./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix042.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/mix042.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/mix042.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix042.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 15:15:35,429 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 15:15:35,513 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 15:15:35,518 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 15:15:35,518 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 15:15:35,540 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 15:15:35,540 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 15:15:35,541 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 15:15:35,541 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 15:15:35,544 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 15:15:35,544 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 15:15:35,545 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 15:15:35,545 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 15:15:35,546 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 15:15:35,546 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 15:15:35,547 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 15:15:35,547 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 15:15:35,547 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 15:15:35,547 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 15:15:35,547 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 15:15:35,548 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 15:15:35,548 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 15:15:35,548 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 15:15:35,548 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 15:15:35,548 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 15:15:35,549 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 15:15:35,549 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 15:15:35,549 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 15:15:35,549 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 15:15:35,550 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 15:15:35,550 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 15:15:35,551 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 15:15:35,551 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:15:35,551 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 15:15:35,551 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 15:15:35,551 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 15:15:35,551 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 15:15:35,551 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 15:15:35,552 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 15:15:35,552 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 15:15:35,552 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 15:15:35,552 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 15:15:35,552 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 15:15:35,552 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 15:15:35,768 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 15:15:35,788 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 15:15:35,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 15:15:35,791 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 15:15:35,792 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 15:15:35,793 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix042.oepc.yml/witness.yml [2024-06-04 15:15:35,985 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 15:15:35,985 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 15:15:35,989 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix042.oepc.i [2024-06-04 15:15:37,023 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 15:15:37,233 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 15:15:37,234 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix042.oepc.i [2024-06-04 15:15:37,248 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/986c41aa2/1b10b01ea57742a9b145fa524c1ac36e/FLAGa22609c09 [2024-06-04 15:15:37,257 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/986c41aa2/1b10b01ea57742a9b145fa524c1ac36e [2024-06-04 15:15:37,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 15:15:37,259 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 15:15:37,260 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 15:15:37,260 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 15:15:37,263 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 15:15:37,264 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:15:35" (1/2) ... [2024-06-04 15:15:37,265 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@331cfa1e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:15:37, skipping insertion in model container [2024-06-04 15:15:37,265 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:15:35" (1/2) ... [2024-06-04 15:15:37,266 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@44da6e98 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:15:37, skipping insertion in model container [2024-06-04 15:15:37,266 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:15:37" (2/2) ... [2024-06-04 15:15:37,267 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@331cfa1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:15:37, skipping insertion in model container [2024-06-04 15:15:37,267 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:15:37" (2/2) ... [2024-06-04 15:15:37,268 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 15:15:37,339 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 15:15:37,340 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((! multithreaded || a$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-04 15:15:37,340 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] (((((((((((((((((((! multithreaded || a$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-04 15:15:37,340 INFO L97 edCorrectnessWitness]: Location invariant before [L848-L848] (((((((((((((((((((! multithreaded || a$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-04 15:15:37,340 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 15:15:37,340 INFO L106 edCorrectnessWitness]: ghost_update [L844-L844] multithreaded = 1; [2024-06-04 15:15:37,378 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 15:15:37,667 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:15:37,683 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 15:15:37,807 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:15:37,853 INFO L206 MainTranslator]: Completed translation [2024-06-04 15:15:37,853 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:15:37 WrapperNode [2024-06-04 15:15:37,853 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 15:15:37,854 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 15:15:37,854 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 15:15:37,854 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 15:15:37,859 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:15:37" (1/1) ... [2024-06-04 15:15:37,871 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:15:37" (1/1) ... [2024-06-04 15:15:37,894 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 127 [2024-06-04 15:15:37,894 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 15:15:37,895 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 15:15:37,895 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 15:15:37,895 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 15:15:37,905 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:15:37" (1/1) ... [2024-06-04 15:15:37,906 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:15:37" (1/1) ... [2024-06-04 15:15:37,909 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:15:37" (1/1) ... [2024-06-04 15:15:37,931 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-04 15:15:37,932 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:15:37" (1/1) ... [2024-06-04 15:15:37,932 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:15:37" (1/1) ... [2024-06-04 15:15:37,942 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:15:37" (1/1) ... [2024-06-04 15:15:37,945 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:15:37" (1/1) ... [2024-06-04 15:15:37,947 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:15:37" (1/1) ... [2024-06-04 15:15:37,948 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:15:37" (1/1) ... [2024-06-04 15:15:37,950 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 15:15:37,951 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 15:15:37,951 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 15:15:37,951 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 15:15:37,952 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:15:37" (1/1) ... [2024-06-04 15:15:37,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:15:37,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 15:15:37,981 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-04 15:15:37,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-04 15:15:38,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 15:15:38,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 15:15:38,034 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 15:15:38,034 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 15:15:38,034 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 15:15:38,035 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 15:15:38,035 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 15:15:38,035 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 15:15:38,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 15:15:38,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 15:15:38,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 15:15:38,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 15:15:38,037 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 15:15:38,156 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 15:15:38,158 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 15:15:38,475 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 15:15:38,476 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 15:15:38,623 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 15:15:38,623 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 15:15:38,624 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:15:38 BoogieIcfgContainer [2024-06-04 15:15:38,624 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 15:15:38,626 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 15:15:38,626 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 15:15:38,628 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 15:15:38,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:15:35" (1/4) ... [2024-06-04 15:15:38,629 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b59611f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 03:15:38, skipping insertion in model container [2024-06-04 15:15:38,630 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 03:15:37" (2/4) ... [2024-06-04 15:15:38,630 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b59611f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 03:15:38, skipping insertion in model container [2024-06-04 15:15:38,630 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:15:37" (3/4) ... [2024-06-04 15:15:38,630 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b59611f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 03:15:38, skipping insertion in model container [2024-06-04 15:15:38,631 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:15:38" (4/4) ... [2024-06-04 15:15:38,631 INFO L112 eAbstractionObserver]: Analyzing ICFG mix042.oepc.i [2024-06-04 15:15:38,644 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 15:15:38,645 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 15:15:38,645 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 15:15:38,699 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 15:15:38,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-04 15:15:38,751 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-04 15:15:38,752 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:15:38,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 15:15:38,754 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-04 15:15:38,757 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-04 15:15:38,770 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 15:15:38,800 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3c259902, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 15:15:38,800 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 15:15:38,804 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 15:15:38,804 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-04 15:15:38,804 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:15:38,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:38,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 15:15:38,805 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:15:38,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:38,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1196790123, now seen corresponding path program 1 times [2024-06-04 15:15:38,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:38,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45710137] [2024-06-04 15:15:38,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:38,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:38,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:39,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:39,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:39,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45710137] [2024-06-04 15:15:39,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45710137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:39,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:39,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 15:15:39,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684443147] [2024-06-04 15:15:39,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:39,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 15:15:39,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:39,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 15:15:39,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 15:15:39,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:15:39,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:39,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:39,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:15:39,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:40,346 INFO L124 PetriNetUnfolderBase]: 1566/2407 cut-off events. [2024-06-04 15:15:40,346 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-06-04 15:15:40,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4820 conditions, 2407 events. 1566/2407 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11613 event pairs, 1097 based on Foata normal form. 1/2345 useless extension candidates. Maximal degree in co-relation 4805. Up to 2326 conditions per place. [2024-06-04 15:15:40,363 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 35 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-04 15:15:40,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 181 flow [2024-06-04 15:15:40,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 15:15:40,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 15:15:40,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-06-04 15:15:40,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-04 15:15:40,373 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 75 transitions. [2024-06-04 15:15:40,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 181 flow [2024-06-04 15:15:40,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 15:15:40,379 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-04 15:15:40,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-04 15:15:40,383 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-04 15:15:40,383 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-04 15:15:40,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:40,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:40,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:40,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 15:15:40,385 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:15:40,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:40,386 INFO L85 PathProgramCache]: Analyzing trace with hash 935955316, now seen corresponding path program 1 times [2024-06-04 15:15:40,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:40,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306422231] [2024-06-04 15:15:40,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:40,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:40,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:41,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:41,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:41,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306422231] [2024-06-04 15:15:41,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306422231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:41,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:41,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 15:15:41,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515687879] [2024-06-04 15:15:41,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:41,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 15:15:41,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:41,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 15:15:41,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-04 15:15:41,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:15:41,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:41,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:41,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:15:41,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:41,381 INFO L124 PetriNetUnfolderBase]: 1560/2398 cut-off events. [2024-06-04 15:15:41,381 INFO L125 PetriNetUnfolderBase]: For 448/448 co-relation queries the response was YES. [2024-06-04 15:15:41,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5416 conditions, 2398 events. 1560/2398 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11610 event pairs, 930 based on Foata normal form. 3/2371 useless extension candidates. Maximal degree in co-relation 5401. Up to 2302 conditions per place. [2024-06-04 15:15:41,393 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 42 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-04 15:15:41,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 248 flow [2024-06-04 15:15:41,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 15:15:41,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 15:15:41,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-04 15:15:41,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-04 15:15:41,395 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 96 transitions. [2024-06-04 15:15:41,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 248 flow [2024-06-04 15:15:41,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 15:15:41,398 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-04 15:15:41,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-04 15:15:41,399 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-04 15:15:41,399 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-04 15:15:41,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:41,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:41,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:41,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 15:15:41,400 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:15:41,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:41,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1804923987, now seen corresponding path program 1 times [2024-06-04 15:15:41,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:41,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209613957] [2024-06-04 15:15:41,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:41,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:41,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:42,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:42,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:42,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209613957] [2024-06-04 15:15:42,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209613957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:42,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:42,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:15:42,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531146228] [2024-06-04 15:15:42,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:42,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:15:42,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:42,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:15:42,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:15:42,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:15:42,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:42,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:42,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:15:42,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:42,881 INFO L124 PetriNetUnfolderBase]: 1893/2883 cut-off events. [2024-06-04 15:15:42,882 INFO L125 PetriNetUnfolderBase]: For 1453/1453 co-relation queries the response was YES. [2024-06-04 15:15:42,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7172 conditions, 2883 events. 1893/2883 cut-off events. For 1453/1453 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13805 event pairs, 878 based on Foata normal form. 3/2850 useless extension candidates. Maximal degree in co-relation 7155. Up to 2753 conditions per place. [2024-06-04 15:15:42,895 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 57 selfloop transitions, 13 changer transitions 0/74 dead transitions. [2024-06-04 15:15:42,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 74 transitions, 382 flow [2024-06-04 15:15:42,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:15:42,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:15:42,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-04 15:15:42,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5155038759689923 [2024-06-04 15:15:42,900 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 133 transitions. [2024-06-04 15:15:42,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 74 transitions, 382 flow [2024-06-04 15:15:42,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 74 transitions, 362 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-04 15:15:42,904 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-04 15:15:42,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-04 15:15:42,905 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-04 15:15:42,906 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-04 15:15:42,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:42,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:42,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:42,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 15:15:42,906 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:15:42,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:42,907 INFO L85 PathProgramCache]: Analyzing trace with hash 118069753, now seen corresponding path program 1 times [2024-06-04 15:15:42,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:42,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013440452] [2024-06-04 15:15:42,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:42,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:43,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:43,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:43,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013440452] [2024-06-04 15:15:43,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013440452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:43,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:43,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:15:43,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553554903] [2024-06-04 15:15:43,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:43,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:15:43,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:43,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:15:43,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:15:43,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:15:43,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:43,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:43,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:15:43,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:44,299 INFO L124 PetriNetUnfolderBase]: 1884/2868 cut-off events. [2024-06-04 15:15:44,300 INFO L125 PetriNetUnfolderBase]: For 2881/2881 co-relation queries the response was YES. [2024-06-04 15:15:44,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7941 conditions, 2868 events. 1884/2868 cut-off events. For 2881/2881 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13674 event pairs, 690 based on Foata normal form. 6/2838 useless extension candidates. Maximal degree in co-relation 7922. Up to 2708 conditions per place. [2024-06-04 15:15:44,317 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 61 selfloop transitions, 15 changer transitions 0/80 dead transitions. [2024-06-04 15:15:44,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 80 transitions, 442 flow [2024-06-04 15:15:44,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:15:44,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:15:44,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-04 15:15:44,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4950166112956811 [2024-06-04 15:15:44,320 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 7 states and 149 transitions. [2024-06-04 15:15:44,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 80 transitions, 442 flow [2024-06-04 15:15:44,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 80 transitions, 414 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-04 15:15:44,323 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 219 flow [2024-06-04 15:15:44,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=219, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-04 15:15:44,324 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 11 predicate places. [2024-06-04 15:15:44,324 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 219 flow [2024-06-04 15:15:44,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:44,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:44,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:44,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 15:15:44,325 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:15:44,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:44,325 INFO L85 PathProgramCache]: Analyzing trace with hash -318663339, now seen corresponding path program 1 times [2024-06-04 15:15:44,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:44,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745387392] [2024-06-04 15:15:44,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:44,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:44,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:44,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:44,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745387392] [2024-06-04 15:15:44,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745387392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:44,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:44,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:15:44,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595099663] [2024-06-04 15:15:44,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:44,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:15:44,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:44,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:15:44,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:15:44,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:15:44,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 219 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) [2024-06-04 15:15:44,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:44,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:15:44,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:45,346 INFO L124 PetriNetUnfolderBase]: 1879/2861 cut-off events. [2024-06-04 15:15:45,347 INFO L125 PetriNetUnfolderBase]: For 4336/4336 co-relation queries the response was YES. [2024-06-04 15:15:45,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8418 conditions, 2861 events. 1879/2861 cut-off events. For 4336/4336 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13595 event pairs, 812 based on Foata normal form. 2/2827 useless extension candidates. Maximal degree in co-relation 8398. Up to 2767 conditions per place. [2024-06-04 15:15:45,360 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 49 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-04 15:15:45,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 61 transitions, 377 flow [2024-06-04 15:15:45,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:15:45,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:15:45,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-04 15:15:45,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-04 15:15:45,361 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 219 flow. Second operand 5 states and 93 transitions. [2024-06-04 15:15:45,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 61 transitions, 377 flow [2024-06-04 15:15:45,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 338 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-04 15:15:45,364 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 226 flow [2024-06-04 15:15:45,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=226, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-06-04 15:15:45,365 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 11 predicate places. [2024-06-04 15:15:45,365 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 226 flow [2024-06-04 15:15:45,365 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) [2024-06-04 15:15:45,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:45,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:45,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 15:15:45,366 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:15:45,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:45,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1288627549, now seen corresponding path program 1 times [2024-06-04 15:15:45,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:45,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468642418] [2024-06-04 15:15:45,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:45,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:45,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:46,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:46,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468642418] [2024-06-04 15:15:46,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468642418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:46,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:46,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:15:46,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593191958] [2024-06-04 15:15:46,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:46,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:15:46,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:46,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:15:46,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:15:46,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:15:46,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 226 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:46,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:46,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:15:46,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:46,626 INFO L124 PetriNetUnfolderBase]: 1883/2868 cut-off events. [2024-06-04 15:15:46,626 INFO L125 PetriNetUnfolderBase]: For 6041/6041 co-relation queries the response was YES. [2024-06-04 15:15:46,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8978 conditions, 2868 events. 1883/2868 cut-off events. For 6041/6041 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13583 event pairs, 763 based on Foata normal form. 6/2874 useless extension candidates. Maximal degree in co-relation 8956. Up to 2725 conditions per place. [2024-06-04 15:15:46,649 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 59 selfloop transitions, 17 changer transitions 0/80 dead transitions. [2024-06-04 15:15:46,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 80 transitions, 498 flow [2024-06-04 15:15:46,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:15:46,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:15:46,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-04 15:15:46,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-04 15:15:46,651 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 226 flow. Second operand 6 states and 117 transitions. [2024-06-04 15:15:46,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 80 transitions, 498 flow [2024-06-04 15:15:46,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 80 transitions, 476 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-04 15:15:46,655 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 329 flow [2024-06-04 15:15:46,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=329, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2024-06-04 15:15:46,658 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-04 15:15:46,658 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 329 flow [2024-06-04 15:15:46,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:46,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:46,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:46,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 15:15:46,659 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:15:46,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:46,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1836004428, now seen corresponding path program 1 times [2024-06-04 15:15:46,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:46,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939141581] [2024-06-04 15:15:46,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:46,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:46,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:47,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:47,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:47,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939141581] [2024-06-04 15:15:47,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939141581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:47,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:47,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:15:47,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393577592] [2024-06-04 15:15:47,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:47,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:15:47,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:47,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:15:47,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:15:47,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:15:47,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 329 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:47,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:47,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:15:47,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:47,831 INFO L124 PetriNetUnfolderBase]: 1894/2919 cut-off events. [2024-06-04 15:15:47,831 INFO L125 PetriNetUnfolderBase]: For 9071/9075 co-relation queries the response was YES. [2024-06-04 15:15:47,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10164 conditions, 2919 events. 1894/2919 cut-off events. For 9071/9075 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14036 event pairs, 771 based on Foata normal form. 6/2924 useless extension candidates. Maximal degree in co-relation 10139. Up to 2754 conditions per place. [2024-06-04 15:15:47,845 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 67 selfloop transitions, 16 changer transitions 0/87 dead transitions. [2024-06-04 15:15:47,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 87 transitions, 617 flow [2024-06-04 15:15:47,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:15:47,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:15:47,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-04 15:15:47,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-04 15:15:47,847 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 329 flow. Second operand 6 states and 116 transitions. [2024-06-04 15:15:47,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 87 transitions, 617 flow [2024-06-04 15:15:47,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 87 transitions, 601 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-04 15:15:47,853 INFO L231 Difference]: Finished difference. Result has 65 places, 67 transitions, 407 flow [2024-06-04 15:15:47,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=407, PETRI_PLACES=65, PETRI_TRANSITIONS=67} [2024-06-04 15:15:47,855 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-04 15:15:47,855 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 67 transitions, 407 flow [2024-06-04 15:15:47,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:47,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:47,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:47,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 15:15:47,856 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:15:47,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:47,856 INFO L85 PathProgramCache]: Analyzing trace with hash -376681642, now seen corresponding path program 2 times [2024-06-04 15:15:47,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:47,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032753833] [2024-06-04 15:15:47,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:47,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:47,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:48,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:48,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:48,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032753833] [2024-06-04 15:15:48,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032753833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:48,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:48,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:15:48,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045525893] [2024-06-04 15:15:48,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:48,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:15:48,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:48,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:15:48,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:15:48,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:15:48,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 67 transitions, 407 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:48,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:48,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:15:48,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:48,938 INFO L124 PetriNetUnfolderBase]: 1889/2911 cut-off events. [2024-06-04 15:15:48,939 INFO L125 PetriNetUnfolderBase]: For 11512/11512 co-relation queries the response was YES. [2024-06-04 15:15:48,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10764 conditions, 2911 events. 