corresponding path program 2 times [2024-06-03 20:03:51,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:51,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124864986] [2024-06-03 20:03:51,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:51,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:51,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:51,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:51,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124864986] [2024-06-03 20:03:51,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124864986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:51,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:51,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:03:51,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376293924] [2024-06-03 20:03:51,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:51,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:03:51,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:51,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:03:51,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:03:52,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:03:52,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 599 transitions, 7523 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:03:52,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:52,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:03:52,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:54,024 INFO L124 PetriNetUnfolderBase]: 4628/7078 cut-off events. [2024-06-03 20:03:54,025 INFO L125 PetriNetUnfolderBase]: For 1776934/1776942 co-relation queries the response was YES. [2024-06-03 20:03:54,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68791 conditions, 7078 events. 4628/7078 cut-off events. For 1776934/1776942 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 41020 event pairs, 893 based on Foata normal form. 10/7085 useless extension candidates. Maximal degree in co-relation 68574. Up to 6882 conditions per place. [2024-06-03 20:03:54,143 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 559 selfloop transitions, 71 changer transitions 0/633 dead transitions. [2024-06-03 20:03:54,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 633 transitions, 9783 flow [2024-06-03 20:03:54,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:03:54,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:03:54,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-03 20:03:54,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:03:54,144 INFO L175 Difference]: Start difference. First operand has 472 places, 599 transitions, 7523 flow. Second operand 9 states and 144 transitions. [2024-06-03 20:03:54,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 633 transitions, 9783 flow [2024-06-03 20:04:02,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 633 transitions, 9643 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-03 20:04:02,269 INFO L231 Difference]: Finished difference. Result has 475 places, 608 transitions, 7885 flow [2024-06-03 20:04:02,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7383, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7885, PETRI_PLACES=475, PETRI_TRANSITIONS=608} [2024-06-03 20:04:02,270 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 433 predicate places. [2024-06-03 20:04:02,270 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 608 transitions, 7885 flow [2024-06-03 20:04:02,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:04:02,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:02,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:02,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-03 20:04:02,270 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)] === [2024-06-03 20:04:02,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:02,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1140746373, now seen corresponding path program 5 times [2024-06-03 20:04:02,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:02,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619949612] [2024-06-03 20:04:02,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:02,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:02,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:03,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:03,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:03,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619949612] [2024-06-03 20:04:03,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619949612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:03,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:03,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:04:03,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451978812] [2024-06-03 20:04:03,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:03,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:04:03,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:03,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:04:03,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:04:03,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:04:03,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 608 transitions, 7885 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:04:03,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:03,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:04:03,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:05,045 INFO L124 PetriNetUnfolderBase]: 4696/7174 cut-off events. [2024-06-03 20:04:05,045 INFO L125 PetriNetUnfolderBase]: For 1886317/1886321 co-relation queries the response was YES. [2024-06-03 20:04:05,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70692 conditions, 7174 events. 4696/7174 cut-off events. For 1886317/1886321 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 41557 event pairs, 830 based on Foata normal form. 8/7179 useless extension candidates. Maximal degree in co-relation 70474. Up to 6435 conditions per place. [2024-06-03 20:04:05,178 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 489 selfloop transitions, 155 changer transitions 0/647 dead transitions. [2024-06-03 20:04:05,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 647 transitions, 10004 flow [2024-06-03 20:04:05,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:04:05,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:04:05,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-03 20:04:05,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-03 20:04:05,180 INFO L175 Difference]: Start difference. First operand has 475 places, 608 transitions, 7885 flow. Second operand 9 states and 152 transitions. [2024-06-03 20:04:05,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 647 transitions, 10004 flow [2024-06-03 20:04:15,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 647 transitions, 9789 flow, removed 87 selfloop flow, removed 4 redundant places. [2024-06-03 20:04:15,115 INFO L231 Difference]: Finished difference. Result has 480 places, 617 transitions, 8139 flow [2024-06-03 20:04:15,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7670, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8139, PETRI_PLACES=480, PETRI_TRANSITIONS=617} [2024-06-03 20:04:15,115 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-03 20:04:15,115 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 617 transitions, 8139 flow [2024-06-03 20:04:15,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:04:15,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:15,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:15,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-03 20:04:15,116 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)] === [2024-06-03 20:04:15,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:15,116 INFO L85 PathProgramCache]: Analyzing trace with hash -374459443, now seen corresponding path program 6 times [2024-06-03 20:04:15,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:15,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220242842] [2024-06-03 20:04:15,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:15,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:15,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:15,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:15,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:15,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220242842] [2024-06-03 20:04:15,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220242842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:15,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:15,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:04:15,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762718407] [2024-06-03 20:04:15,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:15,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:04:15,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:15,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:04:15,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:04:16,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:04:16,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 617 transitions, 8139 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:04:16,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:16,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:04:16,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:17,924 INFO L124 PetriNetUnfolderBase]: 4684/7158 cut-off events. [2024-06-03 20:04:17,924 INFO L125 PetriNetUnfolderBase]: For 1869961/1869965 co-relation queries the response was YES. [2024-06-03 20:04:18,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70471 conditions, 7158 events. 