1889/2911 cut-off events. For 11512/11512 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13968 event pairs, 767 based on Foata normal form. 2/2912 useless extension candidates. Maximal degree in co-relation 10736. Up to 2773 conditions per place. [2024-06-04 15:15:48,955 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 67 selfloop transitions, 11 changer transitions 0/82 dead transitions. [2024-06-04 15:15:48,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 82 transitions, 601 flow [2024-06-04 15:15:48,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:15:48,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:15:48,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-04 15:15:48,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42248062015503873 [2024-06-04 15:15:48,958 INFO L175 Difference]: Start difference. First operand has 65 places, 67 transitions, 407 flow. Second operand 6 states and 109 transitions. [2024-06-04 15:15:48,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 82 transitions, 601 flow [2024-06-04 15:15:48,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 82 transitions, 559 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-04 15:15:48,969 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 395 flow [2024-06-04 15:15:48,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=395, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2024-06-04 15:15:48,971 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2024-06-04 15:15:48,971 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 395 flow [2024-06-04 15:15:48,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:48,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:48,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:48,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 15:15:48,972 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:15:48,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:48,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1597946296, now seen corresponding path program 1 times [2024-06-04 15:15:48,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:48,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358193788] [2024-06-04 15:15:48,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:48,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:49,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:49,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358193788] [2024-06-04 15:15:49,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358193788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:49,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:49,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:15:49,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967687902] [2024-06-04 15:15:49,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:49,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:15:49,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:49,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:15:49,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:15:49,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:15:49,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 395 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:49,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:49,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:15:49,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:50,345 INFO L124 PetriNetUnfolderBase]: 1900/2927 cut-off events. [2024-06-04 15:15:50,345 INFO L125 PetriNetUnfolderBase]: For 13299/13299 co-relation queries the response was YES. [2024-06-04 15:15:50,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10970 conditions, 2927 events. 1900/2927 cut-off events. For 13299/13299 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14059 event pairs, 746 based on Foata normal form. 2/2928 useless extension candidates. Maximal degree in co-relation 10940. Up to 2768 conditions per place. [2024-06-04 15:15:50,361 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 77 selfloop transitions, 14 changer transitions 0/95 dead transitions. [2024-06-04 15:15:50,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 95 transitions, 669 flow [2024-06-04 15:15:50,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:15:50,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:15:50,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-04 15:15:50,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-04 15:15:50,363 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 395 flow. Second operand 7 states and 131 transitions. [2024-06-04 15:15:50,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 95 transitions, 669 flow [2024-06-04 15:15:50,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 95 transitions, 635 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 15:15:50,370 INFO L231 Difference]: Finished difference. Result has 70 places, 70 transitions, 431 flow [2024-06-04 15:15:50,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=431, PETRI_PLACES=70, PETRI_TRANSITIONS=70} [2024-06-04 15:15:50,371 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 26 predicate places. [2024-06-04 15:15:50,371 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 70 transitions, 431 flow [2024-06-04 15:15:50,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:50,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:50,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:50,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 15:15:50,372 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:15:50,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:50,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1597826140, now seen corresponding path program 1 times [2024-06-04 15:15:50,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:50,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835033818] [2024-06-04 15:15:50,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:50,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:50,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:51,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:51,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835033818] [2024-06-04 15:15:51,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835033818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:51,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:51,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:15:51,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587408771] [2024-06-04 15:15:51,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:51,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:15:51,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:51,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:15:51,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:15:51,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:15:51,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 431 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:51,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:51,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:15:51,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:51,677 INFO L124 PetriNetUnfolderBase]: 1984/3045 cut-off events. [2024-06-04 15:15:51,677 INFO L125 PetriNetUnfolderBase]: For 16924/16924 co-relation queries the response was YES. [2024-06-04 15:15:51,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12031 conditions, 3045 events. 1984/3045 cut-off events. For 16924/16924 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14610 event pairs, 682 based on Foata normal form. 6/3051 useless extension candidates. Maximal degree in co-relation 12001. Up to 2747 conditions per place. [2024-06-04 15:15:51,696 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 87 selfloop transitions, 28 changer transitions 0/119 dead transitions. [2024-06-04 15:15:51,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 119 transitions, 939 flow [2024-06-04 15:15:51,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:15:51,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:15:51,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-04 15:15:51,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47840531561461797 [2024-06-04 15:15:51,698 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 431 flow. Second operand 7 states and 144 transitions. [2024-06-04 15:15:51,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 119 transitions, 939 flow [2024-06-04 15:15:51,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 119 transitions, 893 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-04 15:15:51,708 INFO L231 Difference]: Finished difference. Result has 75 places, 87 transitions, 606 flow [2024-06-04 15:15:51,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=606, PETRI_PLACES=75, PETRI_TRANSITIONS=87} [2024-06-04 15:15:51,709 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2024-06-04 15:15:51,709 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 87 transitions, 606 flow [2024-06-04 15:15:51,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:51,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:51,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:51,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 15:15:51,710 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:15:51,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:51,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1597826326, now seen corresponding path program 2 times [2024-06-04 15:15:51,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:51,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015794534] [2024-06-04 15:15:51,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:51,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:51,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:52,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:52,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:52,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015794534] [2024-06-04 15:15:52,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015794534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:52,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:52,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:15:52,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507839645] [2024-06-04 15:15:52,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:52,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:15:52,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:52,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:15:52,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:15:52,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:15:52,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 87 transitions, 606 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:52,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:52,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:15:52,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:52,943 INFO L124 PetriNetUnfolderBase]: 1995/3063 cut-off events. [2024-06-04 15:15:52,943 INFO L125 PetriNetUnfolderBase]: For 21859/21863 co-relation queries the response was YES. [2024-06-04 15:15:52,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13523 conditions, 3063 events. 1995/3063 cut-off events. For 21859/21863 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14656 event pairs, 719 based on Foata normal form. 6/3068 useless extension candidates. Maximal degree in co-relation 13489. Up to 2856 conditions per place. [2024-06-04 15:15:52,959 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 87 selfloop transitions, 26 changer transitions 0/117 dead transitions. [2024-06-04 15:15:52,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 117 transitions, 1008 flow [2024-06-04 15:15:52,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:15:52,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:15:52,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-04 15:15:52,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-04 15:15:52,960 INFO L175 Difference]: Start difference. First operand has 75 places, 87 transitions, 606 flow. Second operand 7 states and 134 transitions. [2024-06-04 15:15:52,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 117 transitions, 1008 flow [2024-06-04 15:15:52,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 117 transitions, 972 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-04 15:15:52,973 INFO L231 Difference]: Finished difference. Result has 81 places, 93 transitions, 712 flow [2024-06-04 15:15:52,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=712, PETRI_PLACES=81, PETRI_TRANSITIONS=93} [2024-06-04 15:15:52,974 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2024-06-04 15:15:52,974 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 93 transitions, 712 flow [2024-06-04 15:15:52,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:52,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:52,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:52,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 15:15:52,975 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:15:52,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:52,975 INFO L85 PathProgramCache]: Analyzing trace with hash -160839662, now seen corresponding path program 2 times [2024-06-04 15:15:52,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:52,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906218161] [2024-06-04 15:15:52,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:52,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:52,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:53,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:53,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:53,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906218161] [2024-06-04 15:15:53,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906218161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:53,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:53,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:15:53,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500812349] [2024-06-04 15:15:53,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:53,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:15:53,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:53,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:15:53,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:15:53,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:15:53,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 93 transitions, 712 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:53,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:53,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:15:53,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:54,227 INFO L124 PetriNetUnfolderBase]: 2031/3112 cut-off events. [2024-06-04 15:15:54,228 INFO L125 PetriNetUnfolderBase]: For 26534/26534 co-relation queries the response was YES. [2024-06-04 15:15:54,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14383 conditions, 3112 events. 2031/3112 cut-off events. For 26534/26534 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14879 event pairs, 702 based on Foata normal form. 6/3118 useless extension candidates. Maximal degree in co-relation 14346. Up to 2931 conditions per place. [2024-06-04 15:15:54,246 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 96 selfloop transitions, 21 changer transitions 0/121 dead transitions. [2024-06-04 15:15:54,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 121 transitions, 1096 flow [2024-06-04 15:15:54,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:15:54,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:15:54,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-04 15:15:54,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-04 15:15:54,248 INFO L175 Difference]: Start difference. First operand has 81 places, 93 transitions, 712 flow. Second operand 7 states and 133 transitions. [2024-06-04 15:15:54,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 121 transitions, 1096 flow [2024-06-04 15:15:54,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 121 transitions, 1044 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-04 15:15:54,267 INFO L231 Difference]: Finished difference. Result has 86 places, 99 transitions, 777 flow [2024-06-04 15:15:54,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=777, PETRI_PLACES=86, PETRI_TRANSITIONS=99} [2024-06-04 15:15:54,267 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 42 predicate places. [2024-06-04 15:15:54,268 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 99 transitions, 777 flow [2024-06-04 15:15:54,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:54,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:54,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:54,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 15:15:54,268 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:15:54,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:54,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1420694806, now seen corresponding path program 3 times [2024-06-04 15:15:54,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:54,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800616861] [2024-06-04 15:15:54,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:54,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:54,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:54,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800616861] [2024-06-04 15:15:54,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800616861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:54,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:54,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:15:54,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062066685] [2024-06-04 15:15:54,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:54,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:15:54,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:54,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:15:54,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:15:55,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:15:55,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 99 transitions, 777 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:55,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:55,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:15:55,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:55,494 INFO L124 PetriNetUnfolderBase]: 2026/3120 cut-off events. [2024-06-04 15:15:55,494 INFO L125 PetriNetUnfolderBase]: For 30390/30390 co-relation queries the response was YES. [2024-06-04 15:15:55,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14824 conditions, 3120 events. 2026/3120 cut-off events. For 30390/30390 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 15083 event pairs, 1020 based on Foata normal form. 2/3121 useless extension candidates. Maximal degree in co-relation 14784. Up to 2960 conditions per place. [2024-06-04 15:15:55,512 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 99 selfloop transitions, 16 changer transitions 0/119 dead transitions. [2024-06-04 15:15:55,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 119 transitions, 1071 flow [2024-06-04 15:15:55,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:15:55,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:15:55,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-04 15:15:55,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-04 15:15:55,514 INFO L175 Difference]: Start difference. First operand has 86 places, 99 transitions, 777 flow. Second operand 8 states and 135 transitions. [2024-06-04 15:15:55,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 119 transitions, 1071 flow [2024-06-04 15:15:55,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 119 transitions, 993 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-04 15:15:55,534 INFO L231 Difference]: Finished difference. Result has 91 places, 101 transitions, 762 flow [2024-06-04 15:15:55,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=762, PETRI_PLACES=91, PETRI_TRANSITIONS=101} [2024-06-04 15:15:55,535 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-06-04 15:15:55,535 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 101 transitions, 762 flow [2024-06-04 15:15:55,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:55,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:55,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:55,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 15:15:55,535 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:15:55,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:55,536 INFO L85 PathProgramCache]: Analyzing trace with hash 293486564, now seen corresponding path program 3 times [2024-06-04 15:15:55,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:55,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835508912] [2024-06-04 15:15:55,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:55,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:55,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:56,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:56,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:56,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835508912] [2024-06-04 15:15:56,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835508912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:56,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:56,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:15:56,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898097755] [2024-06-04 15:15:56,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:56,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:15:56,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:56,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:15:56,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:15:56,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:15:56,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 101 transitions, 762 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:56,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:56,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:15:56,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:56,778 INFO L124 PetriNetUnfolderBase]: 2030/3124 cut-off events. [2024-06-04 15:15:56,778 INFO L125 PetriNetUnfolderBase]: For 33325/33325 co-relation queries the response was YES. [2024-06-04 15:15:56,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14971 conditions, 3124 events. 2030/3124 cut-off events. For 33325/33325 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15084 event pairs, 1012 based on Foata normal form. 6/3130 useless extension candidates. Maximal degree in co-relation 14930. Up to 2870 conditions per place. [2024-06-04 15:15:56,794 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 98 selfloop transitions, 29 changer transitions 0/131 dead transitions. [2024-06-04 15:15:56,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 131 transitions, 1231 flow [2024-06-04 15:15:56,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:15:56,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:15:56,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-04 15:15:56,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-04 15:15:56,795 INFO L175 Difference]: Start difference. First operand has 91 places, 101 transitions, 762 flow. Second operand 8 states and 146 transitions. [2024-06-04 15:15:56,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 131 transitions, 1231 flow [2024-06-04 15:15:56,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 131 transitions, 1184 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 15:15:56,817 INFO L231 Difference]: Finished difference. Result has 94 places, 108 transitions, 881 flow [2024-06-04 15:15:56,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=715, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=881, PETRI_PLACES=94, PETRI_TRANSITIONS=108} [2024-06-04 15:15:56,817 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 50 predicate places. [2024-06-04 15:15:56,818 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 108 transitions, 881 flow [2024-06-04 15:15:56,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:56,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:56,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:56,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 15:15:56,818 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:15:56,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:56,819 INFO L85 PathProgramCache]: Analyzing trace with hash 293732642, now seen corresponding path program 1 times [2024-06-04 15:15:56,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:56,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446290068] [2024-06-04 15:15:56,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:56,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:56,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:57,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:57,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446290068] [2024-06-04 15:15:57,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446290068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:57,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:57,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:15:57,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819382694] [2024-06-04 15:15:57,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:57,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:15:57,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:57,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:15:57,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:15:57,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:15:57,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 108 transitions, 881 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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) [2024-06-04 15:15:57,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:57,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:15:57,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:58,358 INFO L124 PetriNetUnfolderBase]: 2033/3128 cut-off events. [2024-06-04 15:15:58,358 INFO L125 PetriNetUnfolderBase]: For 38178/38178 co-relation queries the response was YES. [2024-06-04 15:15:58,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15574 conditions, 3128 events. 2033/3128 cut-off events. For 38178/38178 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15101 event pairs, 989 based on Foata normal form. 6/3134 useless extension candidates. Maximal degree in co-relation 15531. Up to 2915 conditions per place. [2024-06-04 15:15:58,374 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 102 selfloop transitions, 26 changer transitions 0/132 dead transitions. [2024-06-04 15:15:58,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 132 transitions, 1285 flow [2024-06-04 15:15:58,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:15:58,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:15:58,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-04 15:15:58,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-04 15:15:58,375 INFO L175 Difference]: Start difference. First operand has 94 places, 108 transitions, 881 flow. Second operand 7 states and 134 transitions. [2024-06-04 15:15:58,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 132 transitions, 1285 flow [2024-06-04 15:15:58,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 132 transitions, 1230 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-04 15:15:58,398 INFO L231 Difference]: Finished difference. Result has 97 places, 111 transitions, 932 flow [2024-06-04 15:15:58,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=932, PETRI_PLACES=97, PETRI_TRANSITIONS=111} [2024-06-04 15:15:58,398 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-06-04 15:15:58,398 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 111 transitions, 932 flow [2024-06-04 15:15:58,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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) [2024-06-04 15:15:58,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:58,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:58,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 15:15:58,399 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:15:58,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:58,399 INFO L85 PathProgramCache]: Analyzing trace with hash 2030543120, now seen corresponding path program 1 times [2024-06-04 15:15:58,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:58,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955746739] [2024-06-04 15:15:58,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:58,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:58,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:58,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:58,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:58,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955746739] [2024-06-04 15:15:58,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955746739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:58,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:58,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:15:58,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801905434] [2024-06-04 15:15:58,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:58,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:15:58,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:58,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:15:58,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:15:59,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:15:59,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 111 transitions, 932 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:59,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:59,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:15:59,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:59,471 INFO L124 PetriNetUnfolderBase]: 1897/2978 cut-off events. [2024-06-04 15:15:59,471 INFO L125 PetriNetUnfolderBase]: For 40980/40984 co-relation queries the response was YES. [2024-06-04 15:15:59,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15374 conditions, 2978 events. 1897/2978 cut-off events. For 40980/40984 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14826 event pairs, 1003 based on Foata normal form. 5/2981 useless extension candidates. Maximal degree in co-relation 15330. Up to 2769 conditions per place. [2024-06-04 15:15:59,487 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 95 selfloop transitions, 9 changer transitions 0/118 dead transitions. [2024-06-04 15:15:59,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 118 transitions, 1158 flow [2024-06-04 15:15:59,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:15:59,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:15:59,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-04 15:15:59,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-04 15:15:59,489 INFO L175 Difference]: Start difference. First operand has 97 places, 111 transitions, 932 flow. Second operand 5 states and 93 transitions. [2024-06-04 15:15:59,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 118 transitions, 1158 flow [2024-06-04 15:15:59,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 118 transitions, 1068 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-04 15:15:59,513 INFO L231 Difference]: Finished difference. Result has 97 places, 111 transitions, 866 flow [2024-06-04 15:15:59,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=842, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=866, PETRI_PLACES=97, PETRI_TRANSITIONS=111} [2024-06-04 15:15:59,513 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-06-04 15:15:59,513 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 111 transitions, 866 flow [2024-06-04 15:15:59,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:59,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:59,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:59,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 15:15:59,517 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:15:59,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:59,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1761917217, now seen corresponding path program 1 times [2024-06-04 15:15:59,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:59,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755608088] [2024-06-04 15:15:59,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:59,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:59,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:00,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:00,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:00,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755608088] [2024-06-04 15:16:00,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755608088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:00,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:00,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:16:00,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101251006] [2024-06-04 15:16:00,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:00,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:16:00,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:00,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:16:00,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:16:00,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:16:00,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 111 transitions, 866 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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) [2024-06-04 15:16:00,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:00,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:16:00,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:00,884 INFO L124 PetriNetUnfolderBase]: 2109/3234 cut-off events. [2024-06-04 15:16:00,884 INFO L125 PetriNetUnfolderBase]: For 44954/44958 co-relation queries the response was YES. [2024-06-04 15:16:00,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16742 conditions, 3234 events. 2109/3234 cut-off events. For 44954/44958 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15554 event pairs, 679 based on Foata normal form. 6/3240 useless extension candidates. Maximal degree in co-relation 16697. Up to 2992 conditions per place. [2024-06-04 15:16:00,900 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 129 selfloop transitions, 37 changer transitions 0/170 dead transitions. [2024-06-04 15:16:00,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 170 transitions, 1600 flow [2024-06-04 15:16:00,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:16:00,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:16:00,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-04 15:16:00,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-04 15:16:00,901 INFO L175 Difference]: Start difference. First operand has 97 places, 111 transitions, 866 flow. Second operand 10 states and 186 transitions. [2024-06-04 15:16:00,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 170 transitions, 1600 flow [2024-06-04 15:16:00,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 170 transitions, 1576 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-04 15:16:00,926 INFO L231 Difference]: Finished difference. Result has 105 places, 132 transitions, 1152 flow [2024-06-04 15:16:00,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=842, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1152, PETRI_PLACES=105, PETRI_TRANSITIONS=132} [2024-06-04 15:16:00,926 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 61 predicate places. [2024-06-04 15:16:00,926 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 132 transitions, 1152 flow [2024-06-04 15:16:00,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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) [2024-06-04 15:16:00,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:00,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:00,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 15:16:00,927 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:16:00,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:00,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1030142181, now seen corresponding path program 2 times [2024-06-04 15:16:00,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:00,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670246711] [2024-06-04 15:16:00,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:00,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:02,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:02,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:02,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670246711] [2024-06-04 15:16:02,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670246711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:02,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:02,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:16:02,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129116568] [2024-06-04 15:16:02,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:02,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:16:02,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:02,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:16:02,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:16:02,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:16:02,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 132 transitions, 1152 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:02,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:02,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:16:02,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:02,929 INFO L124 PetriNetUnfolderBase]: 2209/3390 cut-off events. [2024-06-04 15:16:02,929 INFO L125 PetriNetUnfolderBase]: For 53959/53963 co-relation queries the response was YES. [2024-06-04 15:16:02,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18456 conditions, 3390 events. 