4684/7158 cut-off events. For 1869961/1869965 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 41462 event pairs, 836 based on Foata normal form. 8/7163 useless extension candidates. Maximal degree in co-relation 70251. Up to 6427 conditions per place. [2024-06-03 20:04:18,052 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 493 selfloop transitions, 152 changer transitions 0/648 dead transitions. [2024-06-03 20:04:18,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 648 transitions, 10119 flow [2024-06-03 20:04:18,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:04:18,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:04:18,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-03 20:04:18,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-03 20:04:18,053 INFO L175 Difference]: Start difference. First operand has 480 places, 617 transitions, 8139 flow. Second operand 9 states and 154 transitions. [2024-06-03 20:04:18,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 648 transitions, 10119 flow [2024-06-03 20:04:25,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 648 transitions, 9869 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-03 20:04:25,607 INFO L231 Difference]: Finished difference. Result has 484 places, 617 transitions, 8199 flow [2024-06-03 20:04:25,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7889, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8199, PETRI_PLACES=484, PETRI_TRANSITIONS=617} [2024-06-03 20:04:25,608 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 442 predicate places. [2024-06-03 20:04:25,608 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 617 transitions, 8199 flow [2024-06-03 20:04:25,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:04:25,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:25,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:25,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-03 20:04:25,609 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)] === [2024-06-03 20:04:25,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:25,609 INFO L85 PathProgramCache]: Analyzing trace with hash -374459629, now seen corresponding path program 8 times [2024-06-03 20:04:25,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:25,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106413402] [2024-06-03 20:04:25,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:25,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:26,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:26,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:26,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106413402] [2024-06-03 20:04:26,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106413402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:26,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:26,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:04:26,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413646144] [2024-06-03 20:04:26,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:26,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:04:26,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:26,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:04:26,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:04:26,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:04:26,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 617 transitions, 8199 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:04:26,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:26,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:04:26,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:28,398 INFO L124 PetriNetUnfolderBase]: 4758/7260 cut-off events. [2024-06-03 20:04:28,398 INFO L125 PetriNetUnfolderBase]: For 1956903/1956907 co-relation queries the response was YES. [2024-06-03 20:04:28,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72794 conditions, 7260 events. 4758/7260 cut-off events. For 1956903/1956907 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 42072 event pairs, 826 based on Foata normal form. 6/7263 useless extension candidates. Maximal degree in co-relation 72573. Up to 6493 conditions per place. [2024-06-03 20:04:28,539 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 505 selfloop transitions, 147 changer transitions 0/655 dead transitions. [2024-06-03 20:04:28,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 655 transitions, 10743 flow [2024-06-03 20:04:28,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:04:28,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:04:28,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-03 20:04:28,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-03 20:04:28,541 INFO L175 Difference]: Start difference. First operand has 484 places, 617 transitions, 8199 flow. Second operand 9 states and 150 transitions. [2024-06-03 20:04:28,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 655 transitions, 10743 flow [2024-06-03 20:04:37,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 655 transitions, 10529 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-03 20:04:37,578 INFO L231 Difference]: Finished difference. Result has 489 places, 628 transitions, 8600 flow [2024-06-03 20:04:37,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7985, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8600, PETRI_PLACES=489, PETRI_TRANSITIONS=628} [2024-06-03 20:04:37,578 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 447 predicate places. [2024-06-03 20:04:37,578 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 628 transitions, 8600 flow [2024-06-03 20:04:37,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:04:37,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:37,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:37,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-03 20:04:37,579 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)] === [2024-06-03 20:04:37,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:37,579 INFO L85 PathProgramCache]: Analyzing trace with hash -374454049, now seen corresponding path program 9 times [2024-06-03 20:04:37,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:37,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503349558] [2024-06-03 20:04:37,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:37,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:37,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:38,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:38,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503349558] [2024-06-03 20:04:38,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503349558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:38,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:38,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:04:38,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346325145] [2024-06-03 20:04:38,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:38,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:04:38,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:38,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:04:38,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:04:38,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:04:38,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 628 transitions, 8600 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:04:38,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:38,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:04:38,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:40,437 INFO L124 PetriNetUnfolderBase]: 4750/7250 cut-off events. [2024-06-03 20:04:40,438 INFO L125 PetriNetUnfolderBase]: For 1963397/1963401 co-relation queries the response was YES. [2024-06-03 20:04:40,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72515 conditions, 7250 events. 4750/7250 cut-off events. For 1963397/1963401 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 41985 event pairs, 827 based on Foata normal form. 8/7255 useless extension candidates. Maximal degree in co-relation 72292. Up to 6490 conditions per place. [2024-06-03 20:04:40,573 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 507 selfloop transitions, 146 changer transitions 0/656 dead transitions. [2024-06-03 20:04:40,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 656 transitions, 10932 flow [2024-06-03 20:04:40,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:04:40,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:04:40,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-03 20:04:40,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-03 20:04:40,575 INFO L175 Difference]: Start difference. First operand has 489 places, 628 transitions, 8600 flow. Second operand 9 states and 151 transitions. [2024-06-03 20:04:40,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 656 transitions, 10932 flow [2024-06-03 20:04:47,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 656 transitions, 10652 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-06-03 20:04:47,058 INFO L231 Difference]: Finished difference. Result has 494 places, 628 transitions, 8620 flow [2024-06-03 20:04:47,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8320, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8620, PETRI_PLACES=494, PETRI_TRANSITIONS=628} [2024-06-03 20:04:47,058 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-03 20:04:47,059 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 628 transitions, 8620 flow [2024-06-03 20:04:47,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:04:47,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:47,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:47,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-03 20:04:47,059 