2209/3390 cut-off events. For 53959/53963 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 16484 event pairs, 856 based on Foata normal form. 7/3397 useless extension candidates. Maximal degree in co-relation 18408. Up to 3143 conditions per place. [2024-06-04 15:16:02,950 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 149 selfloop transitions, 48 changer transitions 0/201 dead transitions. [2024-06-04 15:16:02,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 201 transitions, 2025 flow [2024-06-04 15:16:02,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:16:02,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:16:02,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-04 15:16:02,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42093023255813955 [2024-06-04 15:16:02,952 INFO L175 Difference]: Start difference. First operand has 105 places, 132 transitions, 1152 flow. Second operand 10 states and 181 transitions. [2024-06-04 15:16:02,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 201 transitions, 2025 flow [2024-06-04 15:16:03,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 201 transitions, 1898 flow, removed 56 selfloop flow, removed 3 redundant places. [2024-06-04 15:16:03,028 INFO L231 Difference]: Finished difference. Result has 116 places, 167 transitions, 1595 flow [2024-06-04 15:16:03,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1595, PETRI_PLACES=116, PETRI_TRANSITIONS=167} [2024-06-04 15:16:03,029 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 72 predicate places. [2024-06-04 15:16:03,029 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 167 transitions, 1595 flow [2024-06-04 15:16:03,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:03,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:03,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:03,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 15:16:03,029 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:16:03,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:03,030 INFO L85 PathProgramCache]: Analyzing trace with hash -289321938, now seen corresponding path program 1 times [2024-06-04 15:16:03,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:03,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517138206] [2024-06-04 15:16:03,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:03,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:03,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:03,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517138206] [2024-06-04 15:16:03,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517138206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:03,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:03,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:16:03,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617216310] [2024-06-04 15:16:03,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:03,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:16:03,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:03,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:16:03,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:16:03,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:16:03,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 167 transitions, 1595 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:03,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:03,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:16:03,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:04,662 INFO L124 PetriNetUnfolderBase]: 2353/3586 cut-off events. [2024-06-04 15:16:04,662 INFO L125 PetriNetUnfolderBase]: For 62209/62211 co-relation queries the response was YES. [2024-06-04 15:16:04,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20252 conditions, 3586 events. 2353/3586 cut-off events. For 62209/62211 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17488 event pairs, 873 based on Foata normal form. 8/3590 useless extension candidates. Maximal degree in co-relation 20198. Up to 3222 conditions per place. [2024-06-04 15:16:04,685 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 184 selfloop transitions, 56 changer transitions 0/244 dead transitions. [2024-06-04 15:16:04,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 244 transitions, 2827 flow [2024-06-04 15:16:04,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:16:04,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:16:04,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-04 15:16:04,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-04 15:16:04,687 INFO L175 Difference]: Start difference. First operand has 116 places, 167 transitions, 1595 flow. Second operand 11 states and 215 transitions. [2024-06-04 15:16:04,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 244 transitions, 2827 flow [2024-06-04 15:16:04,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 244 transitions, 2710 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-04 15:16:04,735 INFO L231 Difference]: Finished difference. Result has 127 places, 195 transitions, 1912 flow [2024-06-04 15:16:04,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1478, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1912, PETRI_PLACES=127, PETRI_TRANSITIONS=195} [2024-06-04 15:16:04,736 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 83 predicate places. [2024-06-04 15:16:04,736 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 195 transitions, 1912 flow [2024-06-04 15:16:04,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:04,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:04,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:04,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 15:16:04,737 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:16:04,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:04,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1030051816, now seen corresponding path program 2 times [2024-06-04 15:16:04,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:04,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894381847] [2024-06-04 15:16:04,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:04,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:04,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:05,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:05,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:05,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894381847] [2024-06-04 15:16:05,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894381847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:05,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:05,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:16:05,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120788467] [2024-06-04 15:16:05,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:05,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:16:05,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:05,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:16:05,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:16:05,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:16:05,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 195 transitions, 1912 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:05,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:05,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:16:05,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:06,330 INFO L124 PetriNetUnfolderBase]: 2541/3852 cut-off events. [2024-06-04 15:16:06,330 INFO L125 PetriNetUnfolderBase]: For 75789/75791 co-relation queries the response was YES. [2024-06-04 15:16:06,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23514 conditions, 3852 events. 2541/3852 cut-off events. For 75789/75791 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 18837 event pairs, 867 based on Foata normal form. 12/3861 useless extension candidates. Maximal degree in co-relation 23456. Up to 3504 conditions per place. [2024-06-04 15:16:06,359 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 191 selfloop transitions, 72 changer transitions 0/267 dead transitions. [2024-06-04 15:16:06,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 267 transitions, 3185 flow [2024-06-04 15:16:06,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:16:06,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:16:06,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-04 15:16:06,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-04 15:16:06,368 INFO L175 Difference]: Start difference. First operand has 127 places, 195 transitions, 1912 flow. Second operand 9 states and 177 transitions. [2024-06-04 15:16:06,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 267 transitions, 3185 flow [2024-06-04 15:16:06,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 267 transitions, 2912 flow, removed 106 selfloop flow, removed 5 redundant places. [2024-06-04 15:16:06,444 INFO L231 Difference]: Finished difference. Result has 133 places, 230 transitions, 2334 flow [2024-06-04 15:16:06,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1754, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2334, PETRI_PLACES=133, PETRI_TRANSITIONS=230} [2024-06-04 15:16:06,445 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-04 15:16:06,445 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 230 transitions, 2334 flow [2024-06-04 15:16:06,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:06,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:06,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:06,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 15:16:06,445 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:16:06,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:06,446 INFO L85 PathProgramCache]: Analyzing trace with hash -139752741, now seen corresponding path program 3 times [2024-06-04 15:16:06,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:06,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305963089] [2024-06-04 15:16:06,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:06,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:06,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:07,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:07,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:07,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305963089] [2024-06-04 15:16:07,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305963089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:07,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:07,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:16:07,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549461693] [2024-06-04 15:16:07,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:07,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:16:07,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:07,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:16:07,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:16:07,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:16:07,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 230 transitions, 2334 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:07,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:07,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:16:07,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:08,280 INFO L124 PetriNetUnfolderBase]: 2602/3947 cut-off events. [2024-06-04 15:16:08,280 INFO L125 PetriNetUnfolderBase]: For 83069/83079 co-relation queries the response was YES. [2024-06-04 15:16:08,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24716 conditions, 3947 events. 2602/3947 cut-off events. For 83069/83079 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 19390 event pairs, 877 based on Foata normal form. 12/3956 useless extension candidates. Maximal degree in co-relation 24656. Up to 3634 conditions per place. [2024-06-04 15:16:08,307 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 202 selfloop transitions, 75 changer transitions 0/281 dead transitions. [2024-06-04 15:16:08,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 281 transitions, 3206 flow [2024-06-04 15:16:08,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:16:08,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:16:08,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-04 15:16:08,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-04 15:16:08,308 INFO L175 Difference]: Start difference. First operand has 133 places, 230 transitions, 2334 flow. Second operand 9 states and 167 transitions. [2024-06-04 15:16:08,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 281 transitions, 3206 flow [2024-06-04 15:16:08,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 281 transitions, 3121 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-04 15:16:08,381 INFO L231 Difference]: Finished difference. Result has 142 places, 251 transitions, 2646 flow [2024-06-04 15:16:08,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2249, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2646, PETRI_PLACES=142, PETRI_TRANSITIONS=251} [2024-06-04 15:16:08,382 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-04 15:16:08,382 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 251 transitions, 2646 flow [2024-06-04 15:16:08,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:08,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:08,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:08,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 15:16:08,382 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:16:08,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:08,382 INFO L85 PathProgramCache]: Analyzing trace with hash -139752586, now seen corresponding path program 3 times [2024-06-04 15:16:08,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:08,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142012498] [2024-06-04 15:16:08,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:08,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:08,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:09,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:09,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142012498] [2024-06-04 15:16:09,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142012498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:09,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:09,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:16:09,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987355296] [2024-06-04 15:16:09,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:09,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:16:09,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:09,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:16:09,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:16:09,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:16:09,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 251 transitions, 2646 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:09,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:09,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:16:09,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:10,067 INFO L124 PetriNetUnfolderBase]: 2916/4389 cut-off events. [2024-06-04 15:16:10,067 INFO L125 PetriNetUnfolderBase]: For 100503/100509 co-relation queries the response was YES. [2024-06-04 15:16:10,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28348 conditions, 4389 events. 2916/4389 cut-off events. For 100503/100509 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 21876 event pairs, 884 based on Foata normal form. 12/4399 useless extension candidates. Maximal degree in co-relation 28284. Up to 3382 conditions per place. [2024-06-04 15:16:10,102 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 226 selfloop transitions, 124 changer transitions 0/354 dead transitions. [2024-06-04 15:16:10,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 354 transitions, 4461 flow [2024-06-04 15:16:10,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:16:10,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:16:10,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-04 15:16:10,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-04 15:16:10,103 INFO L175 Difference]: Start difference. First operand has 142 places, 251 transitions, 2646 flow. Second operand 9 states and 189 transitions. [2024-06-04 15:16:10,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 354 transitions, 4461 flow [2024-06-04 15:16:10,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 354 transitions, 4325 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-04 15:16:10,187 INFO L231 Difference]: Finished difference. Result has 152 places, 288 transitions, 3279 flow [2024-06-04 15:16:10,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2510, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3279, PETRI_PLACES=152, PETRI_TRANSITIONS=288} [2024-06-04 15:16:10,187 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-04 15:16:10,187 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 288 transitions, 3279 flow [2024-06-04 15:16:10,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:10,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:10,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:10,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 15:16:10,188 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:16:10,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:10,188 INFO L85 PathProgramCache]: Analyzing trace with hash -139747006, now seen corresponding path program 4 times [2024-06-04 15:16:10,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:10,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385049026] [2024-06-04 15:16:10,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:10,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:10,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:10,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:10,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:10,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385049026] [2024-06-04 15:16:10,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385049026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:10,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:10,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:16:10,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362726558] [2024-06-04 15:16:10,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:10,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:16:10,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:10,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:16:10,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:16:10,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:16:10,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 288 transitions, 3279 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:10,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:10,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:16:10,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:11,863 INFO L124 PetriNetUnfolderBase]: 2920/4395 cut-off events. [2024-06-04 15:16:11,863 INFO L125 PetriNetUnfolderBase]: For 113423/113429 co-relation queries the response was YES. [2024-06-04 15:16:11,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30687 conditions, 4395 events. 2920/4395 cut-off events. For 113423/113429 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 21904 event pairs, 865 based on Foata normal form. 12/4405 useless extension candidates. Maximal degree in co-relation 30618. Up to 3391 conditions per place. [2024-06-04 15:16:11,900 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 213 selfloop transitions, 139 changer transitions 0/356 dead transitions. [2024-06-04 15:16:11,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 356 transitions, 4772 flow [2024-06-04 15:16:11,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:16:11,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:16:11,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-04 15:16:11,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48320413436692505 [2024-06-04 15:16:11,901 INFO L175 Difference]: Start difference. First operand has 152 places, 288 transitions, 3279 flow. Second operand 9 states and 187 transitions. [2024-06-04 15:16:11,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 356 transitions, 4772 flow [2024-06-04 15:16:12,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 356 transitions, 4632 flow, removed 63 selfloop flow, removed 2 redundant places. [2024-06-04 15:16:12,073 INFO L231 Difference]: Finished difference. Result has 161 places, 294 transitions, 3616 flow [2024-06-04 15:16:12,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3159, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3616, PETRI_PLACES=161, PETRI_TRANSITIONS=294} [2024-06-04 15:16:12,073 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 117 predicate places. [2024-06-04 15:16:12,073 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 294 transitions, 3616 flow [2024-06-04 15:16:12,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:12,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:12,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:12,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 15:16:12,074 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:16:12,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:12,074 INFO L85 PathProgramCache]: Analyzing trace with hash 2003183379, now seen corresponding path program 4 times [2024-06-04 15:16:12,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:12,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917681654] [2024-06-04 15:16:12,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:12,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:12,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:12,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:12,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:12,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917681654] [2024-06-04 15:16:12,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917681654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:12,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:12,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:16:12,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051063647] [2024-06-04 15:16:12,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:12,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:16:12,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:12,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:16:12,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:16:13,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:16:13,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 294 transitions, 3616 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:13,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:13,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:16:13,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:13,951 INFO L124 PetriNetUnfolderBase]: 2912/4388 cut-off events. [2024-06-04 15:16:13,951 INFO L125 PetriNetUnfolderBase]: For 120059/120061 co-relation queries the response was YES. [2024-06-04 15:16:13,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31386 conditions, 4388 events. 2912/4388 cut-off events. For 120059/120061 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 21873 event pairs, 970 based on Foata normal form. 5/4390 useless extension candidates. Maximal degree in co-relation 31313. Up to 4056 conditions per place. [2024-06-04 15:16:13,987 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 250 selfloop transitions, 72 changer transitions 0/326 dead transitions. [2024-06-04 15:16:13,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 326 transitions, 4416 flow [2024-06-04 15:16:13,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:16:13,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:16:13,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-04 15:16:13,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-04 15:16:13,990 INFO L175 Difference]: Start difference. First operand has 161 places, 294 transitions, 3616 flow. Second operand 9 states and 166 transitions. [2024-06-04 15:16:13,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 326 transitions, 4416 flow [2024-06-04 15:16:14,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 326 transitions, 4136 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-04 15:16:14,106 INFO L231 Difference]: Finished difference. Result has 165 places, 294 transitions, 3512 flow [2024-06-04 15:16:14,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3336, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3512, PETRI_PLACES=165, PETRI_TRANSITIONS=294} [2024-06-04 15:16:14,106 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 121 predicate places. [2024-06-04 15:16:14,106 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 294 transitions, 3512 flow [2024-06-04 15:16:14,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:14,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:14,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:14,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 15:16:14,107 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:16:14,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:14,107 INFO L85 PathProgramCache]: Analyzing trace with hash 2003273744, now seen corresponding path program 5 times [2024-06-04 15:16:14,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:14,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012033004] [2024-06-04 15:16:14,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:14,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:14,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:14,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:14,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012033004] [2024-06-04 15:16:14,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012033004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:14,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:14,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:16:14,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307690176] [2024-06-04 15:16:14,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:14,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:16:14,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:14,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:16:14,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:16:14,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:16:14,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 294 transitions, 3512 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:14,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:14,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:16:14,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:15,896 INFO L124 PetriNetUnfolderBase]: 3111/4678 cut-off events. [2024-06-04 15:16:15,896 INFO L125 PetriNetUnfolderBase]: For 131282/131282 co-relation queries the response was YES. [2024-06-04 15:16:15,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33508 conditions, 4678 events. 3111/4678 cut-off events. For 131282/131282 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 23546 event pairs, 1110 based on Foata normal form. 10/4685 useless extension candidates. Maximal degree in co-relation 33434. Up to 4296 conditions per place. [2024-06-04 15:16:15,934 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 298 selfloop transitions, 80 changer transitions 0/382 dead transitions. [2024-06-04 15:16:15,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 382 transitions, 5510 flow [2024-06-04 15:16:15,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:16:15,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:16:15,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-04 15:16:15,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-04 15:16:15,935 INFO L175 Difference]: Start difference. First operand has 165 places, 294 transitions, 3512 flow. Second operand 9 states and 164 transitions. [2024-06-04 15:16:15,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 382 transitions, 5510 flow [2024-06-04 15:16:16,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 382 transitions, 5324 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-04 15:16:16,044 INFO L231 Difference]: Finished difference. Result has 170 places, 348 transitions, 4599 flow [2024-06-04 15:16:16,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3364, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4599, PETRI_PLACES=170, PETRI_TRANSITIONS=348} [2024-06-04 15:16:16,045 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 126 predicate places. [2024-06-04 15:16:16,045 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 348 transitions, 4599 flow [2024-06-04 15:16:16,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:16,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:16,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:16,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 15:16:16,046 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:16:16,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:16,046 INFO L85 PathProgramCache]: Analyzing trace with hash 2006992659, now seen corresponding path program 5 times [2024-06-04 15:16:16,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:16,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156782783] [2024-06-04 15:16:16,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:16,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:16,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:16,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:16,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:16,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156782783] [2024-06-04 15:16:16,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156782783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:16,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:16,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:16:16,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681809631] [2024-06-04 15:16:16,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:16,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:16:16,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:16,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:16:16,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:16:16,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:16:16,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 348 transitions, 4599 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:16,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:16,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:16:16,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:17,843 INFO L124 PetriNetUnfolderBase]: 3122/4691 cut-off events. [2024-06-04 15:16:17,843 INFO L125 PetriNetUnfolderBase]: For 134488/134498 co-relation queries the response was YES. [2024-06-04 15:16:17,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34789 conditions, 4691 events. 3122/4691 cut-off events. For 134488/134498 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 23584 event pairs, 936 based on Foata normal form. 12/4700 useless extension candidates. Maximal degree in co-relation 34711. Up to 4335 conditions per place. [2024-06-04 15:16:17,888 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 288 selfloop transitions, 85 changer transitions 0/377 dead transitions. [2024-06-04 15:16:17,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 377 transitions, 5579 flow [2024-06-04 15:16:17,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:16:17,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:16:17,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-04 15:16:17,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-04 15:16:17,889 INFO L175 Difference]: Start difference. First operand has 170 places, 348 transitions, 4599 flow. Second operand 8 states and 148 transitions. [2024-06-04 15:16:17,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 377 transitions, 5579 flow [2024-06-04 15:16:18,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 377 transitions, 5484 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-04 15:16:18,049 INFO L231 Difference]: Finished difference. Result has 175 places, 351 transitions, 4771 flow [2024-06-04 15:16:18,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4504, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4771, PETRI_PLACES=175, PETRI_TRANSITIONS=351} [2024-06-04 15:16:18,050 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 131 predicate places. [2024-06-04 15:16:18,050 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 351 transitions, 4771 flow [2024-06-04 15:16:18,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:18,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:18,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:18,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 15:16:18,050 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:16:18,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:18,051 INFO L85 PathProgramCache]: Analyzing trace with hash 2006992814, now seen corresponding path program 6 times [2024-06-04 15:16:18,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:18,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324158181] [2024-06-04 15:16:18,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:18,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:18,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:18,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:18,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324158181] [2024-06-04 15:16:18,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324158181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:18,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:18,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:16:18,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374411790] [2024-06-04 15:16:18,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:18,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:16:18,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:18,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:16:18,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:16:18,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:16:18,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 351 transitions, 4771 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:18,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:18,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:16:18,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:19,756 INFO L124 PetriNetUnfolderBase]: 3456/5167 cut-off events. [2024-06-04 15:16:19,756 INFO L125 PetriNetUnfolderBase]: For 159383/159385 co-relation queries the response was YES. [2024-06-04 15:16:19,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39341 conditions, 5167 events. 3456/5167 cut-off events. For 159383/159385 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 26330 event pairs, 1151 based on Foata normal form. 12/5176 useless extension candidates. Maximal degree in co-relation 39261. Up to 4082 conditions per place. [2024-06-04 15:16:19,808 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 294 selfloop transitions, 150 changer transitions 0/448 dead transitions. [2024-06-04 15:16:19,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 448 transitions, 7021 flow [2024-06-04 15:16:19,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:16:19,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:16:19,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-04 15:16:19,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-04 15:16:19,813 INFO L175 Difference]: Start difference. First operand has 175 places, 351 transitions, 4771 flow. Second operand 9 states and 175 transitions. [2024-06-04 15:16:19,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 448 transitions, 7021 flow [2024-06-04 15:16:19,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 448 transitions, 6773 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-04 15:16:20,004 INFO L231 Difference]: Finished difference. Result has 180 places, 392 transitions, 5549 flow [2024-06-04 15:16:20,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4544, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5549, PETRI_PLACES=180, PETRI_TRANSITIONS=392} [2024-06-04 15:16:20,005 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 136 predicate places. [2024-06-04 15:16:20,005 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 392 transitions, 5549 flow [2024-06-04 15:16:20,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:20,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:20,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:20,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 15:16:20,005 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:16:20,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:20,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1332441652, now seen corresponding path program 7 times [2024-06-04 15:16:20,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:20,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957645026] [2024-06-04 15:16:20,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:20,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:20,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:20,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:20,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:20,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957645026] [2024-06-04 15:16:20,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957645026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:20,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:20,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:16:20,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342622341] [2024-06-04 15:16:20,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:20,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:16:20,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:20,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:16:20,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:16:20,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:16:20,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 392 transitions, 5549 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:20,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:20,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:16:20,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:21,819 INFO L124 PetriNetUnfolderBase]: 3468/5187 cut-off events. [2024-06-04 15:16:21,819 INFO L125 PetriNetUnfolderBase]: For 174695/174697 co-relation queries the response was YES. [2024-06-04 15:16:21,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41404 conditions, 5187 events. 3468/5187 cut-off events. For 174695/174697 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 26468 event pairs, 1131 based on Foata normal form. 12/5196 useless extension candidates. Maximal degree in co-relation 41321. Up to 4103 conditions per place. [2024-06-04 15:16:21,865 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 276 selfloop transitions, 173 changer transitions 0/453 dead transitions. [2024-06-04 15:16:21,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 453 transitions, 7262 flow [2024-06-04 15:16:21,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:16:21,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:16:21,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-04 15:16:21,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-04 15:16:21,866 INFO L175 Difference]: Start difference. First operand has 180 places, 392 transitions, 5549 flow. Second operand 9 states and 173 transitions. [2024-06-04 15:16:21,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 453 transitions, 7262 flow [2024-06-04 15:16:22,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 453 transitions, 7022 flow, removed 112 selfloop flow, removed 3 redundant places. [2024-06-04 15:16:22,044 INFO L231 Difference]: Finished difference. Result has 188 places, 405 transitions, 6046 flow [2024-06-04 15:16:22,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5355, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6046, PETRI_PLACES=188, PETRI_TRANSITIONS=405} [2024-06-04 15:16:22,045 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 144 predicate places. [2024-06-04 15:16:22,045 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 405 transitions, 6046 flow [2024-06-04 15:16:22,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:22,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:22,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:22,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 15:16:22,046 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:16:22,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:22,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1206409858, now seen corresponding path program 8 times [2024-06-04 15:16:22,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:22,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453126516] [2024-06-04 15:16:22,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:22,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:22,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:22,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:22,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:22,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453126516] [2024-06-04 15:16:22,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453126516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:22,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:22,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:16:22,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046035559] [2024-06-04 15:16:22,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:22,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:16:22,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:22,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:16:22,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:16:22,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:16:22,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 405 transitions, 6046 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:22,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:22,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:16:22,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:23,834 INFO L124 PetriNetUnfolderBase]: 3518/5258 cut-off events. [2024-06-04 15:16:23,835 INFO L125 PetriNetUnfolderBase]: For 185845/185845 co-relation queries the response was YES. [2024-06-04 15:16:23,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43058 conditions, 5258 events. 3518/5258 cut-off events. For 185845/185845 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 26895 event pairs, 1229 based on Foata normal form. 8/5263 useless extension candidates. Maximal degree in co-relation 42971. Up to 4991 conditions per place. [2024-06-04 15:16:23,885 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 405 selfloop transitions, 33 changer transitions 0/442 dead transitions. [2024-06-04 15:16:23,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 442 transitions, 7322 flow [2024-06-04 15:16:23,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:16:23,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:16:23,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-04 15:16:23,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-04 15:16:23,887 INFO L175 Difference]: Start difference. First operand has 188 places, 405 transitions, 6046 flow. Second operand 9 states and 160 transitions. [2024-06-04 15:16:23,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 442 transitions, 7322 flow [2024-06-04 15:16:24,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 442 transitions, 7048 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-04 15:16:24,113 INFO L231 Difference]: Finished difference. Result has 192 places, 413 transitions, 6033 flow [2024-06-04 15:16:24,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5786, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6033, PETRI_PLACES=192, PETRI_TRANSITIONS=413} [2024-06-04 15:16:24,113 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 148 predicate places. [2024-06-04 15:16:24,113 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 413 transitions, 6033 flow [2024-06-04 15:16:24,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:24,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:24,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:24,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 15:16:24,114 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:16:24,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:24,115 INFO L85 PathProgramCache]: Analyzing trace with hash 975446935, now seen corresponding path program 1 times [2024-06-04 15:16:24,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:24,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434426706] [2024-06-04 15:16:24,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:24,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:24,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:24,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434426706] [2024-06-04 15:16:24,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434426706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:24,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:24,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:16:24,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623793635] [2024-06-04 15:16:24,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:24,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:16:24,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:24,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:16:24,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:16:25,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:16:25,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 413 transitions, 6033 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:25,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:25,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:16:25,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:26,063 INFO L124 PetriNetUnfolderBase]: 3520/5267 cut-off events. [2024-06-04 15:16:26,063 INFO L125 PetriNetUnfolderBase]: For 190133/190133 co-relation queries the response was YES. [2024-06-04 15:16:26,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42649 conditions, 5267 events. 3520/5267 cut-off events. For 190133/190133 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 26997 event pairs, 1220 based on Foata normal form. 3/5270 useless extension candidates. Maximal degree in co-relation 42561. Up to 5008 conditions per place. [2024-06-04 15:16:26,116 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 402 selfloop transitions, 33 changer transitions 0/439 dead transitions. [2024-06-04 15:16:26,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 439 transitions, 7168 flow [2024-06-04 15:16:26,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:16:26,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:16:26,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-04 15:16:26,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-04 15:16:26,117 INFO L175 Difference]: Start difference. First operand has 192 places, 413 transitions, 6033 flow. Second operand 7 states and 134 transitions. [2024-06-04 15:16:26,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 439 transitions, 7168 flow [2024-06-04 15:16:26,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 439 transitions, 7003 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-04 15:16:26,324 INFO L231 Difference]: Finished difference. Result has 192 places, 417 transitions, 6040 flow [2024-06-04 15:16:26,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5868, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6040, PETRI_PLACES=192, PETRI_TRANSITIONS=417} [2024-06-04 15:16:26,324 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 148 predicate places. [2024-06-04 15:16:26,324 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 417 transitions, 6040 flow [2024-06-04 15:16:26,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:26,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:26,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:26,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 15:16:26,325 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:16:26,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:26,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1091859078, now seen corresponding path program 9 times [2024-06-04 15:16:26,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:26,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910260300] [2024-06-04 15:16:26,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:26,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:26,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:27,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:27,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:27,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910260300] [2024-06-04 15:16:27,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910260300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:27,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:27,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:16:27,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240527410] [2024-06-04 15:16:27,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:27,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:16:27,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:27,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:16:27,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:16:27,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:16:27,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 417 transitions, 6040 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:27,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:27,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:16:27,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:28,177 INFO L124 PetriNetUnfolderBase]: 3616/5403 cut-off events. [2024-06-04 15:16:28,177 INFO L125 PetriNetUnfolderBase]: For 206586/206586 co-relation queries the response was YES. [2024-06-04 15:16:28,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44410 conditions, 5403 events. 3616/5403 cut-off events. For 206586/206586 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 27729 event pairs, 1225 based on Foata normal form. 10/5413 useless extension candidates. Maximal degree in co-relation 44321. Up to 4834 conditions per place. [2024-06-04 15:16:28,224 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 395 selfloop transitions, 73 changer transitions 0/472 dead transitions. [2024-06-04 15:16:28,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 472 transitions, 7842 flow [2024-06-04 15:16:28,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:16:28,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:16:28,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-04 15:16:28,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-04 15:16:28,225 INFO L175 Difference]: Start difference. First operand has 192 places, 417 transitions, 6040 flow. Second operand 9 states and 167 transitions. [2024-06-04 15:16:28,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 472 transitions, 7842 flow [2024-06-04 15:16:28,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 472 transitions, 7730 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-04 15:16:28,421 INFO L231 Difference]: Finished difference. Result has 197 places, 436 transitions, 6532 flow [2024-06-04 15:16:28,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5928, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6532, PETRI_PLACES=197, PETRI_TRANSITIONS=436} [2024-06-04 15:16:28,421 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 153 predicate places. [2024-06-04 15:16:28,421 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 436 transitions, 6532 flow [2024-06-04 15:16:28,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:28,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:28,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:28,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 15:16:28,422 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:16:28,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:28,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1091864813, now seen corresponding path program 6 times [2024-06-04 15:16:28,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:28,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909704406] [2024-06-04 15:16:28,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:28,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:29,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:29,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:29,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909704406] [2024-06-04 15:16:29,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909704406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:29,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:29,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:16:29,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128670997] [2024-06-04 15:16:29,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:29,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:16:29,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:29,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:16:29,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:16:29,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:16:29,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 436 transitions, 6532 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:29,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:29,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:16:29,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:30,356 INFO L124 PetriNetUnfolderBase]: 3611/5397 cut-off events. [2024-06-04 15:16:30,356 INFO L125 PetriNetUnfolderBase]: For 216608/216608 co-relation queries the response was YES. [2024-06-04 15:16:30,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45200 conditions, 5397 events. 3611/5397 cut-off events. For 216608/216608 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 27696 event pairs, 1252 based on Foata normal form. 2/5399 useless extension candidates. Maximal degree in co-relation 45109. Up to 5192 conditions per place. [2024-06-04 15:16:30,416 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 434 selfloop transitions, 23 changer transitions 0/461 dead transitions. [2024-06-04 15:16:30,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 461 transitions, 7666 flow [2024-06-04 15:16:30,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:16:30,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:16:30,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-04 15:16:30,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-04 15:16:30,418 INFO L175 Difference]: Start difference. First operand has 197 places, 436 transitions, 6532 flow. Second operand 8 states and 141 transitions. [2024-06-04 15:16:30,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 461 transitions, 7666 flow [2024-06-04 15:16:30,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 461 transitions, 7291 flow, removed 113 selfloop flow, removed 6 redundant places. [2024-06-04 15:16:30,671 INFO L231 Difference]: Finished difference. Result has 199 places, 439 transitions, 6316 flow [2024-06-04 15:16:30,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6159, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6316, PETRI_PLACES=199, PETRI_TRANSITIONS=439} [2024-06-04 15:16:30,671 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 155 predicate places. [2024-06-04 15:16:30,672 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 439 transitions, 6316 flow [2024-06-04 15:16:30,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:30,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:30,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:30,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 15:16:30,672 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:16:30,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:30,672 INFO L85 PathProgramCache]: Analyzing trace with hash 508144494, now seen corresponding path program 10 times [2024-06-04 15:16:30,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:30,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875727895] [2024-06-04 15:16:30,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:30,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:30,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:31,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:31,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875727895] [2024-06-04 15:16:31,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875727895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:31,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:31,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:16:31,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383097377] [2024-06-04 15:16:31,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:31,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:16:31,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:31,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:16:31,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:16:31,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:16:31,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 439 transitions, 6316 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:31,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:31,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:16:31,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:32,633 INFO L124 PetriNetUnfolderBase]: 3591/5368 cut-off events. [2024-06-04 15:16:32,633 INFO L125 PetriNetUnfolderBase]: For 218089/218089 co-relation queries the response was YES. [2024-06-04 15:16:32,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44184 conditions, 5368 events. 3591/5368 cut-off events. For 218089/218089 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 27490 event pairs, 1196 based on Foata normal form. 10/5378 useless extension candidates. Maximal degree in co-relation 44092. Up to 4818 conditions per place. [2024-06-04 15:16:32,690 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 400 selfloop transitions, 71 changer transitions 0/475 dead transitions. [2024-06-04 15:16:32,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 475 transitions, 7693 flow [2024-06-04 15:16:32,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:16:32,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:16:32,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-04 15:16:32,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-04 15:16:32,691 INFO L175 Difference]: Start difference. First operand has 199 places, 439 transitions, 6316 flow. Second operand 9 states and 165 transitions. [2024-06-04 15:16:32,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 475 transitions, 7693 flow [2024-06-04 15:16:32,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 475 transitions, 7488 flow, removed 82 selfloop flow, removed 6 redundant places. [2024-06-04 15:16:32,938 INFO L231 Difference]: Finished difference. Result has 202 places, 439 transitions, 6269 flow [2024-06-04 15:16:32,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6111, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6269, PETRI_PLACES=202, PETRI_TRANSITIONS=439} [2024-06-04 15:16:32,938 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 158 predicate places. [2024-06-04 15:16:32,939 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 439 transitions, 6269 flow [2024-06-04 15:16:32,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:32,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:32,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:32,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 15:16:32,939 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:16:32,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:32,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1477671676, now seen corresponding path program 1 times [2024-06-04 15:16:32,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:32,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075113359] [2024-06-04 15:16:32,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:32,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:32,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:33,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:33,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:33,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075113359] [2024-06-04 15:16:33,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075113359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:33,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:33,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:16:33,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065762226] [2024-06-04 15:16:33,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:33,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:16:33,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:33,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:16:33,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:16:33,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:16:33,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 439 transitions, 6269 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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) [2024-06-04 15:16:33,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:33,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:16:33,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:34,539 INFO L124 PetriNetUnfolderBase]: 3571/5268 cut-off events. [2024-06-04 15:16:34,539 INFO L125 PetriNetUnfolderBase]: For 247108/247247 co-relation queries the response was YES. [2024-06-04 15:16:34,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44894 conditions, 5268 events. 3571/5268 cut-off events. For 247108/247247 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 26591 event pairs, 1277 based on Foata normal form. 53/5285 useless extension candidates. Maximal degree in co-relation 44801. Up to 5065 conditions per place. [2024-06-04 15:16:34,595 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 413 selfloop transitions, 12 changer transitions 0/450 dead transitions. [2024-06-04 15:16:34,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 450 transitions, 7177 flow [2024-06-04 15:16:34,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:16:34,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:16:34,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-04 15:16:34,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-04 15:16:34,597 INFO L175 Difference]: Start difference. First operand has 202 places, 439 transitions, 6269 flow. Second operand 6 states and 102 transitions. [2024-06-04 15:16:34,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 450 transitions, 7177 flow [2024-06-04 15:16:34,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 450 transitions, 7013 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-04 15:16:34,853 INFO L231 Difference]: Finished difference. Result has 200 places, 442 transitions, 6167 flow [2024-06-04 15:16:34,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6105, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6167, PETRI_PLACES=200, PETRI_TRANSITIONS=442} [2024-06-04 15:16:34,853 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-04 15:16:34,853 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 442 transitions, 6167 flow [2024-06-04 15:16:34,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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) [2024-06-04 15:16:34,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:34,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:34,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 15:16:34,853 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:16:34,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:34,854 INFO L85 PathProgramCache]: Analyzing trace with hash 629099501, now seen corresponding path program 1 times [2024-06-04 15:16:34,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:34,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28347526] [2024-06-04 15:16:34,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:34,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:34,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:35,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:35,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:35,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28347526] [2024-06-04 15:16:35,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28347526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:35,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:35,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:16:35,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240927721] [2024-06-04 15:16:35,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:35,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:16:35,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:35,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:16:35,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:16:35,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:16:35,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 442 transitions, 6167 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:35,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:35,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:16:35,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:36,641 INFO L124 PetriNetUnfolderBase]: 3736/5559 cut-off events. [2024-06-04 15:16:36,642 INFO L125 PetriNetUnfolderBase]: For 266339/266346 co-relation queries the response was YES. [2024-06-04 15:16:36,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47531 conditions, 5559 events. 3736/5559 cut-off events. For 266339/266346 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 28503 event pairs, 890 based on Foata normal form. 10/5569 useless extension candidates. Maximal degree in co-relation 47438. Up to 5032 conditions per place. [2024-06-04 15:16:36,700 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 406 selfloop transitions, 80 changer transitions 0/491 dead transitions. [2024-06-04 15:16:36,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 491 transitions, 7799 flow [2024-06-04 15:16:36,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:16:36,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:16:36,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-04 15:16:36,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2024-06-04 15:16:36,701 INFO L175 Difference]: Start difference. First operand has 200 places, 442 transitions, 6167 flow. Second operand 10 states and 187 transitions. [2024-06-04 15:16:36,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 491 transitions, 7799 flow [2024-06-04 15:16:36,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 491 transitions, 7759 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 15:16:36,982 INFO L231 Difference]: Finished difference. Result has 208 places, 451 transitions, 6615 flow [2024-06-04 15:16:36,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6127, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6615, PETRI_PLACES=208, PETRI_TRANSITIONS=451} [2024-06-04 15:16:36,983 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 164 predicate places. [2024-06-04 15:16:36,983 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 451 transitions, 6615 flow [2024-06-04 15:16:36,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:36,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:36,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:36,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 15:16:36,983 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:16:36,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:36,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1215174109, now seen corresponding path program 1 times [2024-06-04 15:16:36,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:36,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920713941] [2024-06-04 15:16:36,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:36,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:36,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:37,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:37,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:37,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920713941] [2024-06-04 15:16:37,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920713941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:37,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:37,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:16:37,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250495102] [2024-06-04 15:16:37,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:37,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:16:37,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:37,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:16:37,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:16:37,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:16:37,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 451 transitions, 6615 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:37,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:37,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:16:37,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:39,035 INFO L124 PetriNetUnfolderBase]: 3954/5857 cut-off events. [2024-06-04 15:16:39,035 INFO L125 PetriNetUnfolderBase]: For 296782/296792 co-relation queries the response was YES. [2024-06-04 15:16:39,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51732 conditions, 5857 events. 3954/5857 cut-off events. For 296782/296792 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 30209 event pairs, 1011 based on Foata normal form. 8/5853 useless extension candidates. Maximal degree in co-relation 51636. Up to 4752 conditions per place. [2024-06-04 15:16:39,093 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 389 selfloop transitions, 142 changer transitions 0/536 dead transitions. [2024-06-04 15:16:39,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 536 transitions, 9138 flow [2024-06-04 15:16:39,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:16:39,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:16:39,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-04 15:16:39,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693446088794926 [2024-06-04 15:16:39,095 INFO L175 Difference]: Start difference. First operand has 208 places, 451 transitions, 6615 flow. Second operand 11 states and 222 transitions. [2024-06-04 15:16:39,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 536 transitions, 9138 flow [2024-06-04 15:16:39,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 536 transitions, 8885 flow, removed 82 selfloop flow, removed 6 redundant places. [2024-06-04 15:16:39,401 INFO L231 Difference]: Finished difference. Result has 215 places, 478 transitions, 7208 flow [2024-06-04 15:16:39,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6362, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7208, PETRI_PLACES=215, PETRI_TRANSITIONS=478} [2024-06-04 15:16:39,402 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 171 predicate places. [2024-06-04 15:16:39,402 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 478 transitions, 7208 flow [2024-06-04 15:16:39,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:39,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:39,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:39,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 15:16:39,403 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:16:39,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:39,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1212343065, now seen corresponding path program 2 times [2024-06-04 15:16:39,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:39,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230114471] [2024-06-04 15:16:39,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:39,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:40,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:40,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:40,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230114471] [2024-06-04 15:16:40,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230114471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:40,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:40,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:16:40,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90593665] [2024-06-04 15:16:40,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:40,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:16:40,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:40,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:16:40,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:16:40,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:16:40,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 478 transitions, 7208 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:40,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:40,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:16:40,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:41,498 INFO L124 PetriNetUnfolderBase]: 4046/6017 cut-off events. [2024-06-04 15:16:41,498 INFO L125 PetriNetUnfolderBase]: For 319269/319278 co-relation queries the response was YES. [2024-06-04 15:16:41,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54207 conditions, 6017 events. 4046/6017 cut-off events. For 319269/319278 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 31410 event pairs, 1090 based on Foata normal form. 12/6024 useless extension candidates. Maximal degree in co-relation 54108. Up to 5515 conditions per place. [2024-06-04 15:16:41,567 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 438 selfloop transitions, 91 changer transitions 0/534 dead transitions. [2024-06-04 15:16:41,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 534 transitions, 8886 flow [2024-06-04 15:16:41,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:16:41,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:16:41,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 204 transitions. [2024-06-04 15:16:41,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312896405919662 [2024-06-04 15:16:41,568 INFO L175 Difference]: Start difference. First operand has 215 places, 478 transitions, 7208 flow. Second operand 11 states and 204 transitions. [2024-06-04 15:16:41,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 534 transitions, 8886 flow [2024-06-04 15:16:41,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 534 transitions, 8730 flow, removed 64 selfloop flow, removed 3 redundant places. [2024-06-04 15:16:41,967 INFO L231 Difference]: Finished difference. Result has 224 places, 492 transitions, 7582 flow [2024-06-04 15:16:41,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7052, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7582, PETRI_PLACES=224, PETRI_TRANSITIONS=492} [2024-06-04 15:16:41,967 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 180 predicate places. [2024-06-04 15:16:41,968 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 492 transitions, 7582 flow [2024-06-04 15:16:41,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:41,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:41,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:41,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 15:16:41,968 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:16:41,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:41,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1185591615, now seen corresponding path program 3 times [2024-06-04 15:16:41,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:41,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632093596] [2024-06-04 15:16:41,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:41,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:42,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:42,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632093596] [2024-06-04 15:16:42,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632093596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:42,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:42,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:16:42,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54080247] [2024-06-04 15:16:42,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:42,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:16:42,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:42,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:16:42,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:16:42,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:16:42,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 492 transitions, 7582 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:42,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:42,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:16:42,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:44,130 INFO L124 PetriNetUnfolderBase]: 4049/6026 cut-off events. [2024-06-04 15:16:44,130 INFO L125 PetriNetUnfolderBase]: For 329629/329633 co-relation queries the response was YES. [2024-06-04 15:16:44,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54673 conditions, 6026 events. 4049/6026 cut-off events. For 329629/329633 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 31479 event pairs, 1114 based on Foata normal form. 8/6029 useless extension candidates. Maximal degree in co-relation 54571. Up to 5610 conditions per place. [2024-06-04 15:16:44,200 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 444 selfloop transitions, 81 changer transitions 0/530 dead transitions. [2024-06-04 15:16:44,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 530 transitions, 8868 flow [2024-06-04 15:16:44,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:16:44,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:16:44,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-04 15:16:44,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42071881606765327 [2024-06-04 15:16:44,201 INFO L175 Difference]: Start difference. First operand has 224 places, 492 transitions, 7582 flow. Second operand 11 states and 199 transitions. [2024-06-04 15:16:44,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 530 transitions, 8868 flow [2024-06-04 15:16:44,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 530 transitions, 8674 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-04 15:16:44,656 INFO L231 Difference]: Finished difference. Result has 229 places, 494 transitions, 7636 flow [2024-06-04 15:16:44,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7388, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7636, PETRI_PLACES=229, PETRI_TRANSITIONS=494} [2024-06-04 15:16:44,657 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 185 predicate places. [2024-06-04 15:16:44,657 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 494 transitions, 7636 flow [2024-06-04 15:16:44,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:44,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:44,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:44,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 15:16:44,657 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:16:44,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:44,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1869695745, now seen corresponding path program 4 times [2024-06-04 15:16:44,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:44,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936614453] [2024-06-04 15:16:44,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:44,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:44,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:45,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:45,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:45,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936614453] [2024-06-04 15:16:45,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936614453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:45,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:45,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:16:45,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233785594] [2024-06-04 15:16:45,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:45,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:16:45,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:45,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:16:45,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:16:45,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:16:45,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 494 transitions, 7636 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:45,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:45,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:16:45,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:47,082 INFO L124 PetriNetUnfolderBase]: 4207/6274 cut-off events. [2024-06-04 15:16:47,082 INFO L125 PetriNetUnfolderBase]: For 353497/353501 co-relation queries the response was YES. [2024-06-04 15:16:47,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57342 conditions, 6274 events. 