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)] === [2024-06-03 20:04:47,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:47,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1006568771, now seen corresponding path program 3 times [2024-06-03 20:04:47,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:47,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150830388] [2024-06-03 20:04:47,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:47,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:47,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:47,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:47,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150830388] [2024-06-03 20:04:47,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150830388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:47,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:47,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:04:47,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854187004] [2024-06-03 20:04:47,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:47,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:04:47,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:47,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:04:47,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:04:47,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:04:47,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 628 transitions, 8620 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:04:47,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:47,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:04:47,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:50,123 INFO L124 PetriNetUnfolderBase]: 4744/7240 cut-off events. [2024-06-03 20:04:50,124 INFO L125 PetriNetUnfolderBase]: For 1948309/1948317 co-relation queries the response was YES. [2024-06-03 20:04:50,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72148 conditions, 7240 events. 4744/7240 cut-off events. For 1948309/1948317 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 41948 event pairs, 906 based on Foata normal form. 10/7247 useless extension candidates. Maximal degree in co-relation 71924. Up to 7047 conditions per place. [2024-06-03 20:04:50,239 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 580 selfloop transitions, 70 changer transitions 0/653 dead transitions. [2024-06-03 20:04:50,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 653 transitions, 10306 flow [2024-06-03 20:04:50,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:04:50,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:04:50,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-03 20:04:50,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-03 20:04:50,240 INFO L175 Difference]: Start difference. First operand has 494 places, 628 transitions, 8620 flow. Second operand 9 states and 145 transitions. [2024-06-03 20:04:50,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 653 transitions, 10306 flow [2024-06-03 20:04:59,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 653 transitions, 9926 flow, removed 45 selfloop flow, removed 8 redundant places. [2024-06-03 20:04:59,610 INFO L231 Difference]: Finished difference. Result has 495 places, 628 transitions, 8386 flow [2024-06-03 20:04:59,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8240, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8386, PETRI_PLACES=495, PETRI_TRANSITIONS=628} [2024-06-03 20:04:59,611 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 453 predicate places. [2024-06-03 20:04:59,611 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 628 transitions, 8386 flow [2024-06-03 20:04:59,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:04:59,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:59,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:59,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-03 20:04:59,611 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)] === [2024-06-03 20:04:59,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:59,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1840064420, now seen corresponding path program 2 times [2024-06-03 20:04:59,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:59,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319036059] [2024-06-03 20:04:59,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:59,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:59,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:00,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:00,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319036059] [2024-06-03 20:05:00,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319036059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:00,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:00,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:05:00,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694420958] [2024-06-03 20:05:00,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:00,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:05:00,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:00,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:05:00,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:05:00,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:05:00,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 628 transitions, 8386 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:05:00,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:00,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:05:00,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:02,619 INFO L124 PetriNetUnfolderBase]: 4733/7227 cut-off events. [2024-06-03 20:05:02,619 INFO L125 PetriNetUnfolderBase]: For 1948825/1948829 co-relation queries the response was YES. [2024-06-03 20:05:02,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71200 conditions, 7227 events. 4733/7227 cut-off events. For 1948825/1948829 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 41903 event pairs, 829 based on Foata normal form. 7/7231 useless extension candidates. Maximal degree in co-relation 70976. Up to 6685 conditions per place. [2024-06-03 20:05:02,753 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 523 selfloop transitions, 144 changer transitions 0/670 dead transitions. [2024-06-03 20:05:02,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 670 transitions, 10956 flow [2024-06-03 20:05:02,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:05:02,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:05:02,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-03 20:05:02,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-03 20:05:02,755 INFO L175 Difference]: Start difference. First operand has 495 places, 628 transitions, 8386 flow. Second operand 9 states and 148 transitions. [2024-06-03 20:05:02,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 670 transitions, 10956 flow [2024-06-03 20:05:11,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 670 transitions, 10825 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-03 20:05:11,456 INFO L231 Difference]: Finished difference. Result has 500 places, 644 transitions, 8990 flow [2024-06-03 20:05:11,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8255, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8990, PETRI_PLACES=500, PETRI_TRANSITIONS=644} [2024-06-03 20:05:11,456 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 458 predicate places. [2024-06-03 20:05:11,456 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 644 transitions, 8990 flow [2024-06-03 20:05:11,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:05:11,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:11,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:11,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-03 20:05:11,457 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)] === [2024-06-03 20:05:11,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:11,457 INFO L85 PathProgramCache]: Analyzing trace with hash 185725666, now seen corresponding path program 3 times [2024-06-03 20:05:11,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:11,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466506023] [2024-06-03 20:05:11,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:11,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:11,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:12,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:12,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:12,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466506023] [2024-06-03 20:05:12,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466506023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:12,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:12,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:05:12,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220920313] [2024-06-03 20:05:12,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:12,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:05:12,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:12,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:05:12,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:05:12,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:05:12,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 644 transitions, 8990 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:05:12,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:12,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:05:12,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:14,430 INFO L124 PetriNetUnfolderBase]: 4730/7223 cut-off events. [2024-06-03 20:05:14,430 INFO L125 PetriNetUnfolderBase]: For 1945841/1945845 co-relation queries the response was YES. [2024-06-03 20:05:14,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71902 conditions, 7223 events. 4730/7223 cut-off events. For 1945841/1945845 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 41838 event pairs, 907 based on Foata normal form. 5/7225 useless extension candidates. Maximal degree in co-relation 71674. Up to 7066 conditions per place. [2024-06-03 20:05:14,575 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 605 selfloop transitions, 52 changer transitions 0/660 dead transitions. [2024-06-03 20:05:14,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 660 transitions, 10350 flow [2024-06-03 20:05:14,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:05:14,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:05:14,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-03 20:05:14,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-03 20:05:14,577 INFO L175 Difference]: Start difference. First operand has 500 places, 644 transitions, 8990 flow. Second operand 8 states and 124 transitions. [2024-06-03 20:05:14,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 660 transitions, 10350 flow [2024-06-03 20:05:21,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 660 transitions, 10143 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-03 20:05:21,192 INFO L231 Difference]: Finished difference. Result has 504 places, 644 transitions, 8897 flow [2024-06-03 20:05:21,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8783, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8897, PETRI_PLACES=504, PETRI_TRANSITIONS=644} [2024-06-03 20:05:21,192 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 462 predicate places. [2024-06-03 20:05:21,192 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 644 transitions, 8897 flow [2024-06-03 20:05:21,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:05:21,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:21,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:21,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-03 20:05:21,193 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)] === [2024-06-03 20:05:21,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:21,193 INFO L85 PathProgramCache]: Analyzing trace with hash 828893221, now seen corresponding path program 7 times [2024-06-03 20:05:21,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:21,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632455155] [2024-06-03 20:05:21,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:21,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:21,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:21,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:21,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:21,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632455155] [2024-06-03 20:05:21,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632455155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:21,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:21,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:05:21,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115654594] [2024-06-03 20:05:21,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:21,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:05:21,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:21,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:05:21,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:05:21,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:05:21,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 644 transitions, 8897 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:05:21,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:21,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:05:21,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:24,282 INFO L124 PetriNetUnfolderBase]: 4750/7251 cut-off events. [2024-06-03 20:05:24,282 INFO L125 PetriNetUnfolderBase]: For 2004464/2004468 co-relation queries the response was YES. [2024-06-03 20:05:24,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71969 conditions, 7251 events. 4750/7251 cut-off events. For 2004464/2004468 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 42028 event pairs, 909 based on Foata normal form. 8/7256 useless extension candidates. Maximal degree in co-relation 71740. Up to 6956 conditions per place. [2024-06-03 20:05:24,398 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 581 selfloop transitions, 89 changer transitions 0/673 dead transitions. [2024-06-03 20:05:24,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 673 transitions, 10404 flow [2024-06-03 20:05:24,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:05:24,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:05:24,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-03 20:05:24,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-03 20:05:24,400 INFO L175 Difference]: Start difference. First operand has 504 places, 644 transitions, 8897 flow. Second operand 9 states and 143 transitions. [2024-06-03 20:05:24,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 673 transitions, 10404 flow [2024-06-03 20:05:31,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 673 transitions, 10276 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-03 20:05:31,757 INFO L231 Difference]: Finished difference. Result has 506 places, 649 transitions, 9044 flow [2024-06-03 20:05:31,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8769, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9044, PETRI_PLACES=506, PETRI_TRANSITIONS=649} [2024-06-03 20:05:31,758 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 464 predicate places. [2024-06-03 20:05:31,758 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 649 transitions, 9044 flow [2024-06-03 20:05:31,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:05:31,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:31,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:31,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-03 20:05:31,759 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)] === [2024-06-03 20:05:31,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:31,759 INFO L85 PathProgramCache]: Analyzing trace with hash 197165410, now seen corresponding path program 1 times [2024-06-03 20:05:31,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:31,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535638718] [2024-06-03 20:05:31,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:31,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:31,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:32,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:32,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:32,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535638718] [2024-06-03 20:05:32,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535638718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:32,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:32,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:05:32,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046209633] [2024-06-03 20:05:32,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:32,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:05:32,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:32,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:05:32,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:05:32,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:05:32,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 649 transitions, 9044 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:05:32,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:32,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:05:32,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:34,729 INFO L124 PetriNetUnfolderBase]: 4755/7256 cut-off events. [2024-06-03 20:05:34,729 INFO L125 PetriNetUnfolderBase]: For 1972358/1972366 co-relation queries the response was YES. [2024-06-03 20:05:34,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72238 conditions, 7256 events. 4755/7256 cut-off events. For 1972358/1972366 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 42100 event pairs, 901 based on Foata normal form. 9/7262 useless extension candidates. Maximal degree in co-relation 72008. Up to 7171 conditions per place. [2024-06-03 20:05:34,871 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 622 selfloop transitions, 44 changer transitions 0/669 dead transitions. [2024-06-03 20:05:34,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 669 transitions, 10509 flow [2024-06-03 20:05:34,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:05:34,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:05:34,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-03 20:05:34,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-03 20:05:34,872 INFO L175 Difference]: Start difference. First operand has 506 places, 649 transitions, 9044 flow. Second operand 8 states and 124 transitions. [2024-06-03 20:05:34,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 669 transitions, 10509 flow [2024-06-03 20:05:43,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 669 transitions, 10326 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-03 20:05:43,706 INFO L231 Difference]: Finished difference. Result has 509 places, 652 transitions, 9042 flow [2024-06-03 20:05:43,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8861, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9042, PETRI_PLACES=509, PETRI_TRANSITIONS=652} [2024-06-03 20:05:43,706 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 467 predicate places. [2024-06-03 20:05:43,707 