4207/6274 cut-off events. For 353497/353501 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 33235 event pairs, 1096 based on Foata normal form. 8/6277 useless extension candidates. Maximal degree in co-relation 57238. Up to 5822 conditions per place. [2024-06-04 15:16:47,159 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 473 selfloop transitions, 80 changer transitions 0/558 dead transitions. [2024-06-04 15:16:47,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 558 transitions, 9580 flow [2024-06-04 15:16:47,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:16:47,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:16:47,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-04 15:16:47,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.427061310782241 [2024-06-04 15:16:47,161 INFO L175 Difference]: Start difference. First operand has 229 places, 494 transitions, 7636 flow. Second operand 11 states and 202 transitions. [2024-06-04 15:16:47,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 558 transitions, 9580 flow [2024-06-04 15:16:47,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 558 transitions, 9245 flow, removed 84 selfloop flow, removed 9 redundant places. [2024-06-04 15:16:47,796 INFO L231 Difference]: Finished difference. Result has 232 places, 516 transitions, 8056 flow [2024-06-04 15:16:47,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7364, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8056, PETRI_PLACES=232, PETRI_TRANSITIONS=516} [2024-06-04 15:16:47,797 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 188 predicate places. [2024-06-04 15:16:47,797 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 516 transitions, 8056 flow [2024-06-04 15:16:47,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:47,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:47,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:47,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 15:16:47,798 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:16:47,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:47,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1869635295, now seen corresponding path program 5 times [2024-06-04 15:16:47,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:47,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971074792] [2024-06-04 15:16:47,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:47,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:48,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:48,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:48,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971074792] [2024-06-04 15:16:48,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971074792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:48,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:48,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:16:48,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332725857] [2024-06-04 15:16:48,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:48,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:16:48,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:48,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:16:48,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:16:48,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:16:48,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 516 transitions, 8056 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:48,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:48,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:16:48,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:50,440 INFO L124 PetriNetUnfolderBase]: 4189/6250 cut-off events. [2024-06-04 15:16:50,440 INFO L125 PetriNetUnfolderBase]: For 360263/360267 co-relation queries the response was YES. [2024-06-04 15:16:50,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57054 conditions, 6250 events. 4189/6250 cut-off events. For 360263/360267 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 33175 event pairs, 1114 based on Foata normal form. 10/6255 useless extension candidates. Maximal degree in co-relation 56948. Up to 5903 conditions per place. [2024-06-04 15:16:50,506 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 480 selfloop transitions, 68 changer transitions 0/553 dead transitions. [2024-06-04 15:16:50,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 553 transitions, 9305 flow [2024-06-04 15:16:50,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:16:50,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:16:50,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 197 transitions. [2024-06-04 15:16:50,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4164904862579281 [2024-06-04 15:16:50,508 INFO L175 Difference]: Start difference. First operand has 232 places, 516 transitions, 8056 flow. Second operand 11 states and 197 transitions. [2024-06-04 15:16:50,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 553 transitions, 9305 flow [2024-06-04 15:16:51,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 553 transitions, 8968 flow, removed 137 selfloop flow, removed 6 redundant places. [2024-06-04 15:16:51,119 INFO L231 Difference]: Finished difference. Result has 237 places, 516 transitions, 7870 flow [2024-06-04 15:16:51,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7719, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7870, PETRI_PLACES=237, PETRI_TRANSITIONS=516} [2024-06-04 15:16:51,120 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 193 predicate places. [2024-06-04 15:16:51,120 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 516 transitions, 7870 flow [2024-06-04 15:16:51,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:51,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:51,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:51,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 15:16:51,121 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:16:51,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:51,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1869635171, now seen corresponding path program 2 times [2024-06-04 15:16:51,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:51,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446440697] [2024-06-04 15:16:51,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:51,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:52,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:52,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:52,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446440697] [2024-06-04 15:16:52,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446440697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:52,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:52,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:16:52,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29194093] [2024-06-04 15:16:52,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:52,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:16:52,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:52,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:16:52,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:16:52,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:16:52,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 516 transitions, 7870 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:52,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:52,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:16:52,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:53,770 INFO L124 PetriNetUnfolderBase]: 4371/6510 cut-off events. [2024-06-04 15:16:53,771 INFO L125 PetriNetUnfolderBase]: For 381254/381258 co-relation queries the response was YES. [2024-06-04 15:16:53,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59457 conditions, 6510 events. 4371/6510 cut-off events. For 381254/381258 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 34760 event pairs, 1096 based on Foata normal form. 12/6517 useless extension candidates. Maximal degree in co-relation 59349. Up to 5774 conditions per place. [2024-06-04 15:16:53,849 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 447 selfloop transitions, 143 changer transitions 0/595 dead transitions. [2024-06-04 15:16:53,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 595 transitions, 10212 flow [2024-06-04 15:16:53,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 15:16:53,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 15:16:53,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 234 transitions. [2024-06-04 15:16:53,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-04 15:16:53,850 INFO L175 Difference]: Start difference. First operand has 237 places, 516 transitions, 7870 flow. Second operand 12 states and 234 transitions. [2024-06-04 15:16:53,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 595 transitions, 10212 flow [2024-06-04 15:16:54,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 595 transitions, 10091 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-04 15:16:54,356 INFO L231 Difference]: Finished difference. Result has 243 places, 544 transitions, 8618 flow [2024-06-04 15:16:54,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7749, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8618, PETRI_PLACES=243, PETRI_TRANSITIONS=544} [2024-06-04 15:16:54,357 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 199 predicate places. [2024-06-04 15:16:54,357 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 544 transitions, 8618 flow [2024-06-04 15:16:54,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:54,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:54,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:54,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 15:16:54,358 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:16:54,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:54,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1751542841, now seen corresponding path program 3 times [2024-06-04 15:16:54,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:54,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875305324] [2024-06-04 15:16:54,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:54,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:54,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:55,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:55,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:55,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875305324] [2024-06-04 15:16:55,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875305324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:55,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:55,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:16:55,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203944026] [2024-06-04 15:16:55,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:55,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:16:55,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:55,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:16:55,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:16:55,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:16:55,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 544 transitions, 8618 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:55,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:55,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:16:55,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:57,050 INFO L124 PetriNetUnfolderBase]: 4417/6575 cut-off events. [2024-06-04 15:16:57,051 INFO L125 PetriNetUnfolderBase]: For 405271/405279 co-relation queries the response was YES. [2024-06-04 15:16:57,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61382 conditions, 6575 events. 4417/6575 cut-off events. For 405271/405279 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 35227 event pairs, 1021 based on Foata normal form. 12/6582 useless extension candidates. Maximal degree in co-relation 61271. Up to 5154 conditions per place. [2024-06-04 15:16:57,132 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 401 selfloop transitions, 220 changer transitions 0/626 dead transitions. [2024-06-04 15:16:57,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 626 transitions, 11006 flow [2024-06-04 15:16:57,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:16:57,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:16:57,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-04 15:16:57,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-04 15:16:57,134 INFO L175 Difference]: Start difference. First operand has 243 places, 544 transitions, 8618 flow. Second operand 10 states and 205 transitions. [2024-06-04 15:16:57,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 626 transitions, 11006 flow [2024-06-04 15:16:57,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 626 transitions, 10682 flow, removed 105 selfloop flow, removed 6 redundant places. [2024-06-04 15:16:57,758 INFO L231 Difference]: Finished difference. Result has 247 places, 548 transitions, 8862 flow [2024-06-04 15:16:57,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8294, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8862, PETRI_PLACES=247, PETRI_TRANSITIONS=548} [2024-06-04 15:16:57,758 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 203 predicate places. [2024-06-04 15:16:57,758 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 548 transitions, 8862 flow [2024-06-04 15:16:57,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:57,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:57,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:57,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 15:16:57,761 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:16:57,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:57,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1520501369, now seen corresponding path program 6 times [2024-06-04 15:16:57,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:57,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219944308] [2024-06-04 15:16:57,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:57,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:58,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:58,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:58,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219944308] [2024-06-04 15:16:58,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219944308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:58,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:58,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:16:58,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411190335] [2024-06-04 15:16:58,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:58,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:16:58,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:58,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:16:58,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:16:58,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:16:58,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 548 transitions, 8862 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:58,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:58,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:16:58,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:17:00,446 INFO L124 PetriNetUnfolderBase]: 4422/6583 cut-off events. [2024-06-04 15:17:00,446 INFO L125 PetriNetUnfolderBase]: For 421315/421327 co-relation queries the response was YES. [2024-06-04 15:17:00,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62985 conditions, 6583 events. 4422/6583 cut-off events. For 421315/421327 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 35099 event pairs, 1102 based on Foata normal form. 12/6590 useless extension candidates. Maximal degree in co-relation 62872. Up to 6187 conditions per place. [2024-06-04 15:17:00,531 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 489 selfloop transitions, 91 changer transitions 0/585 dead transitions. [2024-06-04 15:17:00,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 585 transitions, 10335 flow [2024-06-04 15:17:00,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:17:00,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:17:00,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-04 15:17:00,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255813953488372 [2024-06-04 15:17:00,532 INFO L175 Difference]: Start difference. First operand has 247 places, 548 transitions, 8862 flow. Second operand 10 states and 183 transitions. [2024-06-04 15:17:00,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 585 transitions, 10335 flow [2024-06-04 15:17:01,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 585 transitions, 9825 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-04 15:17:01,093 INFO L231 Difference]: Finished difference. Result has 250 places, 550 transitions, 8649 flow [2024-06-04 15:17:01,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8352, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8649, PETRI_PLACES=250, PETRI_TRANSITIONS=550} [2024-06-04 15:17:01,094 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 206 predicate places. [2024-06-04 15:17:01,094 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 550 transitions, 8649 flow [2024-06-04 15:17:01,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:01,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:17:01,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:17:01,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 15:17:01,095 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:17:01,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:17:01,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1520501245, now seen corresponding path program 4 times [2024-06-04 15:17:01,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:17:01,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744556821] [2024-06-04 15:17:01,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:17:01,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:17:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:17:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:17:02,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:17:02,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744556821] [2024-06-04 15:17:02,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744556821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:17:02,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:17:02,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:17:02,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218429933] [2024-06-04 15:17:02,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:17:02,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:17:02,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:17:02,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:17:02,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:17:02,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:17:02,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 550 transitions, 8649 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:02,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:17:02,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:17:02,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:17:04,052 INFO L124 PetriNetUnfolderBase]: 4526/6733 cut-off events. [2024-06-04 15:17:04,052 INFO L125 PetriNetUnfolderBase]: For 448165/448175 co-relation queries the response was YES. [2024-06-04 15:17:04,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64050 conditions, 6733 events. 4526/6733 cut-off events. For 448165/448175 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 36154 event pairs, 1021 based on Foata normal form. 12/6740 useless extension candidates. Maximal degree in co-relation 63936. Up to 5184 conditions per place. [2024-06-04 15:17:04,138 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 409 selfloop transitions, 230 changer transitions 0/644 dead transitions. [2024-06-04 15:17:04,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 644 transitions, 11467 flow [2024-06-04 15:17:04,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:17:04,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:17:04,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 226 transitions. [2024-06-04 15:17:04,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47780126849894294 [2024-06-04 15:17:04,140 INFO L175 Difference]: Start difference. First operand has 250 places, 550 transitions, 8649 flow. Second operand 11 states and 226 transitions. [2024-06-04 15:17:04,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 644 transitions, 11467 flow [2024-06-04 15:17:04,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 644 transitions, 11188 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-04 15:17:04,777 INFO L231 Difference]: Finished difference. Result has 254 places, 558 transitions, 9086 flow [2024-06-04 15:17:04,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8370, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9086, PETRI_PLACES=254, PETRI_TRANSITIONS=558} [2024-06-04 15:17:04,778 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 210 predicate places. [2024-06-04 15:17:04,778 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 558 transitions, 9086 flow [2024-06-04 15:17:04,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:04,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:17:04,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:17:04,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 15:17:04,779 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:17:04,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:17:04,779 INFO L85 PathProgramCache]: Analyzing trace with hash -37188677, now seen corresponding path program 5 times [2024-06-04 15:17:04,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:17:04,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412656192] [2024-06-04 15:17:04,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:17:04,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:17:04,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:17:05,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:17:05,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:17:05,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412656192] [2024-06-04 15:17:05,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412656192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:17:05,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:17:05,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:17:05,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527252400] [2024-06-04 15:17:05,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:17:05,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:17:05,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:17:05,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:17:05,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:17:05,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:17:05,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 558 transitions, 9086 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:05,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:17:05,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:17:05,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:17:07,688 INFO L124 PetriNetUnfolderBase]: 4530/6739 cut-off events. [2024-06-04 15:17:07,689 INFO L125 PetriNetUnfolderBase]: For 469523/469533 co-relation queries the response was YES. [2024-06-04 15:17:07,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65760 conditions, 6739 events. 4530/6739 cut-off events. For 469523/469533 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 36200 event pairs, 995 based on Foata normal form. 12/6746 useless extension candidates. Maximal degree in co-relation 65644. Up to 5318 conditions per place. [2024-06-04 15:17:07,778 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 395 selfloop transitions, 240 changer transitions 0/640 dead transitions. [2024-06-04 15:17:07,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 640 transitions, 11472 flow [2024-06-04 15:17:07,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:17:07,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:17:07,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-04 15:17:07,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744186046511628 [2024-06-04 15:17:07,779 INFO L175 Difference]: Start difference. First operand has 254 places, 558 transitions, 9086 flow. Second operand 10 states and 204 transitions. [2024-06-04 15:17:07,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 640 transitions, 11472 flow [2024-06-04 15:17:08,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 640 transitions, 11039 flow, removed 88 selfloop flow, removed 7 redundant places. [2024-06-04 15:17:08,529 INFO L231 Difference]: Finished difference. Result has 257 places, 562 transitions, 9282 flow [2024-06-04 15:17:08,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8679, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9282, PETRI_PLACES=257, PETRI_TRANSITIONS=562} [2024-06-04 15:17:08,531 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-04 15:17:08,532 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 562 transitions, 9282 flow [2024-06-04 15:17:08,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:08,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:17:08,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:17:08,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 15:17:08,532 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:17:08,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:17:08,533 INFO L85 PathProgramCache]: Analyzing trace with hash -37181733, now seen corresponding path program 1 times [2024-06-04 15:17:08,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:17:08,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400716160] [2024-06-04 15:17:08,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:17:08,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:17:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:17:09,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:17:09,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:17:09,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400716160] [2024-06-04 15:17:09,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400716160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:17:09,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:17:09,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:17:09,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920082971] [2024-06-04 15:17:09,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:17:09,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:17:09,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:17:09,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:17:09,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:17:09,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:17:09,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 562 transitions, 9282 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:09,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:17:09,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:17:09,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:17:11,044 INFO L124 PetriNetUnfolderBase]: 4590/6825 cut-off events. [2024-06-04 15:17:11,045 INFO L125 PetriNetUnfolderBase]: For 489477/489485 co-relation queries the response was YES. [2024-06-04 15:17:11,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67681 conditions, 6825 events. 4590/6825 cut-off events. For 489477/489485 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 36746 event pairs, 1097 based on Foata normal form. 10/6830 useless extension candidates. Maximal degree in co-relation 67563. Up to 6219 conditions per place. [2024-06-04 15:17:11,142 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 519 selfloop transitions, 100 changer transitions 0/624 dead transitions. [2024-06-04 15:17:11,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 624 transitions, 11456 flow [2024-06-04 15:17:11,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:17:11,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:17:11,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-04 15:17:11,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-04 15:17:11,143 INFO L175 Difference]: Start difference. First operand has 257 places, 562 transitions, 9282 flow. Second operand 9 states and 182 transitions. [2024-06-04 15:17:11,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 624 transitions, 11456 flow [2024-06-04 15:17:11,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 624 transitions, 10974 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-04 15:17:11,877 INFO L231 Difference]: Finished difference. Result has 260 places, 582 transitions, 9388 flow [2024-06-04 15:17:11,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8806, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9388, PETRI_PLACES=260, PETRI_TRANSITIONS=582} [2024-06-04 15:17:11,878 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 216 predicate places. [2024-06-04 15:17:11,878 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 582 transitions, 9388 flow [2024-06-04 15:17:11,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:11,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:17:11,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:17:11,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 15:17:11,878 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)] === [2024-06-04 15:17:11,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:17:11,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1699628745, now seen corresponding path program 1 times [2024-06-04 15:17:11,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:17:11,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791088867] [2024-06-04 15:17:11,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:17:11,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:17:11,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:17:12,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:17:12,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:17:12,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791088867] [2024-06-04 15:17:12,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791088867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:17:12,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:17:12,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:17:12,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721009105] [2024-06-04 15:17:12,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:17:12,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:17:12,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:17:12,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:17:12,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:17:12,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:17:12,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 582 transitions, 9388 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:12,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:17:12,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:17:12,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:17:13,860 INFO L124 PetriNetUnfolderBase]: 4340/6531 cut-off events. [2024-06-04 15:17:13,860 INFO L125 PetriNetUnfolderBase]: For 496924/497039 co-relation queries the response was YES. [2024-06-04 15:17:13,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64972 conditions, 6531 events. 4340/6531 cut-off events. For 496924/497039 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 35800 event pairs, 1086 based on Foata normal form. 21/6517 useless extension candidates. Maximal degree in co-relation 64852. Up to 6107 conditions per place. [2024-06-04 15:17:13,944 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 509 selfloop transitions, 56 changer transitions 0/600 dead transitions. [2024-06-04 15:17:13,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 600 transitions, 10692 flow [2024-06-04 15:17:13,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:17:13,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:17:13,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-04 15:17:13,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-04 15:17:13,945 INFO L175 Difference]: Start difference. First operand has 260 places, 582 transitions, 9388 flow. Second operand 7 states and 134 transitions. [2024-06-04 15:17:13,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 600 transitions, 10692 flow [2024-06-04 15:17:14,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 600 transitions, 10093 flow, removed 109 selfloop flow, removed 9 redundant places. [2024-06-04 15:17:14,621 INFO L231 Difference]: Finished difference. Result has 258 places, 582 transitions, 8926 flow [2024-06-04 15:17:14,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8789, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8926, PETRI_PLACES=258, PETRI_TRANSITIONS=582} [2024-06-04 15:17:14,621 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 214 predicate places. [2024-06-04 15:17:14,622 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 582 transitions, 8926 flow [2024-06-04 15:17:14,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:14,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:17:14,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:17:14,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 15:17:14,622 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:17:14,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:17:14,623 INFO L85 PathProgramCache]: Analyzing trace with hash 979598911, now seen corresponding path program 7 times [2024-06-04 15:17:14,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:17:14,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280069883] [2024-06-04 15:17:14,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:17:14,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:17:14,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:17:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:17:15,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:17:15,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280069883] [2024-06-04 15:17:15,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280069883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:17:15,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:17:15,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:17:15,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641115435] [2024-06-04 15:17:15,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:17:15,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:17:15,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:17:15,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:17:15,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:17:15,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:17:15,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 582 transitions, 8926 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:15,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:17:15,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:17:15,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:17:17,385 INFO L124 PetriNetUnfolderBase]: 4594/6844 cut-off events. [2024-06-04 15:17:17,385 INFO L125 PetriNetUnfolderBase]: For 518622/518635 co-relation queries the response was YES. [2024-06-04 15:17:17,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66389 conditions, 6844 events. 4594/6844 cut-off events. For 518622/518635 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 36968 event pairs, 940 based on Foata normal form. 14/6853 useless extension candidates. Maximal degree in co-relation 66272. Up to 6060 conditions per place. [2024-06-04 15:17:17,479 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 490 selfloop transitions, 132 changer transitions 0/627 dead transitions. [2024-06-04 15:17:17,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 627 transitions, 10730 flow [2024-06-04 15:17:17,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:17:17,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:17:17,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-04 15:17:17,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-04 15:17:17,480 INFO L175 Difference]: Start difference. First operand has 258 places, 582 transitions, 8926 flow. Second operand 10 states and 186 transitions. [2024-06-04 15:17:17,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 627 transitions, 10730 flow [2024-06-04 15:17:18,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 627 transitions, 10607 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-04 15:17:18,311 INFO L231 Difference]: Finished difference. Result has 263 places, 586 transitions, 9246 flow [2024-06-04 15:17:18,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8803, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9246, PETRI_PLACES=263, PETRI_TRANSITIONS=586} [2024-06-04 15:17:18,311 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 219 predicate places. [2024-06-04 15:17:18,312 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 586 transitions, 9246 flow [2024-06-04 15:17:18,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:18,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:17:18,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:17:18,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 15:17:18,312 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:17:18,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:17:18,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1969143849, now seen corresponding path program 8 times [2024-06-04 15:17:18,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:17:18,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638100083] [2024-06-04 15:17:18,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:17:18,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:17:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:17:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:17:19,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:17:19,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638100083] [2024-06-04 15:17:19,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638100083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:17:19,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:17:19,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:17:19,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922978858] [2024-06-04 15:17:19,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:17:19,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:17:19,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:17:19,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:17:19,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:17:19,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:17:19,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 586 transitions, 9246 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:19,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:17:19,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:17:19,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:17:21,032 INFO L124 PetriNetUnfolderBase]: 4576/6821 cut-off events. [2024-06-04 15:17:21,033 INFO L125 PetriNetUnfolderBase]: For 522889/522895 co-relation queries the response was YES. [2024-06-04 15:17:21,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66642 conditions, 6821 events. 4576/6821 cut-off events. For 522889/522895 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 36790 event pairs, 1147 based on Foata normal form. 10/6826 useless extension candidates. Maximal degree in co-relation 66524. Up to 6312 conditions per place. [2024-06-04 15:17:21,128 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 516 selfloop transitions, 102 changer transitions 0/623 dead transitions. [2024-06-04 15:17:21,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 623 transitions, 10690 flow [2024-06-04 15:17:21,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:17:21,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:17:21,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-04 15:17:21,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-04 15:17:21,129 INFO L175 Difference]: Start difference. First operand has 263 places, 586 transitions, 9246 flow. Second operand 10 states and 182 transitions. [2024-06-04 15:17:21,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 623 transitions, 10690 flow [2024-06-04 15:17:21,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 623 transitions, 10200 flow, removed 143 selfloop flow, removed 8 redundant places. [2024-06-04 15:17:21,966 INFO L231 Difference]: Finished difference. Result has 265 places, 586 transitions, 8988 flow [2024-06-04 15:17:21,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8756, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8988, PETRI_PLACES=265, PETRI_TRANSITIONS=586} [2024-06-04 15:17:21,966 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 221 predicate places. [2024-06-04 15:17:21,966 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 586 transitions, 8988 flow [2024-06-04 15:17:21,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:21,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:17:21,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:17:21,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 15:17:21,967 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:17:21,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:17:21,967 INFO L85 PathProgramCache]: Analyzing trace with hash -116312795, now seen corresponding path program 6 times [2024-06-04 15:17:21,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:17:21,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577080381] [2024-06-04 15:17:21,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:17:21,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:17:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:17:22,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:17:22,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:17:22,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577080381] [2024-06-04 15:17:22,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577080381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:17:22,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:17:22,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:17:22,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266724767] [2024-06-04 15:17:22,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:17:22,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:17:22,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:17:22,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:17:22,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:17:22,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:17:22,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 586 transitions, 8988 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:22,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:17:22,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:17:22,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:17:24,643 INFO L124 PetriNetUnfolderBase]: 4980/7400 cut-off events. [2024-06-04 15:17:24,644 INFO L125 PetriNetUnfolderBase]: For 517802/517812 co-relation queries the response was YES. [2024-06-04 15:17:24,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70724 conditions, 7400 events. 4980/7400 cut-off events. For 517802/517812 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 40411 event pairs, 1089 based on Foata normal form. 12/7400 useless extension candidates. Maximal degree in co-relation 70606. Up to 5935 conditions per place. [2024-06-04 15:17:24,743 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 453 selfloop transitions, 241 changer transitions 0/699 dead transitions. [2024-06-04 15:17:24,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 699 transitions, 12331 flow [2024-06-04 15:17:24,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:17:24,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:17:24,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-04 15:17:24,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4720930232558139 [2024-06-04 15:17:24,745 INFO L175 Difference]: Start difference. First operand has 265 places, 586 transitions, 8988 flow. Second operand 10 states and 203 transitions. [2024-06-04 15:17:24,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 699 transitions, 12331 flow [2024-06-04 15:17:25,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 699 transitions, 12049 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-04 15:17:25,517 INFO L231 Difference]: Finished difference. Result has 267 places, 642 transitions, 10258 flow [2024-06-04 15:17:25,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8769, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10258, PETRI_PLACES=267, PETRI_TRANSITIONS=642} [2024-06-04 15:17:25,517 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 223 predicate places. [2024-06-04 15:17:25,517 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 642 transitions, 10258 flow [2024-06-04 15:17:25,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:25,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:17:25,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:17:25,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 15:17:25,518 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:17:25,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:17:25,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1971945133, now seen corresponding path program 7 times [2024-06-04 15:17:25,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:17:25,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149929493] [2024-06-04 15:17:25,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:17:25,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:17:25,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:17:26,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:17:26,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:17:26,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149929493] [2024-06-04 15:17:26,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149929493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:17:26,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:17:26,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:17:26,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8968209] [2024-06-04 15:17:26,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:17:26,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:17:26,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:17:26,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:17:26,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:17:26,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:17:26,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 642 transitions, 10258 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:26,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:17:26,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:17:26,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:17:28,477 INFO L124 PetriNetUnfolderBase]: 5166/7662 cut-off events. [2024-06-04 15:17:28,478 INFO L125 PetriNetUnfolderBase]: For 512080/512090 co-relation queries the response was YES. [2024-06-04 15:17:28,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73664 conditions, 7662 events. 5166/7662 cut-off events. For 512080/512090 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 42054 event pairs, 1184 based on Foata normal form. 12/7663 useless extension candidates. Maximal degree in co-relation 73545. Up to 6812 conditions per place. [2024-06-04 15:17:28,568 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 528 selfloop transitions, 171 changer transitions 0/704 dead transitions. [2024-06-04 15:17:28,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 704 transitions, 12523 flow [2024-06-04 15:17:28,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:17:28,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:17:28,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-04 15:17:28,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-04 15:17:28,569 INFO L175 Difference]: Start difference. First operand has 267 places, 642 transitions, 10258 flow. Second operand 9 states and 176 transitions. [2024-06-04 15:17:28,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 704 transitions, 12523 flow [2024-06-04 15:17:29,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 704 transitions, 11894 flow, removed 153 selfloop flow, removed 6 redundant places. [2024-06-04 15:17:29,238 INFO L231 Difference]: Finished difference. Result has 270 places, 664 transitions, 10397 flow [2024-06-04 15:17:29,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9683, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10397, PETRI_PLACES=270, PETRI_TRANSITIONS=664} [2024-06-04 15:17:29,239 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 226 predicate places. [2024-06-04 15:17:29,239 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 664 transitions, 10397 flow [2024-06-04 15:17:29,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:29,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:17:29,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:17:29,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 15:17:29,240 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:17:29,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:17:29,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1971940483, now seen corresponding path program 8 times [2024-06-04 15:17:29,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:17:29,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734459003] [2024-06-04 15:17:29,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:17:29,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:17:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:17:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:17:30,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:17:30,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734459003] [2024-06-04 15:17:30,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734459003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:17:30,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:17:30,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:17:30,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083272945] [2024-06-04 15:17:30,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:17:30,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:17:30,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:17:30,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:17:30,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:17:30,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:17:30,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 664 transitions, 10397 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:30,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:17:30,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:17:30,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:17:32,276 INFO L124 PetriNetUnfolderBase]: 5344/7927 cut-off events. [2024-06-04 15:17:32,276 INFO L125 PetriNetUnfolderBase]: For 523328/523332 co-relation queries the response was YES. [2024-06-04 15:17:32,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74708 conditions, 7927 events. 5344/7927 cut-off events. For 523328/523332 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 43747 event pairs, 1511 based on Foata normal form. 10/7932 useless extension candidates. Maximal degree in co-relation 74588. Up to 7171 conditions per place. [2024-06-04 15:17:32,372 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 608 selfloop transitions, 136 changer transitions 0/749 dead transitions. [2024-06-04 15:17:32,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 749 transitions, 13180 flow [2024-06-04 15:17:32,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:17:32,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:17:32,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-04 15:17:32,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.427061310782241 [2024-06-04 15:17:32,374 INFO L175 Difference]: Start difference. First operand has 270 places, 664 transitions, 10397 flow. Second operand 11 states and 202 transitions. [2024-06-04 15:17:32,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 749 transitions, 13180 flow [2024-06-04 15:17:33,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 749 transitions, 12741 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-04 15:17:33,288 INFO L231 Difference]: Finished difference. Result has 275 places, 700 transitions, 11002 flow [2024-06-04 15:17:33,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9976, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11002, PETRI_PLACES=275, PETRI_TRANSITIONS=700} [2024-06-04 15:17:33,288 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-04 15:17:33,289 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 700 transitions, 11002 flow [2024-06-04 15:17:33,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:33,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:17:33,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:17:33,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 15:17:33,289 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:17:33,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:17:33,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1774761, now seen corresponding path program 9 times [2024-06-04 15:17:33,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:17:33,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512139011] [2024-06-04 15:17:33,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:17:33,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:17:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:17:34,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:17:34,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:17:34,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512139011] [2024-06-04 15:17:34,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512139011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:17:34,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:17:34,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:17:34,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927217759] [2024-06-04 15:17:34,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:17:34,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:17:34,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:17:34,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:17:34,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:17:34,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:17:34,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 700 transitions, 11002 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:34,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:17:34,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:17:34,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:17:36,102 INFO L124 PetriNetUnfolderBase]: 5361/7952 cut-off events. [2024-06-04 15:17:36,102 INFO L125 PetriNetUnfolderBase]: For 539638/539650 co-relation queries the response was YES. [2024-06-04 15:17:36,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75707 conditions, 7952 events. 5361/7952 cut-off events. For 539638/539650 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 43906 event pairs, 1193 based on Foata normal form. 12/7959 useless extension candidates. Maximal degree in co-relation 75585. Up to 7503 conditions per place. [2024-06-04 15:17:36,218 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 634 selfloop transitions, 94 changer transitions 0/733 dead transitions. [2024-06-04 15:17:36,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 733 transitions, 12801 flow [2024-06-04 15:17:36,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:17:36,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:17:36,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-04 15:17:36,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-04 15:17:36,219 INFO L175 Difference]: Start difference. First operand has 275 places, 700 transitions, 11002 flow. Second operand 9 states and 164 transitions. [2024-06-04 15:17:36,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 733 transitions, 12801 flow [2024-06-04 15:17:37,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 733 transitions, 12457 flow, removed 77 selfloop flow, removed 8 redundant places. [2024-06-04 15:17:37,219 INFO L231 Difference]: Finished difference. Result has 276 places, 702 transitions, 10986 flow [2024-06-04 15:17:37,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10658, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10986, PETRI_PLACES=276, PETRI_TRANSITIONS=702} [2024-06-04 15:17:37,220 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 232 predicate places. [2024-06-04 15:17:37,220 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 702 transitions, 10986 flow [2024-06-04 15:17:37,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:37,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:17:37,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:17:37,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 15:17:37,221 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:17:37,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:17:37,221 INFO L85 PathProgramCache]: Analyzing trace with hash 2087231653, now seen corresponding path program 9 times [2024-06-04 15:17:37,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:17:37,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485188188] [2024-06-04 15:17:37,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:17:37,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:17:37,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:17:38,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:17:38,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:17:38,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485188188] [2024-06-04 15:17:38,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485188188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:17:38,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:17:38,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:17:38,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806880150] [2024-06-04 15:17:38,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:17:38,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:17:38,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:17:38,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:17:38,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:17:38,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:17:38,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 702 transitions, 10986 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:38,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:17:38,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:17:38,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:17:40,220 INFO L124 PetriNetUnfolderBase]: 5566/8252 cut-off events. [2024-06-04 15:17:40,220 INFO L125 PetriNetUnfolderBase]: For 577450/577456 co-relation queries the response was YES. [2024-06-04 15:17:40,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78279 conditions, 8252 events. 5566/8252 cut-off events. For 577450/577456 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 45848 event pairs, 1516 based on Foata normal form. 8/8255 useless extension candidates. Maximal degree in co-relation 78156. Up to 6766 conditions per place. [2024-06-04 15:17:40,336 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 564 selfloop transitions, 221 changer transitions 0/790 dead transitions. [2024-06-04 15:17:40,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 790 transitions, 14115 flow [2024-06-04 15:17:40,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:17:40,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:17:40,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-04 15:17:40,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44820295983086683 [2024-06-04 15:17:40,338 INFO L175 Difference]: Start difference. First operand has 276 places, 702 transitions, 10986 flow. Second operand 11 states and 212 transitions. [2024-06-04 15:17:40,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 790 transitions, 14115 flow [2024-06-04 15:17:41,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 790 transitions, 13796 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-04 15:17:41,439 INFO L231 Difference]: Finished difference. Result has 281 places, 727 transitions, 11640 flow [2024-06-04 15:17:41,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10686, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11640, PETRI_PLACES=281, PETRI_TRANSITIONS=727} [2024-06-04 15:17:41,448 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 237 predicate places. [2024-06-04 15:17:41,449 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 727 transitions, 11640 flow [2024-06-04 15:17:41,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:41,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:17:41,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:17:41,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 15:17:41,449 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:17:41,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:17:41,450 INFO L85 PathProgramCache]: Analyzing trace with hash 2087409283, now seen corresponding path program 10 times [2024-06-04 15:17:41,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:17:41,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732272411] [2024-06-04 15:17:41,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:17:41,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:17:41,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:17:42,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:17:42,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:17:42,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732272411] [2024-06-04 15:17:42,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732272411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:17:42,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:17:42,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:17:42,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725638531] [2024-06-04 15:17:42,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:17:42,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:17:42,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:17:42,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:17:42,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:17:42,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:17:42,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 727 transitions, 11640 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:42,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:17:42,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:17:42,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:17:44,479 INFO L124 PetriNetUnfolderBase]: 5579/8267 cut-off events. [2024-06-04 15:17:44,479 INFO L125 PetriNetUnfolderBase]: For 593856/593862 co-relation queries the response was YES. [2024-06-04 15:17:44,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80029 conditions, 8267 events. 5579/8267 cut-off events. For 593856/593862 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 45728 event pairs, 999 based on Foata normal form. 10/8277 useless extension candidates. Maximal degree in co-relation 79904. Up to 6489 conditions per place. [2024-06-04 15:17:44,575 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 468 selfloop transitions, 312 changer transitions 0/785 dead transitions. [2024-06-04 15:17:44,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 785 transitions, 14265 flow [2024-06-04 15:17:44,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:17:44,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:17:44,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-04 15:17:44,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754521963824289 [2024-06-04 15:17:44,576 INFO L175 Difference]: Start difference. First operand has 281 places, 727 transitions, 11640 flow. Second operand 9 states and 184 transitions. [2024-06-04 15:17:44,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 785 transitions, 14265 flow [2024-06-04 15:17:45,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 785 transitions, 13844 flow, removed 97 selfloop flow, removed 7 redundant places. [2024-06-04 15:17:45,385 INFO L231 Difference]: Finished difference. Result has 284 places, 734 transitions, 12196 flow [2024-06-04 15:17:45,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11245, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12196, PETRI_PLACES=284, PETRI_TRANSITIONS=734} [2024-06-04 15:17:45,386 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 240 predicate places. [2024-06-04 15:17:45,386 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 734 transitions, 12196 flow [2024-06-04 15:17:45,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:45,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:17:45,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:17:45,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 15:17:45,386 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:17:45,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:17:45,387 INFO L85 PathProgramCache]: Analyzing trace with hash 2087416227, now seen corresponding path program 2 times [2024-06-04 15:17:45,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:17:45,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889226642] [2024-06-04 15:17:45,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:17:45,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:17:45,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:17:46,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:17:46,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:17:46,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889226642] [2024-06-04 15:17:46,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889226642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:17:46,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:17:46,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:17:46,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663199476] [2024-06-04 15:17:46,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:17:46,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:17:46,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:17:46,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:17:46,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:17:46,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:17:46,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 734 transitions, 12196 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:46,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:17:46,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:17:46,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:17:48,456 INFO L124 PetriNetUnfolderBase]: 5601/8298 cut-off events. [2024-06-04 15:17:48,456 INFO L125 PetriNetUnfolderBase]: For 617859/617863 co-relation queries the response was YES. [2024-06-04 15:17:48,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82656 conditions, 8298 events. 5601/8298 cut-off events. For 617859/617863 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 46061 event pairs, 1221 based on Foata normal form. 10/8308 useless extension candidates. Maximal degree in co-relation 82528. Up to 7637 conditions per place. [2024-06-04 15:17:48,567 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 665 selfloop transitions, 104 changer transitions 0/774 dead transitions. [2024-06-04 15:17:48,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 774 transitions, 14402 flow [2024-06-04 15:17:48,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:17:48,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:17:48,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-04 15:17:48,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-04 15:17:48,577 INFO L175 Difference]: Start difference. First operand has 284 places, 734 transitions, 12196 flow. Second operand 8 states and 160 transitions. [2024-06-04 15:17:48,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 774 transitions, 14402 flow [2024-06-04 15:17:49,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 774 transitions, 13792 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-04 15:17:49,670 INFO L231 Difference]: Finished difference. Result has 286 places, 737 transitions, 11937 flow [2024-06-04 15:17:49,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11586, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=630, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11937, PETRI_PLACES=286, PETRI_TRANSITIONS=737} [2024-06-04 15:17:49,671 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 242 predicate places. [2024-06-04 15:17:49,671 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 737 transitions, 11937 flow [2024-06-04 15:17:49,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:49,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:17:49,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:17:49,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 15:17:49,671 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)] === [2024-06-04 15:17:49,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:17:49,672 INFO L85 PathProgramCache]: Analyzing trace with hash 938294797, now seen corresponding path program 2 times [2024-06-04 15:17:49,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:17:49,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108211953] [2024-06-04 15:17:49,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:17:49,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:17:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:17:50,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:17:50,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:17:50,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108211953] [2024-06-04 15:17:50,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108211953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:17:50,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:17:50,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:17:50,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664283211] [2024-06-04 15:17:50,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:17:50,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:17:50,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:17:50,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:17:50,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:17:50,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:17:50,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 737 transitions, 11937 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:50,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:17:50,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:17:50,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:17:52,089 INFO L124 PetriNetUnfolderBase]: 5372/8030 cut-off events. [2024-06-04 15:17:52,089 INFO L125 PetriNetUnfolderBase]: For 632653/632764 co-relation queries the response was YES. [2024-06-04 15:17:52,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80118 conditions, 8030 events. 5372/8030 cut-off events. For 632653/632764 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 45310 event pairs, 1165 based on Foata normal form. 16/8016 useless extension candidates. Maximal degree in co-relation 79989. Up to 7577 conditions per place. [2024-06-04 15:17:52,196 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 661 selfloop transitions, 59 changer transitions 0/756 dead transitions. [2024-06-04 15:17:52,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 756 transitions, 13681 flow [2024-06-04 15:17:52,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:17:52,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:17:52,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-04 15:17:52,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-04 15:17:52,197 INFO L175 Difference]: Start difference. First operand has 286 places, 737 transitions, 11937 flow. Second operand 6 states and 116 transitions. [2024-06-04 15:17:52,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 756 transitions, 13681 flow [2024-06-04 15:17:53,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 756 transitions, 13360 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-04 15:17:53,128 INFO L231 Difference]: Finished difference. Result has 286 places, 742 transitions, 11898 flow [2024-06-04 15:17:53,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11620, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=683, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11898, PETRI_PLACES=286, PETRI_TRANSITIONS=742} [2024-06-04 15:17:53,129 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 242 predicate places. [2024-06-04 15:17:53,129 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 742 transitions, 11898 flow [2024-06-04 15:17:53,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:53,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:17:53,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:17:53,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 15:17:53,129 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:17:53,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:17:53,129 INFO L85 PathProgramCache]: Analyzing trace with hash 518601857, now seen corresponding path program 3 times [2024-06-04 15:17:53,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:17:53,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973804460] [2024-06-04 15:17:53,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:17:53,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:17:53,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:17:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:17:54,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:17:54,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973804460] [2024-06-04 15:17:54,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973804460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:17:54,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:17:54,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:17:54,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015163324] [2024-06-04 15:17:54,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:17:54,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:17:54,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:17:54,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:17:54,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:17:54,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:17:54,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 742 transitions, 11898 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:54,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:17:54,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:17:54,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:17:56,240 INFO L124 PetriNetUnfolderBase]: 5636/8358 cut-off events. [2024-06-04 15:17:56,240 INFO L125 PetriNetUnfolderBase]: For 655024/655024 co-relation queries the response was YES. [2024-06-04 15:17:56,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82364 conditions, 8358 events. 