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 652 transitions, 9042 flow [2024-06-03 20:05:43,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:05:43,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:43,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:43,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-03 20:05:43,707 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)] === [2024-06-03 20:05:43,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:43,707 INFO L85 PathProgramCache]: Analyzing trace with hash 829013191, now seen corresponding path program 8 times [2024-06-03 20:05:43,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:43,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245535834] [2024-06-03 20:05:43,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:43,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:44,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:44,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:44,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245535834] [2024-06-03 20:05:44,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245535834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:44,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:44,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:05:44,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118799621] [2024-06-03 20:05:44,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:44,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:05:44,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:44,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:05:44,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:05:44,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:05:44,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 652 transitions, 9042 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:05:44,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:44,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:05:44,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:46,546 INFO L124 PetriNetUnfolderBase]: 4831/7363 cut-off events. [2024-06-03 20:05:46,546 INFO L125 PetriNetUnfolderBase]: For 2112924/2112928 co-relation queries the response was YES. [2024-06-03 20:05:46,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74084 conditions, 7363 events. 4831/7363 cut-off events. For 2112924/2112928 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 42677 event pairs, 922 based on Foata normal form. 8/7368 useless extension candidates. Maximal degree in co-relation 73853. Up to 6975 conditions per place. [2024-06-03 20:05:46,688 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 582 selfloop transitions, 103 changer transitions 0/688 dead transitions. [2024-06-03 20:05:46,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 688 transitions, 11014 flow [2024-06-03 20:05:46,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:05:46,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:05:46,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-03 20:05:46,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-03 20:05:46,690 INFO L175 Difference]: Start difference. First operand has 509 places, 652 transitions, 9042 flow. Second operand 9 states and 146 transitions. [2024-06-03 20:05:46,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 688 transitions, 11014 flow [2024-06-03 20:05:55,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 688 transitions, 10874 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-03 20:05:55,443 INFO L231 Difference]: Finished difference. Result has 512 places, 661 transitions, 9353 flow [2024-06-03 20:05:55,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8904, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9353, PETRI_PLACES=512, PETRI_TRANSITIONS=661} [2024-06-03 20:05:55,443 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 470 predicate places. [2024-06-03 20:05:55,443 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 661 transitions, 9353 flow [2024-06-03 20:05:55,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:05:55,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:55,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:55,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-03 20:05:55,444 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)] === [2024-06-03 20:05:55,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:55,444 INFO L85 PathProgramCache]: Analyzing trace with hash 186053367, now seen corresponding path program 9 times [2024-06-03 20:05:55,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:55,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459055185] [2024-06-03 20:05:55,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:55,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:56,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:56,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:56,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459055185] [2024-06-03 20:05:56,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459055185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:56,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:56,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:05:56,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784671977] [2024-06-03 20:05:56,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:56,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:05:56,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:56,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:05:56,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:05:56,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:05:56,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 661 transitions, 9353 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:05:56,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:56,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:05:56,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:58,532 INFO L124 PetriNetUnfolderBase]: 4819/7347 cut-off events. [2024-06-03 20:05:58,532 INFO L125 PetriNetUnfolderBase]: For 2070551/2070555 co-relation queries the response was YES. [2024-06-03 20:05:58,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73732 conditions, 7347 events. 4819/7347 cut-off events. For 2070551/2070555 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 42625 event pairs, 922 based on Foata normal form. 8/7352 useless extension candidates. Maximal degree in co-relation 73500. Up to 7054 conditions per place. [2024-06-03 20:05:58,668 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 593 selfloop transitions, 89 changer transitions 0/685 dead transitions. [2024-06-03 20:05:58,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 685 transitions, 10813 flow [2024-06-03 20:05:58,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:05:58,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:05:58,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-03 20:05:58,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-03 20:05:58,669 INFO L175 Difference]: Start difference. First operand has 512 places, 661 transitions, 9353 flow. Second operand 9 states and 143 transitions. [2024-06-03 20:05:58,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 685 transitions, 10813 flow [2024-06-03 20:06:07,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 685 transitions, 10588 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-03 20:06:07,864 INFO L231 Difference]: Finished difference. Result has 516 places, 663 transitions, 9336 flow [2024-06-03 20:06:07,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9128, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9336, PETRI_PLACES=516, PETRI_TRANSITIONS=663} [2024-06-03 20:06:07,865 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 474 predicate places. [2024-06-03 20:06:07,865 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 663 transitions, 9336 flow [2024-06-03 20:06:07,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:06:07,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:07,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:07,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-03 20:06:07,865 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)] === [2024-06-03 20:06:07,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:07,866 INFO L85 PathProgramCache]: Analyzing trace with hash 821655775, now seen corresponding path program 10 times [2024-06-03 20:06:07,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:07,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113433071] [2024-06-03 20:06:07,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:07,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:07,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:08,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:08,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:08,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113433071] [2024-06-03 20:06:08,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113433071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:08,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:08,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:08,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95043397] [2024-06-03 20:06:08,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:08,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:08,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:08,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:08,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:08,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:08,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 663 transitions, 9336 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:06:08,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:08,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:08,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:10,743 INFO L124 PetriNetUnfolderBase]: 4907/7469 cut-off events. [2024-06-03 20:06:10,743 INFO L125 PetriNetUnfolderBase]: For 2185655/2185659 co-relation queries the response was YES. [2024-06-03 20:06:10,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76212 conditions, 7469 events. 4907/7469 cut-off events. For 2185655/2185659 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 43375 event pairs, 920 based on Foata normal form. 8/7474 useless extension candidates. Maximal degree in co-relation 75978. Up to 7207 conditions per place. [2024-06-03 20:06:10,890 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 617 selfloop transitions, 82 changer transitions 0/702 dead transitions. [2024-06-03 20:06:10,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 702 transitions, 11574 flow [2024-06-03 20:06:10,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:06:10,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:06:10,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-03 20:06:10,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-03 20:06:10,891 INFO L175 Difference]: Start difference. First operand has 516 places, 663 transitions, 9336 flow. Second operand 9 states and 141 transitions. [2024-06-03 20:06:10,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 702 transitions, 11574 flow [2024-06-03 20:06:18,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 702 transitions, 11397 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-03 20:06:18,461 INFO L231 Difference]: Finished difference. Result has 521 places, 679 transitions, 9743 flow [2024-06-03 20:06:18,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9159, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9743, PETRI_PLACES=521, PETRI_TRANSITIONS=679} [2024-06-03 20:06:18,461 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 479 predicate places. [2024-06-03 20:06:18,461 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 679 transitions, 9743 flow [2024-06-03 20:06:18,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:06:18,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:18,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:18,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-03 20:06:18,462 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)] === [2024-06-03 20:06:18,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:18,462 INFO L85 PathProgramCache]: Analyzing trace with hash 817931125, now seen corresponding path program 11 times [2024-06-03 20:06:18,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:18,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282034748] [2024-06-03 20:06:18,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:18,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:19,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:19,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:19,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282034748] [2024-06-03 20:06:19,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282034748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:19,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:19,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:19,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73442319] [2024-06-03 20:06:19,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:19,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:19,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:19,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:19,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:19,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:19,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 679 transitions, 9743 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:06:19,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:19,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:19,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:21,508 INFO L124 PetriNetUnfolderBase]: 4901/7461 cut-off events. [2024-06-03 20:06:21,508 INFO L125 PetriNetUnfolderBase]: For 2168823/2168827 co-relation queries the response was YES. [2024-06-03 20:06:21,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76063 conditions, 7461 events. 4901/7461 cut-off events. For 2168823/2168827 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 43241 event pairs, 923 based on Foata normal form. 6/7464 useless extension candidates. Maximal degree in co-relation 75827. Up to 7299 conditions per place. [2024-06-03 20:06:21,668 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 642 selfloop transitions, 53 changer transitions 0/698 dead transitions. [2024-06-03 20:06:21,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 698 transitions, 11223 flow [2024-06-03 20:06:21,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:06:21,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:06:21,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-03 20:06:21,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-03 20:06:21,669 INFO L175 Difference]: Start difference. First operand has 521 places, 679 transitions, 9743 flow. Second operand 9 states and 135 transitions. [2024-06-03 20:06:21,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 698 transitions, 11223 flow [2024-06-03 20:06:30,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 698 transitions, 11005 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-06-03 20:06:30,026 INFO L231 Difference]: Finished difference. Result has 525 places, 680 transitions, 9677 flow [2024-06-03 20:06:30,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9525, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9677, PETRI_PLACES=525, PETRI_TRANSITIONS=680} [2024-06-03 20:06:30,027 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 483 predicate places. [2024-06-03 20:06:30,027 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 680 transitions, 9677 flow [2024-06-03 20:06:30,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:06:30,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:30,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:30,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-03 20:06:30,028 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)] === [2024-06-03 20:06:30,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:30,028 INFO L85 PathProgramCache]: Analyzing trace with hash 821656147, now seen corresponding path program 4 times [2024-06-03 20:06:30,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:30,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99629268] [2024-06-03 20:06:30,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:30,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:30,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:30,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:30,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99629268] [2024-06-03 20:06:30,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99629268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:30,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:30,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:30,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794546304] [2024-06-03 20:06:30,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:30,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:30,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:30,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:30,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:30,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:30,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 680 transitions, 9677 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:06:30,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:30,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:30,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:33,160 INFO L124 PetriNetUnfolderBase]: 4927/7495 cut-off events. [2024-06-03 20:06:33,160 INFO L125 PetriNetUnfolderBase]: For 2219778/2219786 co-relation queries the response was YES. [2024-06-03 20:06:33,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76897 conditions, 7495 events. 4927/7495 cut-off events. For 2219778/2219786 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 43517 event pairs, 922 based on Foata normal form. 10/7502 useless extension candidates. Maximal degree in co-relation 76659. Up to 7394 conditions per place. [2024-06-03 20:06:33,307 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 658 selfloop transitions, 46 changer transitions 0/707 dead transitions. [2024-06-03 20:06:33,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 707 transitions, 11665 flow [2024-06-03 20:06:33,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:06:33,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:06:33,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-03 20:06:33,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37398373983739835 [2024-06-03 20:06:33,309 INFO L175 Difference]: Start difference. First operand has 525 places, 680 transitions, 9677 flow. Second operand 9 states and 138 transitions. [2024-06-03 20:06:33,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 707 transitions, 11665 flow [2024-06-03 20:06:40,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 707 transitions, 11515 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-03 20:06:40,855 INFO L231 Difference]: Finished difference. Result has 527 places, 686 transitions, 9829 flow [2024-06-03 20:06:40,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9527, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9829, PETRI_PLACES=527, PETRI_TRANSITIONS=686} [2024-06-03 20:06:40,855 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 485 predicate places. [2024-06-03 20:06:40,856 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 686 transitions, 9829 flow [2024-06-03 20:06:40,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:06:40,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:40,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:40,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-03 20:06:40,856 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)] === [2024-06-03 20:06:40,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:40,856 INFO L85 PathProgramCache]: Analyzing trace with hash 829013377, now seen corresponding path program 5 times [2024-06-03 20:06:40,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:40,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133549824] [2024-06-03 20:06:40,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:40,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:40,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:41,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:41,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:41,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133549824] [2024-06-03 20:06:41,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133549824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:41,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:41,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:41,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459003529] [2024-06-03 20:06:41,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:41,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:41,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:41,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:41,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:41,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:41,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 686 transitions, 9829 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:06:41,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:41,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:41,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:43,766 INFO L124 PetriNetUnfolderBase]: 4937/7509 cut-off events. [2024-06-03 20:06:43,766 INFO L125 PetriNetUnfolderBase]: For 2248153/2248161 co-relation queries the response was YES. [2024-06-03 20:06:43,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77204 conditions, 7509 events. 4937/7509 cut-off events. For 2248153/2248161 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 43506 event pairs, 925 based on Foata normal form. 10/7516 useless extension candidates. Maximal degree in co-relation 76965. Up to 7433 conditions per place. [2024-06-03 20:06:43,923 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 669 selfloop transitions, 36 changer transitions 0/708 dead transitions. [2024-06-03 20:06:43,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 708 transitions, 11410 flow [2024-06-03 20:06:43,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:06:43,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:06:43,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-03 20:06:43,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3604336043360434 [2024-06-03 20:06:43,924 INFO L175 Difference]: Start difference. First operand has 527 places, 686 transitions, 9829 flow. Second operand 9 states and 133 transitions. [2024-06-03 20:06:43,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 708 transitions, 11410 flow [2024-06-03 20:06:52,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 708 transitions, 11257 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-03 20:06:52,566 INFO L231 Difference]: Finished difference. Result has 531 places, 689 transitions, 9865 flow [2024-06-03 20:06:52,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9688, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9865, PETRI_PLACES=531, PETRI_TRANSITIONS=689} [2024-06-03 20:06:52,567 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 489 predicate places. [2024-06-03 20:06:52,567 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 689 transitions, 9865 flow [2024-06-03 20:06:52,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:06:52,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:52,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:52,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-03 20:06:52,567 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)] === [2024-06-03 20:06:52,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:52,568 INFO L85 PathProgramCache]: Analyzing trace with hash 189546447, now seen corresponding path program 10 times [2024-06-03 20:06:52,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:52,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639482443] [2024-06-03 20:06:52,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:52,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:52,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:53,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:53,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:53,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639482443] [2024-06-03 20:06:53,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639482443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:53,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:53,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:53,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170762712] [2024-06-03 20:06:53,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:53,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:53,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:53,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:53,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:53,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:53,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 689 transitions, 9865 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:06:53,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:53,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:53,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:55,796 INFO L124 PetriNetUnfolderBase]: 5037/7649 cut-off events. [2024-06-03 20:06:55,797 INFO L125 PetriNetUnfolderBase]: For 2423827/2423831 co-relation queries the response was YES. [2024-06-03 20:06:55,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79943 conditions, 7649 events. 5037/7649 cut-off events. For 2423827/2423831 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 44405 event pairs, 921 based on Foata normal form. 8/7654 useless extension candidates. Maximal degree in co-relation 79702. Up to 7145 conditions per place. [2024-06-03 20:06:55,955 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 595 selfloop transitions, 131 changer transitions 0/729 dead transitions. [2024-06-03 20:06:55,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 729 transitions, 12313 flow [2024-06-03 20:06:55,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:06:55,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:06:55,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-03 20:06:55,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-03 20:06:55,956 INFO L175 Difference]: Start difference. First operand has 531 places, 689 transitions, 9865 flow. Second operand 9 states and 150 transitions. [2024-06-03 20:06:55,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 729 transitions, 12313 flow [2024-06-03 20:07:06,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 729 transitions, 12173 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-03 20:07:06,656 INFO L231 Difference]: Finished difference. Result has 534 places, 701 transitions, 10300 flow [2024-06-03 20:07:06,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9725, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10300, PETRI_PLACES=534, PETRI_TRANSITIONS=701} [2024-06-03 20:07:06,656 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 492 predicate places. [2024-06-03 20:07:06,656 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 701 transitions, 10300 flow [2024-06-03 20:07:06,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:07:06,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:06,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:06,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-03 20:07:06,657 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)] === [2024-06-03 20:07:06,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:06,657 INFO L85 PathProgramCache]: Analyzing trace with hash 821661727, now seen corresponding path program 6 times [2024-06-03 20:07:06,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:06,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697977038] [2024-06-03 20:07:06,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:06,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:07,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:07,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:07,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697977038] [2024-06-03 20:07:07,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697977038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:07,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:07,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:07,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057433364] [2024-06-03 20:07:07,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:07,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:07,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:07,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:07,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:07,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:07,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 701 transitions, 10300 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:07:07,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:07,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:07,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:09,851 INFO L124 PetriNetUnfolderBase]: 5031/7639 cut-off events. [2024-06-03 20:07:09,851 INFO L125 PetriNetUnfolderBase]: For 2403448/2403456 co-relation queries the response was YES. [2024-06-03 20:07:09,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80170 conditions, 7639 events. 5031/7639 cut-off events. For 2403448/2403456 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 44334 event pairs, 932 based on Foata normal form. 10/7646 useless extension candidates. Maximal degree in co-relation 79927. Up to 7537 conditions per place. [2024-06-03 20:07:10,015 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 670 selfloop transitions, 48 changer transitions 0/721 dead transitions. [2024-06-03 20:07:10,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 721 transitions, 11810 flow [2024-06-03 20:07:10,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:07:10,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:07:10,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-03 20:07:10,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37398373983739835 [2024-06-03 20:07:10,016 INFO L175 Difference]: Start difference. First operand has 534 places, 701 transitions, 10300 flow. Second operand 9 states and 138 transitions. [2024-06-03 20:07:10,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 721 transitions, 11810 flow [2024-06-03 20:07:19,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 721 transitions, 11531 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-06-03 20:07:19,405 INFO L231 Difference]: Finished difference. Result has 538 places, 701 transitions, 10123 flow [2024-06-03 20:07:19,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10021, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=653, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10123, PETRI_PLACES=538, PETRI_TRANSITIONS=701} [2024-06-03 20:07:19,405 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 496 predicate places. [2024-06-03 20:07:19,406 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 701 transitions, 10123 flow [2024-06-03 20:07:19,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:07:19,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:19,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:19,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-03 20:07:19,406 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)] === [2024-06-03 20:07:19,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:19,407 INFO L85 PathProgramCache]: Analyzing trace with hash 185816217, now seen corresponding path program 11 times [2024-06-03 20:07:19,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:19,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236213164] [2024-06-03 20:07:19,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:19,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:19,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:20,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:20,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:20,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236213164] [2024-06-03 20:07:20,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236213164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:20,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:20,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:20,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30133863] [2024-06-03 20:07:20,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:20,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:20,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:20,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:20,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:20,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:20,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 701 transitions, 10123 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:07:20,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:20,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:20,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:22,829 INFO L124 PetriNetUnfolderBase]: 5019/7625 cut-off events. [2024-06-03 20:07:22,829 INFO L125 PetriNetUnfolderBase]: For 2405272/2405276 co-relation queries the response was YES. [2024-06-03 20:07:22,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79330 conditions, 7625 events. 5019/7625 cut-off events. For 2405272/2405276 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 44276 event pairs, 933 based on Foata normal form. 8/7630 useless extension candidates. Maximal degree in co-relation 79085. Up to 7294 conditions per place. [2024-06-03 20:07:22,972 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 625 selfloop transitions, 97 changer transitions 0/725 dead transitions. [2024-06-03 20:07:22,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 725 transitions, 11659 flow [2024-06-03 20:07:22,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:07:22,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:07:22,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-03 20:07:22,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-03 20:07:22,973 INFO L175 Difference]: Start difference. First operand has 538 places, 701 transitions, 10123 flow. Second operand 9 states and 146 transitions. [2024-06-03 20:07:22,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 725 transitions, 11659 flow [2024-06-03 20:07:33,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 725 transitions, 11541 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-03 20:07:33,393 INFO L231 Difference]: Finished difference. Result has 539 places, 701 transitions, 10205 flow [2024-06-03 20:07:33,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10005, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10205, PETRI_PLACES=539, PETRI_TRANSITIONS=701} [2024-06-03 20:07:33,394 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 497 predicate places. [2024-06-03 20:07:33,394 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 701 transitions, 10205 flow [2024-06-03 20:07:33,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:07:33,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:33,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:33,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-03 20:07:33,394 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)] === [2024-06-03 20:07:33,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:33,395 INFO L85 PathProgramCache]: Analyzing trace with hash 189535101, now seen corresponding path program 12 times [2024-06-03 20:07:33,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:33,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769411869] [2024-06-03 20:07:33,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:33,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:34,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:34,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:34,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769411869] [2024-06-03 20:07:34,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769411869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:34,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:34,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:34,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193796986] [2024-06-03 20:07:34,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:34,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:34,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:34,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:34,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:34,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:34,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 701 transitions, 10205 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-03 20:07:34,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:34,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:34,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:36,618 INFO L124 PetriNetUnfolderBase]: 5013/7617 cut-off events. [2024-06-03 20:07:36,619 INFO L125 PetriNetUnfolderBase]: For 2386746/2386750 co-relation queries the response was YES. [2024-06-03 20:07:36,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79300 conditions, 7617 events. 5013/7617 cut-off events. For 2386746/2386750 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 44245 event pairs, 943 based on Foata normal form. 6/7620 useless extension candidates. Maximal degree in co-relation 79054. Up to 7365 conditions per place. [2024-06-03 20:07:36,795 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 641 selfloop transitions, 79 changer transitions 0/723 dead transitions. [2024-06-03 20:07:36,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 723 transitions, 12102 flow [2024-06-03 20:07:36,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:07:36,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:07:36,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-03 20:07:36,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38482384823848237 [2024-06-03 20:07:36,796 INFO L175 Difference]: Start difference. First operand has 539 places, 701 transitions, 10205 flow. Second operand 9 states and 142 transitions. [2024-06-03 20:07:36,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 723 transitions, 12102 flow Killed by 15