5636/8358 cut-off events. For 655024/655024 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 46531 event pairs, 1640 based on Foata normal form. 6/8364 useless extension candidates. Maximal degree in co-relation 82234. Up to 8013 conditions per place. [2024-06-04 15:17:56,356 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 729 selfloop transitions, 39 changer transitions 0/773 dead transitions. [2024-06-04 15:17:56,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 773 transitions, 13858 flow [2024-06-04 15:17:56,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:17:56,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:17:56,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-04 15:17:56,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-04 15:17:56,357 INFO L175 Difference]: Start difference. First operand has 286 places, 742 transitions, 11898 flow. Second operand 9 states and 161 transitions. [2024-06-04 15:17:56,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 773 transitions, 13858 flow [2024-06-04 15:17:57,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 773 transitions, 13749 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-04 15:17:57,345 INFO L231 Difference]: Finished difference. Result has 291 places, 745 transitions, 12014 flow [2024-06-04 15:17:57,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11791, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=703, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12014, PETRI_PLACES=291, PETRI_TRANSITIONS=745} [2024-06-04 15:17:57,346 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 247 predicate places. [2024-06-04 15:17:57,346 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 745 transitions, 12014 flow [2024-06-04 15:17:57,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:57,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:17:57,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:17:57,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 15:17:57,346 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:17:57,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:17:57,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1767607745, now seen corresponding path program 4 times [2024-06-04 15:17:57,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:17:57,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076470595] [2024-06-04 15:17:57,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:17:57,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:17:57,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:17:58,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:17:58,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:17:58,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076470595] [2024-06-04 15:17:58,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076470595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:17:58,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:17:58,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:17:58,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187499997] [2024-06-04 15:17:58,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:17:58,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:17:58,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:17:58,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:17:58,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:17:58,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:17:58,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 745 transitions, 12014 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:58,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:17:58,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:17:58,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:18:00,324 INFO L124 PetriNetUnfolderBase]: 5663/8401 cut-off events. [2024-06-04 15:18:00,325 INFO L125 PetriNetUnfolderBase]: For 662420/662420 co-relation queries the response was YES. [2024-06-04 15:18:00,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83094 conditions, 8401 events. 5663/8401 cut-off events. For 662420/662420 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 46883 event pairs, 1632 based on Foata normal form. 6/8407 useless extension candidates. Maximal degree in co-relation 82964. Up to 7987 conditions per place. [2024-06-04 15:18:00,436 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 727 selfloop transitions, 48 changer transitions 0/780 dead transitions. [2024-06-04 15:18:00,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 780 transitions, 14118 flow [2024-06-04 15:18:00,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:18:00,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:18:00,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-04 15:18:00,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-04 15:18:00,437 INFO L175 Difference]: Start difference. First operand has 291 places, 745 transitions, 12014 flow. Second operand 8 states and 152 transitions. [2024-06-04 15:18:00,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 780 transitions, 14118 flow [2024-06-04 15:18:01,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 780 transitions, 13925 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-04 15:18:01,415 INFO L231 Difference]: Finished difference. Result has 292 places, 748 transitions, 12067 flow [2024-06-04 15:18:01,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11821, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12067, PETRI_PLACES=292, PETRI_TRANSITIONS=748} [2024-06-04 15:18:01,416 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 248 predicate places. [2024-06-04 15:18:01,416 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 748 transitions, 12067 flow [2024-06-04 15:18:01,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:01,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:18:01,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:18:01,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 15:18:01,416 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:18:01,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:18:01,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1199314527, now seen corresponding path program 11 times [2024-06-04 15:18:01,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:18:01,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830584931] [2024-06-04 15:18:01,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:18:01,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:18:01,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:18:02,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:18:02,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:18:02,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830584931] [2024-06-04 15:18:02,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830584931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:18:02,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:18:02,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:18:02,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661146579] [2024-06-04 15:18:02,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:18:02,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:18:02,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:18:02,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:18:02,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:18:02,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:18:02,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 748 transitions, 12067 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:02,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:18:02,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:18:02,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:18:04,335 INFO L124 PetriNetUnfolderBase]: 5699/8453 cut-off events. [2024-06-04 15:18:04,335 INFO L125 PetriNetUnfolderBase]: For 686373/686373 co-relation queries the response was YES. [2024-06-04 15:18:04,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84189 conditions, 8453 events. 5699/8453 cut-off events. For 686373/686373 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 47146 event pairs, 1631 based on Foata normal form. 6/8459 useless extension candidates. Maximal degree in co-relation 84058. Up to 8091 conditions per place. [2024-06-04 15:18:04,445 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 743 selfloop transitions, 38 changer transitions 0/786 dead transitions. [2024-06-04 15:18:04,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 786 transitions, 14143 flow [2024-06-04 15:18:04,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:18:04,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:18:04,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-04 15:18:04,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-04 15:18:04,446 INFO L175 Difference]: Start difference. First operand has 292 places, 748 transitions, 12067 flow. Second operand 9 states and 168 transitions. [2024-06-04 15:18:04,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 786 transitions, 14143 flow [2024-06-04 15:18:05,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 786 transitions, 13925 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-04 15:18:05,431 INFO L231 Difference]: Finished difference. Result has 295 places, 752 transitions, 12112 flow [2024-06-04 15:18:05,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11849, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=710, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12112, PETRI_PLACES=295, PETRI_TRANSITIONS=752} [2024-06-04 15:18:05,432 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 251 predicate places. [2024-06-04 15:18:05,432 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 752 transitions, 12112 flow [2024-06-04 15:18:05,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:05,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:18:05,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:18:05,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 15:18:05,432 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:18:05,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:18:05,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1191033621, now seen corresponding path program 1 times [2024-06-04 15:18:05,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:18:05,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429834604] [2024-06-04 15:18:05,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:18:05,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:18:05,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:18:06,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:18:06,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:18:06,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429834604] [2024-06-04 15:18:06,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429834604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:18:06,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:18:06,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:18:06,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567883354] [2024-06-04 15:18:06,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:18:06,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:18:06,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:18:06,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:18:06,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:18:06,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:18:06,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 752 transitions, 12112 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:06,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:18:06,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:18:06,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:18:08,294 INFO L124 PetriNetUnfolderBase]: 5702/8457 cut-off events. [2024-06-04 15:18:08,294 INFO L125 PetriNetUnfolderBase]: For 697854/697854 co-relation queries the response was YES. [2024-06-04 15:18:08,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84521 conditions, 8457 events. 5702/8457 cut-off events. For 697854/697854 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 47163 event pairs, 1644 based on Foata normal form. 3/8460 useless extension candidates. Maximal degree in co-relation 84389. Up to 8089 conditions per place. [2024-06-04 15:18:08,404 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 733 selfloop transitions, 48 changer transitions 0/786 dead transitions. [2024-06-04 15:18:08,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 786 transitions, 14162 flow [2024-06-04 15:18:08,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:18:08,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:18:08,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-04 15:18:08,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-04 15:18:08,405 INFO L175 Difference]: Start difference. First operand has 295 places, 752 transitions, 12112 flow. Second operand 9 states and 162 transitions. [2024-06-04 15:18:08,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 786 transitions, 14162 flow [2024-06-04 15:18:09,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 786 transitions, 13933 flow, removed 80 selfloop flow, removed 7 redundant places. [2024-06-04 15:18:09,578 INFO L231 Difference]: Finished difference. Result has 297 places, 756 transitions, 12162 flow [2024-06-04 15:18:09,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11883, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=704, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12162, PETRI_PLACES=297, PETRI_TRANSITIONS=756} [2024-06-04 15:18:09,578 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-04 15:18:09,578 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 756 transitions, 12162 flow [2024-06-04 15:18:09,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:09,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:18:09,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:18:09,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 15:18:09,579 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:18:09,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:18:09,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1427215677, now seen corresponding path program 12 times [2024-06-04 15:18:09,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:18:09,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300371853] [2024-06-04 15:18:09,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:18:09,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:18:09,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:18:10,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:18:10,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:18:10,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300371853] [2024-06-04 15:18:10,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300371853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:18:10,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:18:10,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:18:10,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125444860] [2024-06-04 15:18:10,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:18:10,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:18:10,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:18:10,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:18:10,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:18:10,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:18:10,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 756 transitions, 12162 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:10,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:18:10,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:18:10,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:18:12,483 INFO L124 PetriNetUnfolderBase]: 5738/8509 cut-off events. [2024-06-04 15:18:12,483 INFO L125 PetriNetUnfolderBase]: For 726251/726251 co-relation queries the response was YES. [2024-06-04 15:18:12,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85297 conditions, 8509 events. 5738/8509 cut-off events. For 726251/726251 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 47521 event pairs, 1616 based on Foata normal form. 6/8515 useless extension candidates. Maximal degree in co-relation 85164. Up to 7788 conditions per place. [2024-06-04 15:18:12,600 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 707 selfloop transitions, 93 changer transitions 0/805 dead transitions. [2024-06-04 15:18:12,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 805 transitions, 14551 flow [2024-06-04 15:18:12,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:18:12,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:18:12,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-04 15:18:12,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-04 15:18:12,602 INFO L175 Difference]: Start difference. First operand has 297 places, 756 transitions, 12162 flow. Second operand 9 states and 174 transitions. [2024-06-04 15:18:12,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 805 transitions, 14551 flow [2024-06-04 15:18:13,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 805 transitions, 14352 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-04 15:18:13,710 INFO L231 Difference]: Finished difference. Result has 299 places, 760 transitions, 12346 flow [2024-06-04 15:18:13,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11963, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12346, PETRI_PLACES=299, PETRI_TRANSITIONS=760} [2024-06-04 15:18:13,711 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 255 predicate places. [2024-06-04 15:18:13,711 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 760 transitions, 12346 flow [2024-06-04 15:18:13,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:13,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:18:13,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:18:13,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 15:18:13,712 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:18:13,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:18:13,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1767423171, now seen corresponding path program 13 times [2024-06-04 15:18:13,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:18:13,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960343236] [2024-06-04 15:18:13,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:18:13,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:18:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:18:14,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:18:14,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:18:14,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960343236] [2024-06-04 15:18:14,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960343236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:18:14,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:18:14,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:18:14,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434914920] [2024-06-04 15:18:14,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:18:14,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:18:14,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:18:14,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:18:14,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:18:14,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:18:14,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 760 transitions, 12346 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:14,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:18:14,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:18:14,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:18:16,835 INFO L124 PetriNetUnfolderBase]: 5765/8548 cut-off events. [2024-06-04 15:18:16,836 INFO L125 PetriNetUnfolderBase]: For 749673/749673 co-relation queries the response was YES. [2024-06-04 15:18:16,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86757 conditions, 8548 events. 5765/8548 cut-off events. For 749673/749673 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 47693 event pairs, 1616 based on Foata normal form. 6/8554 useless extension candidates. Maximal degree in co-relation 86623. Up to 7740 conditions per place. [2024-06-04 15:18:16,955 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 716 selfloop transitions, 94 changer transitions 0/815 dead transitions. [2024-06-04 15:18:16,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 815 transitions, 15087 flow [2024-06-04 15:18:16,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:18:16,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:18:16,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-04 15:18:16,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-04 15:18:16,956 INFO L175 Difference]: Start difference. First operand has 299 places, 760 transitions, 12346 flow. Second operand 10 states and 193 transitions. [2024-06-04 15:18:16,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 815 transitions, 15087 flow [2024-06-04 15:18:18,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 815 transitions, 14667 flow, removed 90 selfloop flow, removed 7 redundant places. [2024-06-04 15:18:18,346 INFO L231 Difference]: Finished difference. Result has 303 places, 768 transitions, 12489 flow [2024-06-04 15:18:18,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11926, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12489, PETRI_PLACES=303, PETRI_TRANSITIONS=768} [2024-06-04 15:18:18,347 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 259 predicate places. [2024-06-04 15:18:18,347 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 768 transitions, 12489 flow [2024-06-04 15:18:18,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:18,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:18:18,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:18:18,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 15:18:18,347 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)] === [2024-06-04 15:18:18,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:18:18,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1427393431, now seen corresponding path program 10 times [2024-06-04 15:18:18,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:18:18,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008553354] [2024-06-04 15:18:18,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:18:18,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:18:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:18:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:18:19,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:18:19,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008553354] [2024-06-04 15:18:19,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008553354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:18:19,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:18:19,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:18:19,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700907083] [2024-06-04 15:18:19,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:18:19,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:18:19,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:18:19,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:18:19,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:18:19,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:18:19,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 768 transitions, 12489 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:19,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:18:19,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:18:19,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:18:21,340 INFO L124 PetriNetUnfolderBase]: 5757/8536 cut-off events. [2024-06-04 15:18:21,340 INFO L125 PetriNetUnfolderBase]: For 767178/767178 co-relation queries the response was YES. [2024-06-04 15:18:21,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86838 conditions, 8536 events. 5757/8536 cut-off events. For 767178/767178 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 47673 event pairs, 1647 based on Foata normal form. 4/8540 useless extension candidates. Maximal degree in co-relation 86702. Up to 8270 conditions per place. [2024-06-04 15:18:21,459 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 766 selfloop transitions, 26 changer transitions 0/797 dead transitions. [2024-06-04 15:18:21,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 797 transitions, 14396 flow [2024-06-04 15:18:21,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:18:21,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:18:21,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-04 15:18:21,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-04 15:18:21,461 INFO L175 Difference]: Start difference. First operand has 303 places, 768 transitions, 12489 flow. Second operand 9 states and 157 transitions. [2024-06-04 15:18:21,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 797 transitions, 14396 flow [2024-06-04 15:18:22,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 797 transitions, 14042 flow, removed 129 selfloop flow, removed 6 redundant places. [2024-06-04 15:18:22,720 INFO L231 Difference]: Finished difference. Result has 306 places, 770 transitions, 12350 flow [2024-06-04 15:18:22,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12135, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=768, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=742, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12350, PETRI_PLACES=306, PETRI_TRANSITIONS=770} [2024-06-04 15:18:22,721 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 262 predicate places. [2024-06-04 15:18:22,721 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 770 transitions, 12350 flow [2024-06-04 15:18:22,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:22,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:18:22,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:18:22,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 15:18:22,722 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)] === [2024-06-04 15:18:22,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:18:22,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1190736703, now seen corresponding path program 5 times [2024-06-04 15:18:22,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:18:22,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303871766] [2024-06-04 15:18:22,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:18:22,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:18:22,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:18:23,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:18:23,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:18:23,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303871766] [2024-06-04 15:18:23,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303871766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:18:23,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:18:23,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:18:23,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40810588] [2024-06-04 15:18:23,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:18:23,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:18:23,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:18:23,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:18:23,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:18:23,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:18:23,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 770 transitions, 12350 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:23,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:18:23,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:18:23,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:18:25,707 INFO L124 PetriNetUnfolderBase]: 5761/8542 cut-off events. [2024-06-04 15:18:25,708 INFO L125 PetriNetUnfolderBase]: For 779908/779908 co-relation queries the response was YES. [2024-06-04 15:18:25,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86411 conditions, 8542 events. 5761/8542 cut-off events. For 779908/779908 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 47776 event pairs, 1622 based on Foata normal form. 6/8548 useless extension candidates. Maximal degree in co-relation 86273. Up to 8225 conditions per place. [2024-06-04 15:18:25,826 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 763 selfloop transitions, 30 changer transitions 0/798 dead transitions. [2024-06-04 15:18:25,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 798 transitions, 14358 flow [2024-06-04 15:18:25,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:18:25,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:18:25,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-04 15:18:25,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-04 15:18:25,827 INFO L175 Difference]: Start difference. First operand has 306 places, 770 transitions, 12350 flow. Second operand 9 states and 160 transitions. [2024-06-04 15:18:25,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 798 transitions, 14358 flow [2024-06-04 15:18:27,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 798 transitions, 14161 flow, removed 74 selfloop flow, removed 7 redundant places. [2024-06-04 15:18:27,052 INFO L231 Difference]: Finished difference. Result has 308 places, 773 transitions, 12383 flow [2024-06-04 15:18:27,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12153, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=740, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12383, PETRI_PLACES=308, PETRI_TRANSITIONS=773} [2024-06-04 15:18:27,052 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 264 predicate places. [2024-06-04 15:18:27,052 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 773 transitions, 12383 flow [2024-06-04 15:18:27,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:27,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:18:27,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:18:27,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 15:18:27,053 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:18:27,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:18:27,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1436805487, now seen corresponding path program 3 times [2024-06-04 15:18:27,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:18:27,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563583293] [2024-06-04 15:18:27,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:18:27,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:18:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:18:27,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:18:27,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:18:27,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563583293] [2024-06-04 15:18:27,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563583293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:18:27,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:18:27,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:18:27,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352003336] [2024-06-04 15:18:27,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:18:27,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:18:27,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:18:27,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:18:27,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:18:27,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:18:27,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 773 transitions, 12383 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:27,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:18:27,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:18:27,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:18:29,581 INFO L124 PetriNetUnfolderBase]: 5501/8237 cut-off events. [2024-06-04 15:18:29,581 INFO L125 PetriNetUnfolderBase]: For 797697/797815 co-relation queries the response was YES. [2024-06-04 15:18:29,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84146 conditions, 8237 events. 5501/8237 cut-off events. For 797697/797815 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 47023 event pairs, 1573 based on Foata normal form. 23/8224 useless extension candidates. Maximal degree in co-relation 84007. Up to 7826 conditions per place. [2024-06-04 15:18:29,706 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 728 selfloop transitions, 14 changer transitions 0/781 dead transitions. [2024-06-04 15:18:29,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 781 transitions, 13905 flow [2024-06-04 15:18:29,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:18:29,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:18:29,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-04 15:18:29,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-04 15:18:29,709 INFO L175 Difference]: Start difference. First operand has 308 places, 773 transitions, 12383 flow. Second operand 6 states and 107 transitions. [2024-06-04 15:18:29,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 781 transitions, 13905 flow [2024-06-04 15:18:30,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 781 transitions, 13677 flow, removed 86 selfloop flow, removed 7 redundant places. [2024-06-04 15:18:30,905 INFO L231 Difference]: Finished difference. Result has 307 places, 773 transitions, 12191 flow [2024-06-04 15:18:30,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12155, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=759, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12191, PETRI_PLACES=307, PETRI_TRANSITIONS=773} [2024-06-04 15:18:30,906 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-04 15:18:30,906 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 773 transitions, 12191 flow [2024-06-04 15:18:30,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:30,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:18:30,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:18:30,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 15:18:30,907 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:18:30,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:18:30,907 INFO L85 PathProgramCache]: Analyzing trace with hash 944014669, now seen corresponding path program 1 times [2024-06-04 15:18:30,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:18:30,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998286585] [2024-06-04 15:18:30,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:18:30,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:18:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:18:31,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:18:31,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:18:31,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998286585] [2024-06-04 15:18:31,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998286585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:18:31,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:18:31,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:18:31,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621114498] [2024-06-04 15:18:31,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:18:31,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:18:31,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:18:31,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:18:31,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:18:31,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:18:31,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 773 transitions, 12191 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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) [2024-06-04 15:18:31,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:18:31,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:18:31,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:18:33,530 INFO L124 PetriNetUnfolderBase]: 5754/8533 cut-off events. [2024-06-04 15:18:33,530 INFO L125 PetriNetUnfolderBase]: For 798353/798353 co-relation queries the response was YES. [2024-06-04 15:18:33,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86156 conditions, 8533 events. 5754/8533 cut-off events. For 798353/798353 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 47705 event pairs, 1647 based on Foata normal form. 3/8536 useless extension candidates. Maximal degree in co-relation 86016. Up to 8276 conditions per place. [2024-06-04 15:18:33,655 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 758 selfloop transitions, 25 changer transitions 0/788 dead transitions. [2024-06-04 15:18:33,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 788 transitions, 13987 flow [2024-06-04 15:18:33,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:18:33,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:18:33,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-04 15:18:33,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-04 15:18:33,655 INFO L175 Difference]: Start difference. First operand has 307 places, 773 transitions, 12191 flow. Second operand 6 states and 112 transitions. [2024-06-04 15:18:33,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 788 transitions, 13987 flow [2024-06-04 15:18:34,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 788 transitions, 13927 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-04 15:18:35,000 INFO L231 Difference]: Finished difference. Result has 308 places, 776 transitions, 12240 flow [2024-06-04 15:18:35,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12131, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=750, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12240, PETRI_PLACES=308, PETRI_TRANSITIONS=776} [2024-06-04 15:18:35,001 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 264 predicate places. [2024-06-04 15:18:35,001 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 776 transitions, 12240 flow [2024-06-04 15:18:35,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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) [2024-06-04 15:18:35,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:18:35,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:18:35,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 15:18:35,002 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:18:35,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:18:35,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1436811439, now seen corresponding path program 2 times [2024-06-04 15:18:35,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:18:35,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757279314] [2024-06-04 15:18:35,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:18:35,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:18:35,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:18:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:18:35,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:18:35,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757279314] [2024-06-04 15:18:35,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757279314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:18:35,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:18:35,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:18:35,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213396126] [2024-06-04 15:18:35,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:18:35,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:18:35,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:18:35,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:18:35,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:18:35,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:18:35,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 776 transitions, 12240 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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) [2024-06-04 15:18:35,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:18:35,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:18:35,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:18:37,645 INFO L124 PetriNetUnfolderBase]: 5722/8486 cut-off events. [2024-06-04 15:18:37,646 INFO L125 PetriNetUnfolderBase]: For 813750/813752 co-relation queries the response was YES. [2024-06-04 15:18:37,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86180 conditions, 8486 events. 5722/8486 cut-off events. For 813750/813752 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 47371 event pairs, 1658 based on Foata normal form. 1/8487 useless extension candidates. Maximal degree in co-relation 86039. Up to 8230 conditions per place. [2024-06-04 15:18:37,781 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 753 selfloop transitions, 26 changer transitions 0/784 dead transitions. [2024-06-04 15:18:37,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 784 transitions, 13836 flow [2024-06-04 15:18:37,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:18:37,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:18:37,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-04 15:18:37,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42248062015503873 [2024-06-04 15:18:37,781 INFO L175 Difference]: Start difference. First operand has 308 places, 776 transitions, 12240 flow. Second operand 6 states and 109 transitions. [2024-06-04 15:18:37,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 784 transitions, 13836 flow [2024-06-04 15:18:39,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 784 transitions, 13782 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-04 15:18:39,168 INFO L231 Difference]: Finished difference. Result has 310 places, 776 transitions, 12244 flow [2024-06-04 15:18:39,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12186, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=750, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12244, PETRI_PLACES=310, PETRI_TRANSITIONS=776} [2024-06-04 15:18:39,168 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 266 predicate places. [2024-06-04 15:18:39,168 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 776 transitions, 12244 flow [2024-06-04 15:18:39,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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) [2024-06-04 15:18:39,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:18:39,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:18:39,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 15:18:39,169 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:18:39,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:18:39,169 INFO L85 PathProgramCache]: Analyzing trace with hash 949736525, now seen corresponding path program 1 times [2024-06-04 15:18:39,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:18:39,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871915965] [2024-06-04 15:18:39,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:18:39,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:18:39,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:18:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:18:39,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:18:39,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871915965] [2024-06-04 15:18:39,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871915965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:18:39,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:18:39,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:18:39,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115345094] [2024-06-04 15:18:39,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:18:39,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:18:39,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:18:39,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:18:39,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:18:39,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:18:39,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 776 transitions, 12244 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-04 15:18:39,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:18:39,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:18:39,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:18:41,930 INFO L124 PetriNetUnfolderBase]: 5622/8339 cut-off events. [2024-06-04 15:18:41,930 INFO L125 PetriNetUnfolderBase]: For 854080/854193 co-relation queries the response was YES. [2024-06-04 15:18:42,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85590 conditions, 8339 events. 5622/8339 cut-off events. For 854080/854193 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 46725 event pairs, 1653 based on Foata normal form. 24/8327 useless extension candidates. Maximal degree in co-relation 85448. Up to 8029 conditions per place. [2024-06-04 15:18:42,045 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 738 selfloop transitions, 15 changer transitions 0/790 dead transitions. [2024-06-04 15:18:42,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 790 transitions, 13826 flow [2024-06-04 15:18:42,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:18:42,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:18:42,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-04 15:18:42,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-04 15:18:42,045 INFO L175 Difference]: Start difference. First operand has 310 places, 776 transitions, 12244 flow. Second operand 7 states and 117 transitions. [2024-06-04 15:18:42,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 790 transitions, 13826 flow [2024-06-04 15:18:43,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 790 transitions, 13758 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 15:18:43,370 INFO L231 Difference]: Finished difference. Result has 312 places, 779 transitions, 12250 flow [2024-06-04 15:18:43,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12176, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=761, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12250, PETRI_PLACES=312, PETRI_TRANSITIONS=779} [2024-06-04 15:18:43,371 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 268 predicate places. [2024-06-04 15:18:43,371 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 779 transitions, 12250 flow [2024-06-04 15:18:43,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-04 15:18:43,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:18:43,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:18:43,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 15:18:43,371 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:18:43,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:18:43,371 INFO L85 PathProgramCache]: Analyzing trace with hash -705293403, now seen corresponding path program 1 times [2024-06-04 15:18:43,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:18:43,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183606707] [2024-06-04 15:18:43,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:18:43,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:18:43,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:18:44,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:18:44,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:18:44,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183606707] [2024-06-04 15:18:44,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183606707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:18:44,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:18:44,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:18:44,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25677621] [2024-06-04 15:18:44,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:18:44,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:18:44,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:18:44,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:18:44,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:18:44,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:18:44,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 779 transitions, 12250 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:44,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:18:44,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:18:44,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:18:46,681 INFO L124 PetriNetUnfolderBase]: 6331/9385 cut-off events. [2024-06-04 15:18:46,682 INFO L125 PetriNetUnfolderBase]: For 1113157/1113180 co-relation queries the response was YES. [2024-06-04 15:18:46,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104640 conditions, 9385 events. 6331/9385 cut-off events. For 1113157/1113180 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 53544 event pairs, 1109 based on Foata normal form. 30/9383 useless extension candidates. Maximal degree in co-relation 104497. Up to 5620 conditions per place. [2024-06-04 15:18:46,828 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 604 selfloop transitions, 248 changer transitions 0/857 dead transitions. [2024-06-04 15:18:46,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 857 transitions, 15884 flow [2024-06-04 15:18:46,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:18:46,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:18:46,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-04 15:18:46,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-04 15:18:46,830 INFO L175 Difference]: Start difference. First operand has 312 places, 779 transitions, 12250 flow. Second operand 11 states and 231 transitions. [2024-06-04 15:18:46,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 857 transitions, 15884 flow [2024-06-04 15:18:48,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 857 transitions, 15832 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-04 15:18:48,649 INFO L231 Difference]: Finished difference. Result has 321 places, 787 transitions, 13216 flow [2024-06-04 15:18:48,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12198, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=779, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13216, PETRI_PLACES=321, PETRI_TRANSITIONS=787} [2024-06-04 15:18:48,650 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 277 predicate places. [2024-06-04 15:18:48,650 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 787 transitions, 13216 flow [2024-06-04 15:18:48,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:48,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:18:48,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:18:48,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 15:18:48,651 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:18:48,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:18:48,651 INFO L85 PathProgramCache]: Analyzing trace with hash -635781003, now seen corresponding path program 2 times [2024-06-04 15:18:48,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:18:48,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442880963] [2024-06-04 15:18:48,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:18:48,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:18:48,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:18:49,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:18:49,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:18:49,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442880963] [2024-06-04 15:18:49,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442880963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:18:49,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:18:49,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:18:49,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349352258] [2024-06-04 15:18:49,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:18:49,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:18:49,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:18:49,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:18:49,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:18:49,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:18:49,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 787 transitions, 13216 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:49,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:18:49,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:18:49,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:18:52,545 INFO L124 PetriNetUnfolderBase]: 7153/10705 cut-off events. [2024-06-04 15:18:52,546 INFO L125 PetriNetUnfolderBase]: For 1482721/1482736 co-relation queries the response was YES. [2024-06-04 15:18:52,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130649 conditions, 10705 events. 7153/10705 cut-off events. For 1482721/1482736 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 63585 event pairs, 1639 based on Foata normal form. 46/10735 useless extension candidates. Maximal degree in co-relation 130502. Up to 7239 conditions per place. [2024-06-04 15:18:52,724 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 618 selfloop transitions, 264 changer transitions 0/887 dead transitions. [2024-06-04 15:18:52,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 887 transitions, 17528 flow [2024-06-04 15:18:52,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 15:18:52,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 15:18:52,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 248 transitions. [2024-06-04 15:18:52,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2024-06-04 15:18:52,725 INFO L175 Difference]: Start difference. First operand has 321 places, 787 transitions, 13216 flow. Second operand 12 states and 248 transitions. [2024-06-04 15:18:52,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 887 transitions, 17528 flow [2024-06-04 15:18:55,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 887 transitions, 16934 flow, removed 165 selfloop flow, removed 5 redundant places. [2024-06-04 15:18:55,263 INFO L231 Difference]: Finished difference. Result has 330 places, 801 transitions, 14047 flow [2024-06-04 15:18:55,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12796, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=787, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14047, PETRI_PLACES=330, PETRI_TRANSITIONS=801} [2024-06-04 15:18:55,263 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 286 predicate places. [2024-06-04 15:18:55,264 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 801 transitions, 14047 flow [2024-06-04 15:18:55,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:55,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:18:55,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:18:55,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 15:18:55,264 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:18:55,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:18:55,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1014784071, now seen corresponding path program 3 times [2024-06-04 15:18:55,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:18:55,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464396753] [2024-06-04 15:18:55,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:18:55,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:18:55,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:18:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:18:56,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:18:56,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464396753] [2024-06-04 15:18:56,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464396753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:18:56,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:18:56,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:18:56,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191870549] [2024-06-04 15:18:56,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:18:56,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:18:56,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:18:56,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:18:56,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:18:56,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:18:56,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 801 transitions, 14047 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:56,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:18:56,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:18:56,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:00,022 INFO L124 PetriNetUnfolderBase]: 7498/11262 cut-off events. [2024-06-04 15:19:00,022 INFO L125 PetriNetUnfolderBase]: For 1665412/1665422 co-relation queries the response was YES. [2024-06-04 15:19:00,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141291 conditions, 11262 events. 7498/11262 cut-off events. For 1665412/1665422 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 68063 event pairs, 2009 based on Foata normal form. 42/11288 useless extension candidates. Maximal degree in co-relation 141140. Up to 8478 conditions per place. [2024-06-04 15:19:00,270 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 629 selfloop transitions, 252 changer transitions 0/886 dead transitions. [2024-06-04 15:19:00,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 886 transitions, 17857 flow [2024-06-04 15:19:00,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 15:19:00,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 15:19:00,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 244 transitions. [2024-06-04 15:19:00,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2024-06-04 15:19:00,271 INFO L175 Difference]: Start difference. First operand has 330 places, 801 transitions, 14047 flow. Second operand 12 states and 244 transitions. [2024-06-04 15:19:00,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 886 transitions, 17857 flow [2024-06-04 15:19:03,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 886 transitions, 17417 flow, removed 77 selfloop flow, removed 7 redundant places. [2024-06-04 15:19:03,223 INFO L231 Difference]: Finished difference. Result has 336 places, 807 transitions, 14532 flow [2024-06-04 15:19:03,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13607, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=801, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14532, PETRI_PLACES=336, PETRI_TRANSITIONS=807} [2024-06-04 15:19:03,223 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 292 predicate places. [2024-06-04 15:19:03,224 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 807 transitions, 14532 flow [2024-06-04 15:19:03,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:03,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:03,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:19:03,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 15:19:03,224 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:19:03,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:03,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1014780351, now seen corresponding path program 4 times [2024-06-04 15:19:03,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:03,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549470253] [2024-06-04 15:19:03,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:03,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:03,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:04,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:04,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549470253] [2024-06-04 15:19:04,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549470253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:04,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:04,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:19:04,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301432670] [2024-06-04 15:19:04,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:04,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:19:04,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:04,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:19:04,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:19:04,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:19:04,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 807 transitions, 14532 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:04,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:04,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:19:04,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:07,879 INFO L124 PetriNetUnfolderBase]: 7486/11252 cut-off events. [2024-06-04 15:19:07,880 INFO L125 PetriNetUnfolderBase]: For 1644803/1644813 co-relation queries the response was YES. [2024-06-04 15:19:07,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139323 conditions, 11252 events. 7486/11252 cut-off events. For 1644803/1644813 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 67875 event pairs, 2050 based on Foata normal form. 50/11286 useless extension candidates. Maximal degree in co-relation 139169. Up to 9117 conditions per place. [2024-06-04 15:19:08,064 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 604 selfloop transitions, 272 changer transitions 0/881 dead transitions. [2024-06-04 15:19:08,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 881 transitions, 17755 flow [2024-06-04 15:19:08,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 15:19:08,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 15:19:08,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 241 transitions. [2024-06-04 15:19:08,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46705426356589147 [2024-06-04 15:19:08,066 INFO L175 Difference]: Start difference. First operand has 336 places, 807 transitions, 14532 flow. Second operand 12 states and 241 transitions. [2024-06-04 15:19:08,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 881 transitions, 17755 flow [2024-06-04 15:19:11,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 881 transitions, 17315 flow, removed 77 selfloop flow, removed 8 redundant places. [2024-06-04 15:19:11,472 INFO L231 Difference]: Finished difference. Result has 340 places, 809 transitions, 14824 flow [2024-06-04 15:19:11,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14092, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=807, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14824, PETRI_PLACES=340, PETRI_TRANSITIONS=809} [2024-06-04 15:19:11,473 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 296 predicate places. [2024-06-04 15:19:11,473 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 809 transitions, 14824 flow [2024-06-04 15:19:11,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:11,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:11,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:19:11,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 15:19:11,474 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:19:11,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:11,474 INFO L85 PathProgramCache]: Analyzing trace with hash -2125991879, now seen corresponding path program 5 times [2024-06-04 15:19:11,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:11,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97359031] [2024-06-04 15:19:11,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:11,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:12,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:12,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97359031] [2024-06-04 15:19:12,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97359031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:12,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:12,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:19:12,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627150425] [2024-06-04 15:19:12,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:12,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:19:12,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:12,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:19:12,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:19:12,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:19:12,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 809 transitions, 14824 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:12,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:12,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:19:12,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:17,068 INFO L124 PetriNetUnfolderBase]: 8907/13496 cut-off events. [2024-06-04 15:19:17,069 INFO L125 PetriNetUnfolderBase]: For 2135709/2135711 co-relation queries the response was YES. [2024-06-04 15:19:17,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178465 conditions, 13496 events. 8907/13496 cut-off events. For 2135709/2135711 co-relation queries the response was YES. Maximal size of possible extension queue 742. Compared 85838 event pairs, 2451 based on Foata normal form. 42/13538 useless extension candidates. Maximal degree in co-relation 178309. Up to 10104 conditions per place. [2024-06-04 15:19:17,274 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 701 selfloop transitions, 197 changer transitions 0/903 dead transitions. [2024-06-04 15:19:17,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 903 transitions, 18998 flow [2024-06-04 15:19:17,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 15:19:17,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 15:19:17,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 244 transitions. [2024-06-04 15:19:17,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2024-06-04 15:19:17,276 INFO L175 Difference]: Start difference. First operand has 340 places, 809 transitions, 14824 flow. Second operand 12 states and 244 transitions. [2024-06-04 15:19:17,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 903 transitions, 18998 flow [2024-06-04 15:19:21,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 903 transitions, 18334 flow, removed 94 selfloop flow, removed 9 redundant places. [2024-06-04 15:19:21,410 INFO L231 Difference]: Finished difference. Result has 345 places, 832 transitions, 15759 flow [2024-06-04 15:19:21,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14261, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=809, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15759, PETRI_PLACES=345, PETRI_TRANSITIONS=832} [2024-06-04 15:19:21,410 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 301 predicate places. [2024-06-04 15:19:21,411 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 832 transitions, 15759 flow [2024-06-04 15:19:21,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:21,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:21,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:19:21,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 15:19:21,411 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:19:21,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:21,412 INFO L85 PathProgramCache]: Analyzing trace with hash -2124114209, now seen corresponding path program 6 times [2024-06-04 15:19:21,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:21,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205998093] [2024-06-04 15:19:21,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:21,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:21,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:22,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:22,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:22,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205998093] [2024-06-04 15:19:22,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205998093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:22,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:22,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:19:22,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040446566] [2024-06-04 15:19:22,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:22,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:19:22,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:22,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:19:22,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:19:22,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:19:22,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 832 transitions, 15759 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:22,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:22,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:19:22,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:27,255 INFO L124 PetriNetUnfolderBase]: 9125/13862 cut-off events. [2024-06-04 15:19:27,255 INFO L125 PetriNetUnfolderBase]: For 2275794/2275796 co-relation queries the response was YES. [2024-06-04 15:19:27,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181654 conditions, 13862 events. 9125/13862 cut-off events. For 2275794/2275796 co-relation queries the response was YES. Maximal size of possible extension queue 763. Compared 89031 event pairs, 2832 based on Foata normal form. 74/13936 useless extension candidates. Maximal degree in co-relation 181495. Up to 12100 conditions per place. [2024-06-04 15:19:27,589 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 683 selfloop transitions, 206 changer transitions 0/894 dead transitions. [2024-06-04 15:19:27,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 894 transitions, 18517 flow [2024-06-04 15:19:27,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 15:19:27,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 15:19:27,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 252 transitions. [2024-06-04 15:19:27,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45080500894454384 [2024-06-04 15:19:27,591 INFO L175 Difference]: Start difference. First operand has 345 places, 832 transitions, 15759 flow. Second operand 13 states and 252 transitions. [2024-06-04 15:19:27,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 894 transitions, 18517 flow [2024-06-04 15:19:31,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 894 transitions, 18148 flow, removed 81 selfloop flow, removed 7 redundant places. [2024-06-04 15:19:31,885 INFO L231 Difference]: Finished difference. Result has 351 places, 836 transitions, 16089 flow [2024-06-04 15:19:31,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15390, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=16089, PETRI_PLACES=351, PETRI_TRANSITIONS=836} [2024-06-04 15:19:31,885 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 307 predicate places. [2024-06-04 15:19:31,885 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 836 transitions, 16089 flow [2024-06-04 15:19:31,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:31,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:31,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:19:31,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 15:19:31,886 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:19:31,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:31,886 INFO L85 PathProgramCache]: Analyzing trace with hash -856660751, now seen corresponding path program 7 times [2024-06-04 15:19:31,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:31,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835886414] [2024-06-04 15:19:31,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:31,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:32,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:32,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835886414] [2024-06-04 15:19:32,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835886414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:32,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:32,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:19:32,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037095074] [2024-06-04 15:19:32,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:32,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:19:32,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:32,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:19:32,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:19:33,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:19:33,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 836 transitions, 16089 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:33,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:33,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:19:33,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:37,591 INFO L124 PetriNetUnfolderBase]: 9175/13950 cut-off events. [2024-06-04 15:19:37,591 INFO L125 PetriNetUnfolderBase]: For 2182198/2182200 co-relation queries the response was YES. [2024-06-04 15:19:37,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180640 conditions, 13950 events. 9175/13950 cut-off events. For 2182198/2182200 co-relation queries the response was YES. Maximal size of possible extension queue 762. Compared 89565 event pairs, 2720 based on Foata normal form. 58/14008 useless extension candidates. Maximal degree in co-relation 180479. Up to 11116 conditions per place. [2024-06-04 15:19:37,816 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 710 selfloop transitions, 190 changer transitions 0/905 dead transitions. [2024-06-04 15:19:37,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 905 transitions, 19337 flow [2024-06-04 15:19:37,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 15:19:37,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 15:19:37,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 237 transitions. [2024-06-04 15:19:37,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-04 15:19:37,817 INFO L175 Difference]: Start difference. First operand has 351 places, 836 transitions, 16089 flow. Second operand 12 states and 237 transitions. [2024-06-04 15:19:37,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 905 transitions, 19337 flow [2024-06-04 15:19:43,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 905 transitions, 18830 flow, removed 54 selfloop flow, removed 12 redundant places. [2024-06-04 15:19:43,170 INFO L231 Difference]: Finished difference. Result has 352 places, 846 transitions, 16594 flow [2024-06-04 15:19:43,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15582, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=836, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=649, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=16594, PETRI_PLACES=352, PETRI_TRANSITIONS=846} [2024-06-04 15:19:43,171 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 308 predicate places. [2024-06-04 15:19:43,171 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 846 transitions, 16594 flow [2024-06-04 15:19:43,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:43,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:43,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:19:43,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 15:19:43,171 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:19:43,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:43,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1158357993, now seen corresponding path program 8 times [2024-06-04 15:19:43,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:43,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066400232] [2024-06-04 15:19:43,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:43,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:43,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:44,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:44,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:44,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066400232] [2024-06-04 15:19:44,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066400232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:44,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:44,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:19:44,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859097396] [2024-06-04 15:19:44,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:44,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:19:44,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:44,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:19:44,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:19:44,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:19:44,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 846 transitions, 16594 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:44,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:44,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:19:44,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:49,212 INFO L124 PetriNetUnfolderBase]: 9498/14465 cut-off events. [2024-06-04 15:19:49,212 INFO L125 PetriNetUnfolderBase]: For 2210340/2210346 co-relation queries the response was YES. [2024-06-04 15:19:49,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188420 conditions, 14465 events. 9498/14465 cut-off events. For 2210340/2210346 co-relation queries the response was YES. Maximal size of possible extension queue 793. Compared 93994 event pairs, 2989 based on Foata normal form. 30/14495 useless extension candidates. Maximal degree in co-relation 188257. Up to 12159 conditions per place. [2024-06-04 15:19:49,505 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 689 selfloop transitions, 248 changer transitions 0/942 dead transitions. [2024-06-04 15:19:49,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 942 transitions, 20601 flow [2024-06-04 15:19:49,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:19:49,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:19:49,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-04 15:19:49,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-04 15:19:49,506 INFO L175 Difference]: Start difference. First operand has 352 places, 846 transitions, 16594 flow. Second operand 11 states and 231 transitions. [2024-06-04 15:19:49,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 942 transitions, 20601 flow [2024-06-04 15:19:54,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 942 transitions, 20246 flow, removed 90 selfloop flow, removed 6 redundant places. [2024-06-04 15:19:54,280 INFO L231 Difference]: Finished difference. Result has 358 places, 850 transitions, 17047 flow [2024-06-04 15:19:54,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16239, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=846, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17047, PETRI_PLACES=358, PETRI_TRANSITIONS=850} [2024-06-04 15:19:54,281 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 314 predicate places. [2024-06-04 15:19:54,281 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 850 transitions, 17047 flow [2024-06-04 15:19:54,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:54,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:54,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:19:54,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 15:19:54,281 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:19:54,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:54,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1158354273, now seen corresponding path program 9 times [2024-06-04 15:19:54,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:54,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334718337] [2024-06-04 15:19:54,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:54,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:54,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:55,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:55,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:55,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334718337] [2024-06-04 15:19:55,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334718337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:55,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:55,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:19:55,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704166510] [2024-06-04 15:19:55,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:55,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:19:55,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:55,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:19:55,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:19:55,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-04 15:19:55,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 850 transitions, 17047 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:55,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:55,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-04 15:19:55,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand