./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix016.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/mix016.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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/mix016.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix016.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-cde23df-m [2024-06-14 12:03:02,198 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:03:02,259 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:03:02,263 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:03:02,263 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:03:02,290 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:03:02,291 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:03:02,291 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:03:02,292 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:03:02,295 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:03:02,295 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:03:02,295 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:03:02,296 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:03:02,297 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:03:02,297 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:03:02,297 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:03:02,297 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:03:02,298 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:03:02,298 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:03:02,298 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:03:02,298 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:03:02,299 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:03:02,299 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:03:02,299 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:03:02,299 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:03:02,299 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:03:02,300 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:03:02,300 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:03:02,300 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:03:02,301 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:03:02,301 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:03:02,302 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:03:02,302 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:03:02,302 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:03:02,302 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:03:02,302 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:03:02,302 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:03:02,303 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:03:02,303 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:03:02,303 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:03:02,303 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:03:02,303 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:03:02,304 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:03:02,304 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:03:02,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:03:02,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:03:02,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:03:02,551 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:03:02,551 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:03:02,552 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix016.oepc.i [2024-06-14 12:03:03,750 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:03:04,032 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:03:04,034 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix016.oepc.i [2024-06-14 12:03:04,054 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce7e07a64/3a3ab9cf43754ce58fba9ed8f7efc055/FLAG273d612ad [2024-06-14 12:03:04,064 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce7e07a64/3a3ab9cf43754ce58fba9ed8f7efc055 [2024-06-14 12:03:04,066 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:03:04,066 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:03:04,067 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix016.oepc.yml/witness.yml [2024-06-14 12:03:04,179 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:03:04,181 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:03:04,181 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:03:04,181 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:03:04,185 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:03:04,186 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:03:04" (1/2) ... [2024-06-14 12:03:04,186 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ebdf5dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:03:04, skipping insertion in model container [2024-06-14 12:03:04,186 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:03:04" (1/2) ... [2024-06-14 12:03:04,187 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6aa7641b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:03:04, skipping insertion in model container [2024-06-14 12:03:04,188 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:03:04" (2/2) ... [2024-06-14 12:03:04,188 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ebdf5dd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:03:04, skipping insertion in model container [2024-06-14 12:03:04,189 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:03:04" (2/2) ... [2024-06-14 12:03:04,189 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:03:04,288 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:03:04,289 INFO L97 edCorrectnessWitness]: Location invariant before [L843-L843] (((((((((((((((((((! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0) [2024-06-14 12:03:04,289 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] (((((((((((((((((((! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0) [2024-06-14 12:03:04,290 INFO L97 edCorrectnessWitness]: Location invariant before [L845-L845] (((((((((((((((((((! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0) [2024-06-14 12:03:04,290 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:03:04,290 INFO L106 edCorrectnessWitness]: ghost_update [L841-L841] multithreaded = 1; [2024-06-14 12:03:04,326 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:03:04,624 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:03:04,635 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:03:04,772 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:03:04,810 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:03:04,811 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:03:04 WrapperNode [2024-06-14 12:03:04,811 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:03:04,812 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:03:04,812 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:03:04,812 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:03:04,819 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:03:04" (1/1) ... [2024-06-14 12:03:04,833 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:03:04" (1/1) ... [2024-06-14 12:03:04,859 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 127 [2024-06-14 12:03:04,860 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:03:04,861 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:03:04,861 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:03:04,861 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:03:04,870 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:03:04" (1/1) ... [2024-06-14 12:03:04,870 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:03:04" (1/1) ... [2024-06-14 12:03:04,873 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:03:04" (1/1) ... [2024-06-14 12:03:04,891 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]. [2024-06-14 12:03:04,892 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:03:04" (1/1) ... [2024-06-14 12:03:04,892 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:03:04" (1/1) ... [2024-06-14 12:03:04,899 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:03:04" (1/1) ... [2024-06-14 12:03:04,901 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:03:04" (1/1) ... [2024-06-14 12:03:04,903 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:03:04" (1/1) ... [2024-06-14 12:03:04,904 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:03:04" (1/1) ... [2024-06-14 12:03:04,906 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:03:04,907 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:03:04,907 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:03:04,907 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:03:04,908 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:03:04" (1/1) ... [2024-06-14 12:03:04,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:03:04,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:03:04,942 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) [2024-06-14 12:03:04,945 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 [2024-06-14 12:03:04,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:03:04,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:03:04,980 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:03:04,980 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:03:04,981 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:03:04,981 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:03:04,981 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:03:04,981 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:03:04,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:03:04,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:03:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:03:04,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:03:04,983 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:03:05,082 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:03:05,094 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:03:05,467 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:03:05,468 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:03:05,594 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:03:05,594 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:03:05,595 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:03:05 BoogieIcfgContainer [2024-06-14 12:03:05,595 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:03:05,597 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:03:05,597 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:03:05,599 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:03:05,600 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:03:04" (1/4) ... [2024-06-14 12:03:05,601 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cd4e207 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:03:05, skipping insertion in model container [2024-06-14 12:03:05,601 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:03:04" (2/4) ... [2024-06-14 12:03:05,601 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cd4e207 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:03:05, skipping insertion in model container [2024-06-14 12:03:05,602 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:03:04" (3/4) ... [2024-06-14 12:03:05,602 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cd4e207 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:03:05, skipping insertion in model container [2024-06-14 12:03:05,602 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:03:05" (4/4) ... [2024-06-14 12:03:05,603 INFO L112 eAbstractionObserver]: Analyzing ICFG mix016.oepc.i [2024-06-14 12:03:05,615 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:03:05,615 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 12:03:05,615 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:03:05,655 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:03:05,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 12:03:05,735 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-14 12:03:05,735 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:03:05,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:03:05,737 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 12:03:05,739 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-14 12:03:05,745 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:03:05,749 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;@36dc5cbc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:03:05,749 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 12:03:05,752 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:03:05,752 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:03:05,752 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:03:05,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:05,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:03:05,753 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)] === [2024-06-14 12:03:05,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:05,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1248596661, now seen corresponding path program 1 times [2024-06-14 12:03:05,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:05,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168653096] [2024-06-14 12:03:05,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:05,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:05,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:06,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:06,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:06,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168653096] [2024-06-14 12:03:06,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168653096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:06,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:06,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:03:06,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655198064] [2024-06-14 12:03:06,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:06,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:03:06,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:06,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:03:06,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:03:06,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-14 12:03:06,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:06,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:06,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-14 12:03:06,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:07,093 INFO L124 PetriNetUnfolderBase]: 1116/1757 cut-off events. [2024-06-14 12:03:07,093 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-06-14 12:03:07,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3510 conditions, 1757 events. 1116/1757 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8469 event pairs, 765 based on Foata normal form. 1/1728 useless extension candidates. Maximal degree in co-relation 3495. Up to 1676 conditions per place. [2024-06-14 12:03:07,111 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-14 12:03:07,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 175 flow [2024-06-14 12:03:07,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:03:07,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:03:07,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-06-14 12:03:07,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-14 12:03:07,126 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 76 transitions. [2024-06-14 12:03:07,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 175 flow [2024-06-14 12:03:07,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 12:03:07,132 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-14 12:03:07,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-14 12:03:07,137 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-14 12:03:07,137 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-14 12:03:07,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:07,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:07,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:07,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:03:07,138 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)] === [2024-06-14 12:03:07,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:07,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1605470230, now seen corresponding path program 1 times [2024-06-14 12:03:07,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:07,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550345742] [2024-06-14 12:03:07,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:07,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:07,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:07,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:07,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550345742] [2024-06-14 12:03:07,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550345742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:07,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:07,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:03:07,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086680822] [2024-06-14 12:03:07,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:07,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:03:07,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:07,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:03:07,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:03:07,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-14 12:03:07,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:07,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:07,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-14 12:03:07,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:08,108 INFO L124 PetriNetUnfolderBase]: 1110/1756 cut-off events. [2024-06-14 12:03:08,108 INFO L125 PetriNetUnfolderBase]: For 339/339 co-relation queries the response was YES. [2024-06-14 12:03:08,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3979 conditions, 1756 events. 1110/1756 cut-off events. For 339/339 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8528 event pairs, 641 based on Foata normal form. 3/1757 useless extension candidates. Maximal degree in co-relation 3964. Up to 1652 conditions per place. [2024-06-14 12:03:08,119 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 40 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-14 12:03:08,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 242 flow [2024-06-14 12:03:08,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:03:08,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:03:08,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-14 12:03:08,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 12:03:08,123 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 98 transitions. [2024-06-14 12:03:08,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 242 flow [2024-06-14 12:03:08,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:03:08,126 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-14 12:03:08,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-14 12:03:08,127 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-14 12:03:08,127 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-14 12:03:08,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:08,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:08,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:08,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:03:08,128 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)] === [2024-06-14 12:03:08,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:08,128 INFO L85 PathProgramCache]: Analyzing trace with hash -963584375, now seen corresponding path program 1 times [2024-06-14 12:03:08,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:08,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997664297] [2024-06-14 12:03:08,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:08,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:08,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:08,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:08,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997664297] [2024-06-14 12:03:08,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997664297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:08,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:08,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:03:08,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572404238] [2024-06-14 12:03:08,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:08,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:03:08,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:08,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:03:08,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:03:09,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-14 12:03:09,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:09,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:09,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-14 12:03:09,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:09,334 INFO L124 PetriNetUnfolderBase]: 1345/2103 cut-off events. [2024-06-14 12:03:09,335 INFO L125 PetriNetUnfolderBase]: For 1107/1107 co-relation queries the response was YES. [2024-06-14 12:03:09,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5284 conditions, 2103 events. 1345/2103 cut-off events. For 1107/1107 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10170 event pairs, 592 based on Foata normal form. 3/2104 useless extension candidates. Maximal degree in co-relation 5267. Up to 1965 conditions per place. [2024-06-14 12:03:09,345 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 55 selfloop transitions, 13 changer transitions 0/73 dead transitions. [2024-06-14 12:03:09,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 73 transitions, 376 flow [2024-06-14 12:03:09,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:03:09,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:03:09,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-14 12:03:09,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5436507936507936 [2024-06-14 12:03:09,350 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 137 transitions. [2024-06-14 12:03:09,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 73 transitions, 376 flow [2024-06-14 12:03:09,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 73 transitions, 356 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-14 12:03:09,353 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 196 flow [2024-06-14 12:03:09,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=196, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-14 12:03:09,354 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-14 12:03:09,354 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 196 flow [2024-06-14 12:03:09,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:09,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:09,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:09,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:03:09,355 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)] === [2024-06-14 12:03:09,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:09,356 INFO L85 PathProgramCache]: Analyzing trace with hash 193656989, now seen corresponding path program 1 times [2024-06-14 12:03:09,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:09,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133872206] [2024-06-14 12:03:09,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:09,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:09,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:10,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:10,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:10,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133872206] [2024-06-14 12:03:10,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133872206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:10,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:10,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:03:10,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997170979] [2024-06-14 12:03:10,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:10,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:03:10,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:10,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:03:10,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:03:10,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-14 12:03:10,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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) [2024-06-14 12:03:10,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:10,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-14 12:03:10,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:10,886 INFO L124 PetriNetUnfolderBase]: 1336/2086 cut-off events. [2024-06-14 12:03:10,887 INFO L125 PetriNetUnfolderBase]: For 2178/2178 co-relation queries the response was YES. [2024-06-14 12:03:10,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5857 conditions, 2086 events. 1336/2086 cut-off events. For 2178/2178 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10079 event pairs, 450 based on Foata normal form. 6/2090 useless extension candidates. Maximal degree in co-relation 5838. Up to 1920 conditions per place. [2024-06-14 12:03:10,896 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 15 changer transitions 0/79 dead transitions. [2024-06-14 12:03:10,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 79 transitions, 436 flow [2024-06-14 12:03:10,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:03:10,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:03:10,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-14 12:03:10,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-14 12:03:10,899 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 196 flow. Second operand 7 states and 154 transitions. [2024-06-14 12:03:10,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 79 transitions, 436 flow [2024-06-14 12:03:10,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 79 transitions, 408 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:03:10,905 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 217 flow [2024-06-14 12:03:10,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=217, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-14 12:03:10,906 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-06-14 12:03:10,906 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 217 flow [2024-06-14 12:03:10,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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) [2024-06-14 12:03:10,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:10,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:10,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:03:10,907 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)] === [2024-06-14 12:03:10,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:10,908 INFO L85 PathProgramCache]: Analyzing trace with hash -760605331, now seen corresponding path program 1 times [2024-06-14 12:03:10,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:10,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357862129] [2024-06-14 12:03:10,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:10,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:11,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:11,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:11,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357862129] [2024-06-14 12:03:11,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357862129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:11,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:11,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:03:11,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061092115] [2024-06-14 12:03:11,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:11,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:03:11,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:11,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:03:11,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:03:11,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:03:11,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 217 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:11,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:11,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:03:11,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:11,960 INFO L124 PetriNetUnfolderBase]: 1326/2106 cut-off events. [2024-06-14 12:03:11,960 INFO L125 PetriNetUnfolderBase]: For 3261/3261 co-relation queries the response was YES. [2024-06-14 12:03:11,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6226 conditions, 2106 events. 1326/2106 cut-off events. For 3261/3261 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 10265 event pairs, 517 based on Foata normal form. 4/2108 useless extension candidates. Maximal degree in co-relation 6206. Up to 1963 conditions per place. [2024-06-14 12:03:11,968 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 48 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-14 12:03:11,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 375 flow [2024-06-14 12:03:11,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:03:11,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:03:11,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-06-14 12:03:11,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-14 12:03:11,969 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 217 flow. Second operand 5 states and 97 transitions. [2024-06-14 12:03:11,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 375 flow [2024-06-14 12:03:11,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 61 transitions, 336 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 12:03:11,972 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 224 flow [2024-06-14 12:03:11,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=224, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-06-14 12:03:11,973 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-06-14 12:03:11,973 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 224 flow [2024-06-14 12:03:11,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:11,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:11,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:11,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:03:11,974 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)] === [2024-06-14 12:03:11,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:11,974 INFO L85 PathProgramCache]: Analyzing trace with hash -437286924, now seen corresponding path program 1 times [2024-06-14 12:03:11,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:11,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647657150] [2024-06-14 12:03:11,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:11,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:11,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:12,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:12,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:12,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647657150] [2024-06-14 12:03:12,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647657150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:12,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:12,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:03:12,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668121011] [2024-06-14 12:03:12,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:12,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:03:12,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:12,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:03:12,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:03:12,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:03:12,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 224 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:12,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:12,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:03:12,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:13,092 INFO L124 PetriNetUnfolderBase]: 1364/2156 cut-off events. [2024-06-14 12:03:13,092 INFO L125 PetriNetUnfolderBase]: For 4528/4528 co-relation queries the response was YES. [2024-06-14 12:03:13,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6832 conditions, 2156 events. 1364/2156 cut-off events. For 4528/4528 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10493 event pairs, 487 based on Foata normal form. 4/2157 useless extension candidates. Maximal degree in co-relation 6810. Up to 1970 conditions per place. [2024-06-14 12:03:13,103 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 16 changer transitions 0/80 dead transitions. [2024-06-14 12:03:13,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 80 transitions, 510 flow [2024-06-14 12:03:13,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:03:13,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:03:13,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-14 12:03:13,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-14 12:03:13,104 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 224 flow. Second operand 6 states and 122 transitions. [2024-06-14 12:03:13,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 80 transitions, 510 flow [2024-06-14 12:03:13,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 80 transitions, 476 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-14 12:03:13,108 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 310 flow [2024-06-14 12:03:13,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=58, PETRI_TRANSITIONS=58} [2024-06-14 12:03:13,108 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2024-06-14 12:03:13,109 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 310 flow [2024-06-14 12:03:13,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:13,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:13,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:13,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:03:13,109 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)] === [2024-06-14 12:03:13,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:13,110 INFO L85 PathProgramCache]: Analyzing trace with hash -424567314, now seen corresponding path program 2 times [2024-06-14 12:03:13,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:13,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008906324] [2024-06-14 12:03:13,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:13,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:13,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:13,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008906324] [2024-06-14 12:03:13,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008906324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:13,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:13,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:03:13,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234334177] [2024-06-14 12:03:13,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:13,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:03:13,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:13,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:03:13,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:03:13,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:03:13,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 310 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:13,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:13,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:03:13,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:14,266 INFO L124 PetriNetUnfolderBase]: 1354/2145 cut-off events. [2024-06-14 12:03:14,266 INFO L125 PetriNetUnfolderBase]: For 6184/6184 co-relation queries the response was YES. [2024-06-14 12:03:14,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7445 conditions, 2145 events. 1354/2145 cut-off events. For 6184/6184 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10440 event pairs, 496 based on Foata normal form. 4/2147 useless extension candidates. Maximal degree in co-relation 7421. Up to 1995 conditions per place. [2024-06-14 12:03:14,282 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 58 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2024-06-14 12:03:14,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 74 transitions, 490 flow [2024-06-14 12:03:14,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:03:14,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:03:14,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-14 12:03:14,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-14 12:03:14,283 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 310 flow. Second operand 6 states and 114 transitions. [2024-06-14 12:03:14,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 74 transitions, 490 flow [2024-06-14 12:03:14,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 74 transitions, 462 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-06-14 12:03:14,290 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 312 flow [2024-06-14 12:03:14,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2024-06-14 12:03:14,291 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-06-14 12:03:14,292 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 312 flow [2024-06-14 12:03:14,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:14,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:14,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:14,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:03:14,292 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)] === [2024-06-14 12:03:14,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:14,293 INFO L85 PathProgramCache]: Analyzing trace with hash 877834162, now seen corresponding path program 1 times [2024-06-14 12:03:14,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:14,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252553476] [2024-06-14 12:03:14,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:14,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:14,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:15,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:15,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:15,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252553476] [2024-06-14 12:03:15,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252553476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:15,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:15,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:03:15,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503678781] [2024-06-14 12:03:15,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:15,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:03:15,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:15,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:03:15,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:03:15,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:03:15,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 312 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:15,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:15,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:03:15,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:15,652 INFO L124 PetriNetUnfolderBase]: 1376/2167 cut-off events. [2024-06-14 12:03:15,652 INFO L125 PetriNetUnfolderBase]: For 7393/7393 co-relation queries the response was YES. [2024-06-14 12:03:15,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7660 conditions, 2167 events. 1376/2167 cut-off events. For 7393/7393 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10507 event pairs, 489 based on Foata normal form. 4/2169 useless extension candidates. Maximal degree in co-relation 7633. Up to 2006 conditions per place. [2024-06-14 12:03:15,666 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 68 selfloop transitions, 14 changer transitions 0/87 dead transitions. [2024-06-14 12:03:15,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 87 transitions, 568 flow [2024-06-14 12:03:15,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:03:15,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:03:15,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-14 12:03:15,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-14 12:03:15,669 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 312 flow. Second operand 7 states and 137 transitions. [2024-06-14 12:03:15,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 87 transitions, 568 flow [2024-06-14 12:03:15,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 87 transitions, 532 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 12:03:15,678 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 342 flow [2024-06-14 12:03:15,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=342, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-14 12:03:15,681 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-14 12:03:15,681 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 342 flow [2024-06-14 12:03:15,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:15,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:15,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:15,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:03:15,682 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)] === [2024-06-14 12:03:15,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:15,682 INFO L85 PathProgramCache]: Analyzing trace with hash -670991756, now seen corresponding path program 2 times [2024-06-14 12:03:15,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:15,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94155638] [2024-06-14 12:03:15,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:15,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:16,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:16,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:16,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94155638] [2024-06-14 12:03:16,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94155638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:16,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:16,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:03:16,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875015826] [2024-06-14 12:03:16,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:16,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:03:16,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:16,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:03:16,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:03:16,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:03:16,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 342 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:16,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:16,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:03:16,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:17,121 INFO L124 PetriNetUnfolderBase]: 1414/2221 cut-off events. [2024-06-14 12:03:17,122 INFO L125 PetriNetUnfolderBase]: For 9499/9499 co-relation queries the response was YES. [2024-06-14 12:03:17,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8402 conditions, 2221 events. 1414/2221 cut-off events. For 9499/9499 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10808 event pairs, 467 based on Foata normal form. 4/2222 useless extension candidates. Maximal degree in co-relation 8376. Up to 1964 conditions per place. [2024-06-14 12:03:17,135 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 63 selfloop transitions, 26 changer transitions 0/94 dead transitions. [2024-06-14 12:03:17,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 94 transitions, 684 flow [2024-06-14 12:03:17,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:03:17,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:03:17,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-14 12:03:17,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-14 12:03:17,138 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 342 flow. Second operand 7 states and 142 transitions. [2024-06-14 12:03:17,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 94 transitions, 684 flow [2024-06-14 12:03:17,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 94 transitions, 642 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 12:03:17,145 INFO L231 Difference]: Finished difference. Result has 66 places, 67 transitions, 426 flow [2024-06-14 12:03:17,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=426, PETRI_PLACES=66, PETRI_TRANSITIONS=67} [2024-06-14 12:03:17,145 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-14 12:03:17,145 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 67 transitions, 426 flow [2024-06-14 12:03:17,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:17,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:17,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:17,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:03:17,146 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)] === [2024-06-14 12:03:17,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:17,146 INFO L85 PathProgramCache]: Analyzing trace with hash -276683846, now seen corresponding path program 3 times [2024-06-14 12:03:17,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:17,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824758650] [2024-06-14 12:03:17,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:17,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:17,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:17,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:17,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824758650] [2024-06-14 12:03:17,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824758650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:17,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:17,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:03:17,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495704977] [2024-06-14 12:03:17,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:17,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:03:17,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:17,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:03:17,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:03:17,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:03:17,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 67 transitions, 426 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:17,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:17,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:03:17,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:18,388 INFO L124 PetriNetUnfolderBase]: 1404/2210 cut-off events. [2024-06-14 12:03:18,388 INFO L125 PetriNetUnfolderBase]: For 11926/11926 co-relation queries the response was YES. [2024-06-14 12:03:18,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8832 conditions, 2210 events. 1404/2210 cut-off events. For 11926/11926 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10754 event pairs, 491 based on Foata normal form. 4/2212 useless extension candidates. Maximal degree in co-relation 8805. Up to 2045 conditions per place. [2024-06-14 12:03:18,398 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 69 selfloop transitions, 14 changer transitions 0/88 dead transitions. [2024-06-14 12:03:18,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 88 transitions, 648 flow [2024-06-14 12:03:18,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:03:18,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:03:18,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 12:03:18,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-14 12:03:18,399 INFO L175 Difference]: Start difference. First operand has 66 places, 67 transitions, 426 flow. Second operand 7 states and 132 transitions. [2024-06-14 12:03:18,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 88 transitions, 648 flow [2024-06-14 12:03:18,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 88 transitions, 592 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 12:03:18,410 INFO L231 Difference]: Finished difference. Result has 70 places, 67 transitions, 406 flow [2024-06-14 12:03:18,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=406, PETRI_PLACES=70, PETRI_TRANSITIONS=67} [2024-06-14 12:03:18,412 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-14 12:03:18,413 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 67 transitions, 406 flow [2024-06-14 12:03:18,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:18,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:18,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:18,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:03:18,414 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)] === [2024-06-14 12:03:18,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:18,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1055216596, now seen corresponding path program 1 times [2024-06-14 12:03:18,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:18,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334958899] [2024-06-14 12:03:18,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:18,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:18,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:19,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:19,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:19,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334958899] [2024-06-14 12:03:19,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334958899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:19,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:19,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:03:19,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019044443] [2024-06-14 12:03:19,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:19,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:03:19,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:19,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:03:19,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:03:19,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:03:19,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 67 transitions, 406 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) [2024-06-14 12:03:19,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:19,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:03:19,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:20,262 INFO L124 PetriNetUnfolderBase]: 1710/2636 cut-off events. [2024-06-14 12:03:20,262 INFO L125 PetriNetUnfolderBase]: For 15801/15801 co-relation queries the response was YES. [2024-06-14 12:03:20,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10499 conditions, 2636 events. 1710/2636 cut-off events. For 15801/15801 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12433 event pairs, 617 based on Foata normal form. 4/2638 useless extension candidates. Maximal degree in co-relation 10470. Up to 2493 conditions per place. [2024-06-14 12:03:20,274 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 73 selfloop transitions, 15 changer transitions 0/92 dead transitions. [2024-06-14 12:03:20,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 92 transitions, 679 flow [2024-06-14 12:03:20,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:03:20,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:03:20,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 12:03:20,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-14 12:03:20,276 INFO L175 Difference]: Start difference. First operand has 70 places, 67 transitions, 406 flow. Second operand 7 states and 125 transitions. [2024-06-14 12:03:20,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 92 transitions, 679 flow [2024-06-14 12:03:20,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 92 transitions, 630 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 12:03:20,288 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 451 flow [2024-06-14 12:03:20,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=451, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2024-06-14 12:03:20,289 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 29 predicate places. [2024-06-14 12:03:20,289 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 451 flow [2024-06-14 12:03:20,289 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) [2024-06-14 12:03:20,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:20,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:20,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:03:20,290 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:20,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:20,290 INFO L85 PathProgramCache]: Analyzing trace with hash 378904292, now seen corresponding path program 1 times [2024-06-14 12:03:20,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:20,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213745550] [2024-06-14 12:03:20,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:20,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:20,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:20,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213745550] [2024-06-14 12:03:20,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213745550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:20,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:20,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:03:20,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396623232] [2024-06-14 12:03:20,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:20,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:03:20,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:20,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:03:20,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:03:20,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:03:20,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 451 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:20,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:20,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:03:20,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:21,441 INFO L124 PetriNetUnfolderBase]: 1799/2725 cut-off events. [2024-06-14 12:03:21,442 INFO L125 PetriNetUnfolderBase]: For 21039/21043 co-relation queries the response was YES. [2024-06-14 12:03:21,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11675 conditions, 2725 events. 1799/2725 cut-off events. For 21039/21043 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12709 event pairs, 723 based on Foata normal form. 5/2711 useless extension candidates. Maximal degree in co-relation 11644. Up to 2667 conditions per place. [2024-06-14 12:03:21,459 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 68 selfloop transitions, 8 changer transitions 0/83 dead transitions. [2024-06-14 12:03:21,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 83 transitions, 643 flow [2024-06-14 12:03:21,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:03:21,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:03:21,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-14 12:03:21,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-14 12:03:21,461 INFO L175 Difference]: Start difference. First operand has 72 places, 72 transitions, 451 flow. Second operand 5 states and 88 transitions. [2024-06-14 12:03:21,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 83 transitions, 643 flow [2024-06-14 12:03:21,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 83 transitions, 598 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:03:21,479 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 454 flow [2024-06-14 12:03:21,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=454, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-14 12:03:21,480 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-14 12:03:21,480 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 454 flow [2024-06-14 12:03:21,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:21,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:21,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:21,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:03:21,481 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)] === [2024-06-14 12:03:21,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:21,481 INFO L85 PathProgramCache]: Analyzing trace with hash 496469163, now seen corresponding path program 1 times [2024-06-14 12:03:21,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:21,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870331366] [2024-06-14 12:03:21,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:21,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:21,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:22,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:22,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:22,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870331366] [2024-06-14 12:03:22,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870331366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:22,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:22,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:03:22,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644023059] [2024-06-14 12:03:22,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:22,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:03:22,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:22,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:03:22,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:03:22,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:03:22,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 454 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:22,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:22,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:03:22,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:23,206 INFO L124 PetriNetUnfolderBase]: 1737/2673 cut-off events. [2024-06-14 12:03:23,207 INFO L125 PetriNetUnfolderBase]: For 24230/24230 co-relation queries the response was YES. [2024-06-14 12:03:23,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11938 conditions, 2673 events. 1737/2673 cut-off events. For 24230/24230 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13145 event pairs, 616 based on Foata normal form. 4/2663 useless extension candidates. Maximal degree in co-relation 11906. Up to 2426 conditions per place. [2024-06-14 12:03:23,220 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 92 selfloop transitions, 23 changer transitions 0/122 dead transitions. [2024-06-14 12:03:23,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 122 transitions, 906 flow [2024-06-14 12:03:23,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:03:23,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:03:23,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-14 12:03:23,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-14 12:03:23,221 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 454 flow. Second operand 9 states and 179 transitions. [2024-06-14 12:03:23,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 122 transitions, 906 flow [2024-06-14 12:03:23,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 122 transitions, 880 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 12:03:23,233 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 556 flow [2024-06-14 12:03:23,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=556, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2024-06-14 12:03:23,233 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-14 12:03:23,234 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 556 flow [2024-06-14 12:03:23,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:23,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:23,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:23,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:03:23,234 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)] === [2024-06-14 12:03:23,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:23,235 INFO L85 PathProgramCache]: Analyzing trace with hash 496559373, now seen corresponding path program 2 times [2024-06-14 12:03:23,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:23,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008200610] [2024-06-14 12:03:23,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:23,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:24,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:24,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:24,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008200610] [2024-06-14 12:03:24,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008200610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:24,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:24,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:03:24,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697287537] [2024-06-14 12:03:24,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:24,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:03:24,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:24,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:03:24,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:03:24,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:03:24,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 556 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:24,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:24,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:03:24,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:25,015 INFO L124 PetriNetUnfolderBase]: 1729/2663 cut-off events. [2024-06-14 12:03:25,015 INFO L125 PetriNetUnfolderBase]: For 28102/28106 co-relation queries the response was YES. [2024-06-14 12:03:25,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12503 conditions, 2663 events. 1729/2663 cut-off events. For 28102/28106 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13128 event pairs, 619 based on Foata normal form. 4/2652 useless extension candidates. Maximal degree in co-relation 12470. Up to 2453 conditions per place. [2024-06-14 12:03:25,038 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 88 selfloop transitions, 17 changer transitions 0/112 dead transitions. [2024-06-14 12:03:25,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 112 transitions, 848 flow [2024-06-14 12:03:25,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:03:25,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:03:25,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 12:03:25,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-14 12:03:25,040 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 556 flow. Second operand 8 states and 155 transitions. [2024-06-14 12:03:25,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 112 transitions, 848 flow [2024-06-14 12:03:25,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 112 transitions, 778 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 12:03:25,058 INFO L231 Difference]: Finished difference. Result has 82 places, 81 transitions, 528 flow [2024-06-14 12:03:25,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=528, PETRI_PLACES=82, PETRI_TRANSITIONS=81} [2024-06-14 12:03:25,059 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-14 12:03:25,059 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 528 flow [2024-06-14 12:03:25,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:25,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:25,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:25,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:03:25,060 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)] === [2024-06-14 12:03:25,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:25,060 INFO L85 PathProgramCache]: Analyzing trace with hash 500278443, now seen corresponding path program 3 times [2024-06-14 12:03:25,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:25,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772150376] [2024-06-14 12:03:25,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:25,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:26,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:26,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:26,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772150376] [2024-06-14 12:03:26,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772150376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:26,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:26,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:03:26,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133944811] [2024-06-14 12:03:26,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:26,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:03:26,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:26,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:03:26,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:03:26,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:03:26,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 528 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:26,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:26,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:03:26,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:26,797 INFO L124 PetriNetUnfolderBase]: 1753/2696 cut-off events. [2024-06-14 12:03:26,797 INFO L125 PetriNetUnfolderBase]: For 31703/31711 co-relation queries the response was YES. [2024-06-14 12:03:26,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12882 conditions, 2696 events. 1753/2696 cut-off events. For 31703/31711 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13326 event pairs, 582 based on Foata normal form. 4/2682 useless extension candidates. Maximal degree in co-relation 12847. Up to 2391 conditions per place. [2024-06-14 12:03:26,813 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 76 selfloop transitions, 31 changer transitions 0/114 dead transitions. [2024-06-14 12:03:26,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 114 transitions, 864 flow [2024-06-14 12:03:26,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:03:26,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:03:26,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 12:03:26,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-14 12:03:26,825 INFO L175 Difference]: Start difference. First operand has 82 places, 81 transitions, 528 flow. Second operand 8 states and 158 transitions. [2024-06-14 12:03:26,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 114 transitions, 864 flow [2024-06-14 12:03:26,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 114 transitions, 822 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 12:03:26,850 INFO L231 Difference]: Finished difference. Result has 83 places, 84 transitions, 602 flow [2024-06-14 12:03:26,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=602, PETRI_PLACES=83, PETRI_TRANSITIONS=84} [2024-06-14 12:03:26,850 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-06-14 12:03:26,850 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 84 transitions, 602 flow [2024-06-14 12:03:26,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:26,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:26,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:26,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:03:26,851 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:26,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:26,852 INFO L85 PathProgramCache]: Analyzing trace with hash 12736397, now seen corresponding path program 4 times [2024-06-14 12:03:26,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:26,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861964419] [2024-06-14 12:03:26,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:26,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:28,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:28,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:28,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861964419] [2024-06-14 12:03:28,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861964419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:28,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:28,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:03:28,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996197430] [2024-06-14 12:03:28,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:28,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:03:28,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:28,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:03:28,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:03:28,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:03:28,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 84 transitions, 602 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:28,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:28,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:03:28,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:28,683 INFO L124 PetriNetUnfolderBase]: 1762/2711 cut-off events. [2024-06-14 12:03:28,683 INFO L125 PetriNetUnfolderBase]: For 36233/36245 co-relation queries the response was YES. [2024-06-14 12:03:28,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13565 conditions, 2711 events. 1762/2711 cut-off events. For 36233/36245 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13398 event pairs, 623 based on Foata normal form. 4/2694 useless extension candidates. Maximal degree in co-relation 13529. Up to 2494 conditions per place. [2024-06-14 12:03:28,716 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 87 selfloop transitions, 19 changer transitions 0/113 dead transitions. [2024-06-14 12:03:28,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 113 transitions, 930 flow [2024-06-14 12:03:28,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:03:28,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:03:28,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:03:28,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-14 12:03:28,721 INFO L175 Difference]: Start difference. First operand has 83 places, 84 transitions, 602 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:03:28,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 113 transitions, 930 flow [2024-06-14 12:03:28,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 113 transitions, 838 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 12:03:28,745 INFO L231 Difference]: Finished difference. Result has 85 places, 87 transitions, 608 flow [2024-06-14 12:03:28,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=608, PETRI_PLACES=85, PETRI_TRANSITIONS=87} [2024-06-14 12:03:28,746 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-14 12:03:28,746 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 87 transitions, 608 flow [2024-06-14 12:03:28,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:28,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:28,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:28,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:03:28,748 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)] === [2024-06-14 12:03:28,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:28,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1648292003, now seen corresponding path program 1 times [2024-06-14 12:03:28,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:28,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793481119] [2024-06-14 12:03:28,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:28,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:28,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:29,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:29,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:29,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793481119] [2024-06-14 12:03:29,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793481119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:29,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:29,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:03:29,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342096231] [2024-06-14 12:03:29,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:29,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:03:29,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:29,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:03:29,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:03:29,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:03:29,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 87 transitions, 608 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) [2024-06-14 12:03:29,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:29,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:03:29,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:30,510 INFO L124 PetriNetUnfolderBase]: 1925/2923 cut-off events. [2024-06-14 12:03:30,510 INFO L125 PetriNetUnfolderBase]: For 41497/41497 co-relation queries the response was YES. [2024-06-14 12:03:30,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14888 conditions, 2923 events. 1925/2923 cut-off events. For 41497/41497 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13756 event pairs, 683 based on Foata normal form. 2/2921 useless extension candidates. Maximal degree in co-relation 14851. Up to 2753 conditions per place. [2024-06-14 12:03:30,530 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 89 selfloop transitions, 19 changer transitions 0/113 dead transitions. [2024-06-14 12:03:30,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 113 transitions, 947 flow [2024-06-14 12:03:30,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:03:30,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:03:30,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 12:03:30,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:03:30,532 INFO L175 Difference]: Start difference. First operand has 85 places, 87 transitions, 608 flow. Second operand 7 states and 126 transitions. [2024-06-14 12:03:30,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 113 transitions, 947 flow [2024-06-14 12:03:30,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 113 transitions, 867 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 12:03:30,569 INFO L231 Difference]: Finished difference. Result has 86 places, 93 transitions, 661 flow [2024-06-14 12:03:30,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=661, PETRI_PLACES=86, PETRI_TRANSITIONS=93} [2024-06-14 12:03:30,569 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-14 12:03:30,569 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 93 transitions, 661 flow [2024-06-14 12:03:30,570 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) [2024-06-14 12:03:30,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:30,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:30,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:03:30,570 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:30,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:30,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1098649674, now seen corresponding path program 1 times [2024-06-14 12:03:30,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:30,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728504989] [2024-06-14 12:03:30,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:30,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:30,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:31,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:31,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:31,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728504989] [2024-06-14 12:03:31,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728504989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:31,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:31,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:03:31,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197587619] [2024-06-14 12:03:31,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:31,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:03:31,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:31,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:03:31,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:03:31,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:03:31,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 93 transitions, 661 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) [2024-06-14 12:03:31,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:31,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:03:31,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:31,778 INFO L124 PetriNetUnfolderBase]: 1930/2914 cut-off events. [2024-06-14 12:03:31,779 INFO L125 PetriNetUnfolderBase]: For 46457/46475 co-relation queries the response was YES. [2024-06-14 12:03:31,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15244 conditions, 2914 events. 1930/2914 cut-off events. For 46457/46475 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13604 event pairs, 720 based on Foata normal form. 7/2898 useless extension candidates. Maximal degree in co-relation 15206. Up to 2830 conditions per place. [2024-06-14 12:03:31,795 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 87 selfloop transitions, 11 changer transitions 0/107 dead transitions. [2024-06-14 12:03:31,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 107 transitions, 907 flow [2024-06-14 12:03:31,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:03:31,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:03:31,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-14 12:03:31,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-14 12:03:31,796 INFO L175 Difference]: Start difference. First operand has 86 places, 93 transitions, 661 flow. Second operand 6 states and 103 transitions. [2024-06-14 12:03:31,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 107 transitions, 907 flow [2024-06-14 12:03:31,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 107 transitions, 847 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 12:03:31,837 INFO L231 Difference]: Finished difference. Result has 87 places, 96 transitions, 659 flow [2024-06-14 12:03:31,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=659, PETRI_PLACES=87, PETRI_TRANSITIONS=96} [2024-06-14 12:03:31,838 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-14 12:03:31,838 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 96 transitions, 659 flow [2024-06-14 12:03:31,839 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) [2024-06-14 12:03:31,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:31,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:31,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:03:31,839 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)] === [2024-06-14 12:03:31,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:31,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1789384519, now seen corresponding path program 1 times [2024-06-14 12:03:31,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:31,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543186336] [2024-06-14 12:03:31,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:31,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:32,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:32,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:32,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543186336] [2024-06-14 12:03:32,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543186336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:32,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:32,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:03:32,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209969003] [2024-06-14 12:03:32,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:32,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:03:32,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:32,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:03:32,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:03:33,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:03:33,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 96 transitions, 659 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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) [2024-06-14 12:03:33,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:33,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:03:33,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:33,728 INFO L124 PetriNetUnfolderBase]: 1986/3066 cut-off events. [2024-06-14 12:03:33,728 INFO L125 PetriNetUnfolderBase]: For 57492/57492 co-relation queries the response was YES. [2024-06-14 12:03:33,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16995 conditions, 3066 events. 1986/3066 cut-off events. For 57492/57492 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 15610 event pairs, 509 based on Foata normal form. 16/3068 useless extension candidates. Maximal degree in co-relation 16956. Up to 2526 conditions per place. [2024-06-14 12:03:33,745 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 118 selfloop transitions, 26 changer transitions 0/151 dead transitions. [2024-06-14 12:03:33,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 151 transitions, 1247 flow [2024-06-14 12:03:33,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:03:33,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:03:33,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-14 12:03:33,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-06-14 12:03:33,761 INFO L175 Difference]: Start difference. First operand has 87 places, 96 transitions, 659 flow. Second operand 10 states and 201 transitions. [2024-06-14 12:03:33,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 151 transitions, 1247 flow [2024-06-14 12:03:33,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 151 transitions, 1211 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 12:03:33,792 INFO L231 Difference]: Finished difference. Result has 93 places, 98 transitions, 739 flow [2024-06-14 12:03:33,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=739, PETRI_PLACES=93, PETRI_TRANSITIONS=98} [2024-06-14 12:03:33,792 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-14 12:03:33,793 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 98 transitions, 739 flow [2024-06-14 12:03:33,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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) [2024-06-14 12:03:33,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:33,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:33,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:03:33,793 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)] === [2024-06-14 12:03:33,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:33,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1671453659, now seen corresponding path program 2 times [2024-06-14 12:03:33,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:33,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925168732] [2024-06-14 12:03:33,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:33,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:33,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:34,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:34,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:34,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925168732] [2024-06-14 12:03:34,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925168732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:34,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:34,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:03:34,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690201390] [2024-06-14 12:03:34,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:34,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:03:34,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:34,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:03:34,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:03:35,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:03:35,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 98 transitions, 739 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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) [2024-06-14 12:03:35,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:35,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:03:35,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:36,012 INFO L124 PetriNetUnfolderBase]: 2015/3127 cut-off events. [2024-06-14 12:03:36,012 INFO L125 PetriNetUnfolderBase]: For 63758/63758 co-relation queries the response was YES. [2024-06-14 12:03:36,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17315 conditions, 3127 events. 2015/3127 cut-off events. For 63758/63758 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 15992 event pairs, 613 based on Foata normal form. 36/3155 useless extension candidates. Maximal degree in co-relation 17275. Up to 2656 conditions per place. [2024-06-14 12:03:36,037 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 115 selfloop transitions, 25 changer transitions 0/147 dead transitions. [2024-06-14 12:03:36,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 147 transitions, 1203 flow [2024-06-14 12:03:36,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:03:36,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:03:36,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-14 12:03:36,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-14 12:03:36,042 INFO L175 Difference]: Start difference. First operand has 93 places, 98 transitions, 739 flow. Second operand 10 states and 196 transitions. [2024-06-14 12:03:36,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 147 transitions, 1203 flow [2024-06-14 12:03:36,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 147 transitions, 1159 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 12:03:36,086 INFO L231 Difference]: Finished difference. Result has 97 places, 99 transitions, 788 flow [2024-06-14 12:03:36,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=788, PETRI_PLACES=97, PETRI_TRANSITIONS=99} [2024-06-14 12:03:36,087 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-14 12:03:36,087 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 99 transitions, 788 flow [2024-06-14 12:03:36,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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) [2024-06-14 12:03:36,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:36,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:36,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:03:36,088 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)] === [2024-06-14 12:03:36,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:36,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1789726037, now seen corresponding path program 1 times [2024-06-14 12:03:36,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:36,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515593604] [2024-06-14 12:03:36,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:36,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:37,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:37,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515593604] [2024-06-14 12:03:37,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515593604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:37,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:37,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:03:37,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82750385] [2024-06-14 12:03:37,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:37,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:03:37,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:37,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:03:37,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:03:37,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:03:37,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 99 transitions, 788 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) [2024-06-14 12:03:37,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:37,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:03:37,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:37,911 INFO L124 PetriNetUnfolderBase]: 2180/3336 cut-off events. [2024-06-14 12:03:37,911 INFO L125 PetriNetUnfolderBase]: For 64971/64973 co-relation queries the response was YES. [2024-06-14 12:03:37,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18548 conditions, 3336 events. 2180/3336 cut-off events. For 64971/64973 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16332 event pairs, 662 based on Foata normal form. 4/3333 useless extension candidates. Maximal degree in co-relation 18506. Up to 3098 conditions per place. [2024-06-14 12:03:37,927 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 103 selfloop transitions, 26 changer transitions 0/134 dead transitions. [2024-06-14 12:03:37,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 134 transitions, 1181 flow [2024-06-14 12:03:37,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:03:37,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:03:37,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 12:03:37,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-14 12:03:37,929 INFO L175 Difference]: Start difference. First operand has 97 places, 99 transitions, 788 flow. Second operand 8 states and 149 transitions. [2024-06-14 12:03:37,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 134 transitions, 1181 flow [2024-06-14 12:03:37,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 134 transitions, 1130 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 12:03:37,964 INFO L231 Difference]: Finished difference. Result has 98 places, 104 transitions, 861 flow [2024-06-14 12:03:37,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=861, PETRI_PLACES=98, PETRI_TRANSITIONS=104} [2024-06-14 12:03:37,965 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-14 12:03:37,965 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 104 transitions, 861 flow [2024-06-14 12:03:37,965 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) [2024-06-14 12:03:37,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:37,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:37,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:03:37,966 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)] === [2024-06-14 12:03:37,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:37,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1789541339, now seen corresponding path program 3 times [2024-06-14 12:03:37,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:37,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475232822] [2024-06-14 12:03:37,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:37,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:37,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:39,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:39,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:39,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475232822] [2024-06-14 12:03:39,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475232822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:39,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:39,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:03:39,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534261562] [2024-06-14 12:03:39,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:39,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:03:39,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:39,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:03:39,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:03:39,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:03:39,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 104 transitions, 861 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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) [2024-06-14 12:03:39,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:39,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:03:39,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:39,921 INFO L124 PetriNetUnfolderBase]: 2129/3313 cut-off events. [2024-06-14 12:03:39,921 INFO L125 PetriNetUnfolderBase]: For 76214/76218 co-relation queries the response was YES. [2024-06-14 12:03:39,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19102 conditions, 3313 events. 2129/3313 cut-off events. For 76214/76218 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 17341 event pairs, 624 based on Foata normal form. 24/3325 useless extension candidates. Maximal degree in co-relation 19058. Up to 2814 conditions per place. [2024-06-14 12:03:39,941 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 101 selfloop transitions, 36 changer transitions 0/145 dead transitions. [2024-06-14 12:03:39,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 145 transitions, 1305 flow [2024-06-14 12:03:39,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:03:39,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:03:39,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-14 12:03:39,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-14 12:03:39,943 INFO L175 Difference]: Start difference. First operand has 98 places, 104 transitions, 861 flow. Second operand 9 states and 179 transitions. [2024-06-14 12:03:39,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 145 transitions, 1305 flow [2024-06-14 12:03:39,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 145 transitions, 1222 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 12:03:39,978 INFO L231 Difference]: Finished difference. Result has 102 places, 105 transitions, 894 flow [2024-06-14 12:03:39,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=894, PETRI_PLACES=102, PETRI_TRANSITIONS=105} [2024-06-14 12:03:39,978 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-14 12:03:39,979 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 105 transitions, 894 flow [2024-06-14 12:03:39,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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) [2024-06-14 12:03:39,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:39,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:39,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:03:39,979 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:39,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:39,980 INFO L85 PathProgramCache]: Analyzing trace with hash -945553371, now seen corresponding path program 1 times [2024-06-14 12:03:39,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:39,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045360022] [2024-06-14 12:03:39,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:39,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:39,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:40,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:40,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:40,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045360022] [2024-06-14 12:03:40,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045360022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:40,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:40,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:03:40,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625630154] [2024-06-14 12:03:40,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:40,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:03:40,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:40,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:03:40,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:03:40,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:03:40,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 105 transitions, 894 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) [2024-06-14 12:03:40,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:40,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:03:40,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:41,248 INFO L124 PetriNetUnfolderBase]: 2292/3510 cut-off events. [2024-06-14 12:03:41,249 INFO L125 PetriNetUnfolderBase]: For 80271/80289 co-relation queries the response was YES. [2024-06-14 12:03:41,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20430 conditions, 3510 events. 2292/3510 cut-off events. For 80271/80289 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 17516 event pairs, 792 based on Foata normal form. 6/3491 useless extension candidates. Maximal degree in co-relation 20385. Up to 3383 conditions per place. [2024-06-14 12:03:41,273 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 98 selfloop transitions, 18 changer transitions 0/127 dead transitions. [2024-06-14 12:03:41,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 127 transitions, 1262 flow [2024-06-14 12:03:41,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:03:41,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:03:41,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-14 12:03:41,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-14 12:03:41,275 INFO L175 Difference]: Start difference. First operand has 102 places, 105 transitions, 894 flow. Second operand 6 states and 110 transitions. [2024-06-14 12:03:41,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 127 transitions, 1262 flow [2024-06-14 12:03:41,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 127 transitions, 1182 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 12:03:41,326 INFO L231 Difference]: Finished difference. Result has 101 places, 111 transitions, 915 flow [2024-06-14 12:03:41,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=915, PETRI_PLACES=101, PETRI_TRANSITIONS=111} [2024-06-14 12:03:41,326 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-14 12:03:41,327 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 111 transitions, 915 flow [2024-06-14 12:03:41,327 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) [2024-06-14 12:03:41,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:41,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:41,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:03:41,327 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)] === [2024-06-14 12:03:41,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:41,328 INFO L85 PathProgramCache]: Analyzing trace with hash 214424917, now seen corresponding path program 2 times [2024-06-14 12:03:41,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:41,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291826037] [2024-06-14 12:03:41,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:41,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:41,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:42,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:42,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291826037] [2024-06-14 12:03:42,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291826037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:42,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:42,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:03:42,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598394649] [2024-06-14 12:03:42,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:42,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:03:42,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:42,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:03:42,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:03:42,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:03:42,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 111 transitions, 915 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) [2024-06-14 12:03:42,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:42,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:03:42,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:43,087 INFO L124 PetriNetUnfolderBase]: 2330/3573 cut-off events. [2024-06-14 12:03:43,088 INFO L125 PetriNetUnfolderBase]: For 85332/85342 co-relation queries the response was YES. [2024-06-14 12:03:43,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21039 conditions, 3573 events. 2330/3573 cut-off events. For 85332/85342 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 17794 event pairs, 735 based on Foata normal form. 4/3571 useless extension candidates. Maximal degree in co-relation 20993. Up to 3374 conditions per place. [2024-06-14 12:03:43,109 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 114 selfloop transitions, 21 changer transitions 0/142 dead transitions. [2024-06-14 12:03:43,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 142 transitions, 1320 flow [2024-06-14 12:03:43,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:03:43,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:03:43,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:03:43,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:03:43,111 INFO L175 Difference]: Start difference. First operand has 101 places, 111 transitions, 915 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:03:43,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 142 transitions, 1320 flow [2024-06-14 12:03:43,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 142 transitions, 1292 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-14 12:03:43,182 INFO L231 Difference]: Finished difference. Result has 108 places, 116 transitions, 1017 flow [2024-06-14 12:03:43,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1017, PETRI_PLACES=108, PETRI_TRANSITIONS=116} [2024-06-14 12:03:43,182 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-14 12:03:43,183 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 116 transitions, 1017 flow [2024-06-14 12:03:43,183 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) [2024-06-14 12:03:43,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:43,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:43,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:03:43,183 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)] === [2024-06-14 12:03:43,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:43,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1505597255, now seen corresponding path program 4 times [2024-06-14 12:03:43,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:43,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647314573] [2024-06-14 12:03:43,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:43,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:44,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:44,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:44,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647314573] [2024-06-14 12:03:44,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647314573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:44,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:44,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:03:44,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472203391] [2024-06-14 12:03:44,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:44,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:03:44,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:44,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:03:44,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:03:44,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:03:44,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 116 transitions, 1017 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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) [2024-06-14 12:03:44,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:44,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:03:44,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:45,060 INFO L124 PetriNetUnfolderBase]: 2252/3522 cut-off events. [2024-06-14 12:03:45,060 INFO L125 PetriNetUnfolderBase]: For 98832/98842 co-relation queries the response was YES. [2024-06-14 12:03:45,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21337 conditions, 3522 events. 2252/3522 cut-off events. For 98832/98842 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18471 event pairs, 640 based on Foata normal form. 28/3539 useless extension candidates. Maximal degree in co-relation 21288. Up to 3070 conditions per place. [2024-06-14 12:03:45,085 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 117 selfloop transitions, 25 changer transitions 0/153 dead transitions. [2024-06-14 12:03:45,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 153 transitions, 1465 flow [2024-06-14 12:03:45,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:03:45,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:03:45,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 12:03:45,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-14 12:03:45,087 INFO L175 Difference]: Start difference. First operand has 108 places, 116 transitions, 1017 flow. Second operand 9 states and 171 transitions. [2024-06-14 12:03:45,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 153 transitions, 1465 flow [2024-06-14 12:03:45,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 153 transitions, 1378 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 12:03:45,183 INFO L231 Difference]: Finished difference. Result has 112 places, 117 transitions, 1028 flow [2024-06-14 12:03:45,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1028, PETRI_PLACES=112, PETRI_TRANSITIONS=117} [2024-06-14 12:03:45,184 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-14 12:03:45,184 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 117 transitions, 1028 flow [2024-06-14 12:03:45,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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) [2024-06-14 12:03:45,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:45,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:45,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:03:45,185 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)] === [2024-06-14 12:03:45,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:45,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1541798159, now seen corresponding path program 3 times [2024-06-14 12:03:45,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:45,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913180898] [2024-06-14 12:03:45,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:45,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:45,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:46,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:46,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913180898] [2024-06-14 12:03:46,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913180898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:46,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:46,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:03:46,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408457712] [2024-06-14 12:03:46,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:46,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:03:46,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:46,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:03:46,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:03:46,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:03:46,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 117 transitions, 1028 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) [2024-06-14 12:03:46,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:46,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:03:46,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:46,990 INFO L124 PetriNetUnfolderBase]: 2406/3701 cut-off events. [2024-06-14 12:03:46,990 INFO L125 PetriNetUnfolderBase]: For 101153/101163 co-relation queries the response was YES. [2024-06-14 12:03:47,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22647 conditions, 3701 events. 2406/3701 cut-off events. For 101153/101163 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 18702 event pairs, 749 based on Foata normal form. 4/3699 useless extension candidates. Maximal degree in co-relation 22597. Up to 3506 conditions per place. [2024-06-14 12:03:47,014 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 116 selfloop transitions, 21 changer transitions 0/144 dead transitions. [2024-06-14 12:03:47,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 144 transitions, 1416 flow [2024-06-14 12:03:47,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:03:47,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:03:47,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:03:47,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-14 12:03:47,016 INFO L175 Difference]: Start difference. First operand has 112 places, 117 transitions, 1028 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:03:47,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 144 transitions, 1416 flow [2024-06-14 12:03:47,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 144 transitions, 1354 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 12:03:47,119 INFO L231 Difference]: Finished difference. Result has 113 places, 119 transitions, 1070 flow [2024-06-14 12:03:47,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1070, PETRI_PLACES=113, PETRI_TRANSITIONS=119} [2024-06-14 12:03:47,120 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 70 predicate places. [2024-06-14 12:03:47,120 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 119 transitions, 1070 flow [2024-06-14 12:03:47,120 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) [2024-06-14 12:03:47,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:47,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:47,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:03:47,121 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)] === [2024-06-14 12:03:47,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:47,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1030125855, now seen corresponding path program 1 times [2024-06-14 12:03:47,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:47,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940765278] [2024-06-14 12:03:47,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:47,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:47,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:48,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:48,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:48,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940765278] [2024-06-14 12:03:48,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940765278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:48,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:48,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:03:48,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886181044] [2024-06-14 12:03:48,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:48,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:03:48,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:48,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:03:48,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:03:48,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:03:48,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 119 transitions, 1070 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) [2024-06-14 12:03:48,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:48,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:03:48,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:49,096 INFO L124 PetriNetUnfolderBase]: 2416/3719 cut-off events. [2024-06-14 12:03:49,096 INFO L125 PetriNetUnfolderBase]: For 103392/103392 co-relation queries the response was YES. [2024-06-14 12:03:49,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22740 conditions, 3719 events. 2416/3719 cut-off events. For 103392/103392 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 18829 event pairs, 724 based on Foata normal form. 2/3719 useless extension candidates. Maximal degree in co-relation 22689. Up to 3511 conditions per place. [2024-06-14 12:03:49,121 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 117 selfloop transitions, 27 changer transitions 0/151 dead transitions. [2024-06-14 12:03:49,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 151 transitions, 1523 flow [2024-06-14 12:03:49,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:03:49,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:03:49,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 12:03:49,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 12:03:49,123 INFO L175 Difference]: Start difference. First operand has 113 places, 119 transitions, 1070 flow. Second operand 9 states and 153 transitions. [2024-06-14 12:03:49,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 151 transitions, 1523 flow [2024-06-14 12:03:49,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 151 transitions, 1437 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 12:03:49,204 INFO L231 Difference]: Finished difference. Result has 117 places, 127 transitions, 1168 flow [2024-06-14 12:03:49,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=986, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1168, PETRI_PLACES=117, PETRI_TRANSITIONS=127} [2024-06-14 12:03:49,205 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-14 12:03:49,205 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 127 transitions, 1168 flow [2024-06-14 12:03:49,205 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) [2024-06-14 12:03:49,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:49,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:49,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:03:49,206 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)] === [2024-06-14 12:03:49,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:49,206 INFO L85 PathProgramCache]: Analyzing trace with hash 450896947, now seen corresponding path program 4 times [2024-06-14 12:03:49,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:49,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859990138] [2024-06-14 12:03:49,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:49,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:49,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:50,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:50,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:50,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859990138] [2024-06-14 12:03:50,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859990138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:50,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:50,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:03:50,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508194867] [2024-06-14 12:03:50,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:50,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:03:50,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:50,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:03:50,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:03:50,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:03:50,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 127 transitions, 1168 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) [2024-06-14 12:03:50,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:50,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:03:50,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:51,149 INFO L124 PetriNetUnfolderBase]: 2408/3707 cut-off events. [2024-06-14 12:03:51,149 INFO L125 PetriNetUnfolderBase]: For 110060/110060 co-relation queries the response was YES. [2024-06-14 12:03:51,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23114 conditions, 3707 events. 2408/3707 cut-off events. For 110060/110060 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18697 event pairs, 726 based on Foata normal form. 4/3709 useless extension candidates. Maximal degree in co-relation 23061. Up to 3517 conditions per place. [2024-06-14 12:03:51,175 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 128 selfloop transitions, 18 changer transitions 0/153 dead transitions. [2024-06-14 12:03:51,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 153 transitions, 1576 flow [2024-06-14 12:03:51,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:03:51,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:03:51,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 12:03:51,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-14 12:03:51,176 INFO L175 Difference]: Start difference. First operand has 117 places, 127 transitions, 1168 flow. Second operand 8 states and 141 transitions. [2024-06-14 12:03:51,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 153 transitions, 1576 flow [2024-06-14 12:03:51,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 153 transitions, 1474 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 12:03:51,258 INFO L231 Difference]: Finished difference. Result has 119 places, 129 transitions, 1169 flow [2024-06-14 12:03:51,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1169, PETRI_PLACES=119, PETRI_TRANSITIONS=129} [2024-06-14 12:03:51,263 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-14 12:03:51,264 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 129 transitions, 1169 flow [2024-06-14 12:03:51,264 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) [2024-06-14 12:03:51,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:51,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:51,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:03:51,264 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:51,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:51,265 INFO L85 PathProgramCache]: Analyzing trace with hash -945167421, now seen corresponding path program 2 times [2024-06-14 12:03:51,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:51,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2965680] [2024-06-14 12:03:51,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:51,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:51,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:51,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:51,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:51,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2965680] [2024-06-14 12:03:51,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2965680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:51,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:51,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:03:51,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414026611] [2024-06-14 12:03:51,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:51,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:03:51,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:51,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:03:51,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:03:52,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:03:52,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 129 transitions, 1169 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) [2024-06-14 12:03:52,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:52,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:03:52,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:52,535 INFO L124 PetriNetUnfolderBase]: 2378/3665 cut-off events. [2024-06-14 12:03:52,535 INFO L125 PetriNetUnfolderBase]: For 115198/115205 co-relation queries the response was YES. [2024-06-14 12:03:52,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23072 conditions, 3665 events. 2378/3665 cut-off events. For 115198/115205 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 18627 event pairs, 777 based on Foata normal form. 4/3651 useless extension candidates. Maximal degree in co-relation 23018. Up to 3546 conditions per place. [2024-06-14 12:03:52,560 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 110 selfloop transitions, 12 changer transitions 0/137 dead transitions. [2024-06-14 12:03:52,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 137 transitions, 1433 flow [2024-06-14 12:03:52,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:03:52,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:03:52,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-14 12:03:52,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-14 12:03:52,561 INFO L175 Difference]: Start difference. First operand has 119 places, 129 transitions, 1169 flow. Second operand 6 states and 101 transitions. [2024-06-14 12:03:52,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 137 transitions, 1433 flow [2024-06-14 12:03:52,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 137 transitions, 1334 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 12:03:52,694 INFO L231 Difference]: Finished difference. Result has 119 places, 129 transitions, 1100 flow [2024-06-14 12:03:52,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1100, PETRI_PLACES=119, PETRI_TRANSITIONS=129} [2024-06-14 12:03:52,695 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-14 12:03:52,695 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 129 transitions, 1100 flow [2024-06-14 12:03:52,695 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) [2024-06-14 12:03:52,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:52,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:52,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:03:52,696 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:52,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:52,696 INFO L85 PathProgramCache]: Analyzing trace with hash -950875389, now seen corresponding path program 1 times [2024-06-14 12:03:52,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:52,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374561229] [2024-06-14 12:03:52,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:52,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:53,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:53,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:53,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374561229] [2024-06-14 12:03:53,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374561229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:53,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:53,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:03:53,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772561164] [2024-06-14 12:03:53,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:53,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:03:53,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:53,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:03:53,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:03:53,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:03:53,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 129 transitions, 1100 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:53,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:53,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:03:53,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:54,020 INFO L124 PetriNetUnfolderBase]: 2529/3828 cut-off events. [2024-06-14 12:03:54,021 INFO L125 PetriNetUnfolderBase]: For 119339/119339 co-relation queries the response was YES. [2024-06-14 12:03:54,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23993 conditions, 3828 events. 2529/3828 cut-off events. For 119339/119339 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18803 event pairs, 792 based on Foata normal form. 1/3827 useless extension candidates. Maximal degree in co-relation 23938. Up to 3796 conditions per place. [2024-06-14 12:03:54,048 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 127 selfloop transitions, 17 changer transitions 0/147 dead transitions. [2024-06-14 12:03:54,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 147 transitions, 1528 flow [2024-06-14 12:03:54,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:03:54,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:03:54,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-14 12:03:54,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 12:03:54,049 INFO L175 Difference]: Start difference. First operand has 119 places, 129 transitions, 1100 flow. Second operand 6 states and 102 transitions. [2024-06-14 12:03:54,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 147 transitions, 1528 flow [2024-06-14 12:03:54,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 147 transitions, 1491 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 12:03:54,174 INFO L231 Difference]: Finished difference. Result has 120 places, 135 transitions, 1161 flow [2024-06-14 12:03:54,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1063, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1161, PETRI_PLACES=120, PETRI_TRANSITIONS=135} [2024-06-14 12:03:54,175 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-14 12:03:54,175 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 135 transitions, 1161 flow [2024-06-14 12:03:54,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:54,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:54,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:54,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:03:54,176 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:54,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:54,176 INFO L85 PathProgramCache]: Analyzing trace with hash 342703461, now seen corresponding path program 2 times [2024-06-14 12:03:54,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:54,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041035414] [2024-06-14 12:03:54,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:54,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:54,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:54,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:54,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:54,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041035414] [2024-06-14 12:03:54,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041035414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:54,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:54,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:03:54,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783111941] [2024-06-14 12:03:54,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:54,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:03:54,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:54,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:03:54,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:03:54,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:03:54,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 135 transitions, 1161 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:54,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:54,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:03:54,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:55,622 INFO L124 PetriNetUnfolderBase]: 2526/3825 cut-off events. [2024-06-14 12:03:55,623 INFO L125 PetriNetUnfolderBase]: For 126543/126545 co-relation queries the response was YES. [2024-06-14 12:03:55,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24539 conditions, 3825 events. 2526/3825 cut-off events. For 126543/126545 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18832 event pairs, 795 based on Foata normal form. 3/3826 useless extension candidates. Maximal degree in co-relation 24483. Up to 3793 conditions per place. [2024-06-14 12:03:55,661 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 123 selfloop transitions, 17 changer transitions 0/143 dead transitions. [2024-06-14 12:03:55,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 143 transitions, 1461 flow [2024-06-14 12:03:55,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:03:55,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:03:55,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-14 12:03:55,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-14 12:03:55,662 INFO L175 Difference]: Start difference. First operand has 120 places, 135 transitions, 1161 flow. Second operand 6 states and 98 transitions. [2024-06-14 12:03:55,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 143 transitions, 1461 flow [2024-06-14 12:03:55,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 143 transitions, 1414 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-14 12:03:55,805 INFO L231 Difference]: Finished difference. Result has 124 places, 135 transitions, 1154 flow [2024-06-14 12:03:55,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1154, PETRI_PLACES=124, PETRI_TRANSITIONS=135} [2024-06-14 12:03:55,805 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-14 12:03:55,806 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 135 transitions, 1154 flow [2024-06-14 12:03:55,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:03:55,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:55,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:55,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:03:55,807 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)] === [2024-06-14 12:03:55,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:55,807 INFO L85 PathProgramCache]: Analyzing trace with hash -353066701, now seen corresponding path program 1 times [2024-06-14 12:03:55,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:55,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001461976] [2024-06-14 12:03:55,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:55,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:56,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:56,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:56,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001461976] [2024-06-14 12:03:56,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001461976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:56,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:56,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:03:56,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221895933] [2024-06-14 12:03:56,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:56,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:03:56,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:56,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:03:56,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:03:57,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:03:57,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 135 transitions, 1154 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) [2024-06-14 12:03:57,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:57,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:03:57,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:57,726 INFO L124 PetriNetUnfolderBase]: 2440/3749 cut-off events. [2024-06-14 12:03:57,726 INFO L125 PetriNetUnfolderBase]: For 136615/136617 co-relation queries the response was YES. [2024-06-14 12:03:57,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24299 conditions, 3749 events. 2440/3749 cut-off events. For 136615/136617 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 18971 event pairs, 638 based on Foata normal form. 4/3743 useless extension candidates. Maximal degree in co-relation 24241. Up to 3310 conditions per place. [2024-06-14 12:03:57,751 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 122 selfloop transitions, 48 changer transitions 0/179 dead transitions. [2024-06-14 12:03:57,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 179 transitions, 1744 flow [2024-06-14 12:03:57,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:03:57,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:03:57,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:03:57,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-14 12:03:57,753 INFO L175 Difference]: Start difference. First operand has 124 places, 135 transitions, 1154 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:03:57,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 179 transitions, 1744 flow [2024-06-14 12:03:57,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 179 transitions, 1698 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 12:03:57,911 INFO L231 Difference]: Finished difference. Result has 129 places, 145 transitions, 1392 flow [2024-06-14 12:03:57,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1108, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1392, PETRI_PLACES=129, PETRI_TRANSITIONS=145} [2024-06-14 12:03:57,911 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-14 12:03:57,912 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 145 transitions, 1392 flow [2024-06-14 12:03:57,912 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) [2024-06-14 12:03:57,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:57,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:57,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:03:57,913 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:57,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:57,913 INFO L85 PathProgramCache]: Analyzing trace with hash 410319293, now seen corresponding path program 1 times [2024-06-14 12:03:57,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:57,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983542415] [2024-06-14 12:03:57,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:57,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:58,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:58,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:58,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983542415] [2024-06-14 12:03:58,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983542415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:58,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:58,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:03:58,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507118366] [2024-06-14 12:03:58,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:58,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:03:58,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:58,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:03:58,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:03:58,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:03:58,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 145 transitions, 1392 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) [2024-06-14 12:03:58,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:58,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:03:58,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:59,143 INFO L124 PetriNetUnfolderBase]: 2426/3737 cut-off events. [2024-06-14 12:03:59,143 INFO L125 PetriNetUnfolderBase]: For 149947/149978 co-relation queries the response was YES. [2024-06-14 12:03:59,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25241 conditions, 3737 events. 2426/3737 cut-off events. For 149947/149978 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 19041 event pairs, 737 based on Foata normal form. 8/3717 useless extension candidates. Maximal degree in co-relation 25181. Up to 3549 conditions per place. [2024-06-14 12:03:59,181 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 133 selfloop transitions, 26 changer transitions 0/174 dead transitions. [2024-06-14 12:03:59,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 174 transitions, 1902 flow [2024-06-14 12:03:59,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:03:59,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:03:59,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 12:03:59,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-14 12:03:59,183 INFO L175 Difference]: Start difference. First operand has 129 places, 145 transitions, 1392 flow. Second operand 7 states and 129 transitions. [2024-06-14 12:03:59,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 174 transitions, 1902 flow [2024-06-14 12:03:59,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 174 transitions, 1759 flow, removed 56 selfloop flow, removed 3 redundant places. [2024-06-14 12:03:59,447 INFO L231 Difference]: Finished difference. Result has 134 places, 154 transitions, 1406 flow [2024-06-14 12:03:59,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1249, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1406, PETRI_PLACES=134, PETRI_TRANSITIONS=154} [2024-06-14 12:03:59,447 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-14 12:03:59,447 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 154 transitions, 1406 flow [2024-06-14 12:03:59,448 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) [2024-06-14 12:03:59,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:59,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:59,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:03:59,448 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:59,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:59,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1083707699, now seen corresponding path program 2 times [2024-06-14 12:03:59,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:59,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671648133] [2024-06-14 12:03:59,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:59,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:59,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:00,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:00,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:00,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671648133] [2024-06-14 12:04:00,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671648133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:00,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:00,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:04:00,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392555930] [2024-06-14 12:04:00,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:00,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:04:00,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:00,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:04:00,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:04:00,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:04:00,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 154 transitions, 1406 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) [2024-06-14 12:04:00,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:00,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:04:00,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:01,557 INFO L124 PetriNetUnfolderBase]: 2554/3920 cut-off events. [2024-06-14 12:04:01,558 INFO L125 PetriNetUnfolderBase]: For 159173/159173 co-relation queries the response was YES. [2024-06-14 12:04:01,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26831 conditions, 3920 events. 2554/3920 cut-off events. For 159173/159173 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 19926 event pairs, 746 based on Foata normal form. 4/3922 useless extension candidates. Maximal degree in co-relation 26768. Up to 3625 conditions per place. [2024-06-14 12:04:01,589 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 150 selfloop transitions, 31 changer transitions 0/190 dead transitions. [2024-06-14 12:04:01,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 190 transitions, 2116 flow [2024-06-14 12:04:01,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:04:01,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:04:01,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:04:01,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:04:01,592 INFO L175 Difference]: Start difference. First operand has 134 places, 154 transitions, 1406 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:04:01,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 190 transitions, 2116 flow [2024-06-14 12:04:01,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 190 transitions, 2077 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-14 12:04:01,771 INFO L231 Difference]: Finished difference. Result has 142 places, 159 transitions, 1603 flow [2024-06-14 12:04:01,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1367, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1603, PETRI_PLACES=142, PETRI_TRANSITIONS=159} [2024-06-14 12:04:01,772 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-14 12:04:01,772 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 159 transitions, 1603 flow [2024-06-14 12:04:01,772 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) [2024-06-14 12:04:01,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:01,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:01,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:04:01,773 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)] === [2024-06-14 12:04:01,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:01,773 INFO L85 PathProgramCache]: Analyzing trace with hash 576851989, now seen corresponding path program 3 times [2024-06-14 12:04:01,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:01,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876673624] [2024-06-14 12:04:01,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:01,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:02,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:02,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:02,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876673624] [2024-06-14 12:04:02,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876673624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:02,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:02,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:04:02,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165525267] [2024-06-14 12:04:02,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:02,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:04:02,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:02,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:04:02,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:04:02,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:04:02,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 159 transitions, 1603 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) [2024-06-14 12:04:02,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:02,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:04:02,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:03,778 INFO L124 PetriNetUnfolderBase]: 2571/3947 cut-off events. [2024-06-14 12:04:03,778 INFO L125 PetriNetUnfolderBase]: For 169892/169892 co-relation queries the response was YES. [2024-06-14 12:04:03,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27548 conditions, 3947 events. 2571/3947 cut-off events. For 169892/169892 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 20082 event pairs, 741 based on Foata normal form. 4/3949 useless extension candidates. Maximal degree in co-relation 27481. Up to 3644 conditions per place. [2024-06-14 12:04:03,812 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 155 selfloop transitions, 32 changer transitions 0/196 dead transitions. [2024-06-14 12:04:03,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 196 transitions, 2193 flow [2024-06-14 12:04:03,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:04:03,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:04:03,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 12:04:03,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-14 12:04:03,822 INFO L175 Difference]: Start difference. First operand has 142 places, 159 transitions, 1603 flow. Second operand 9 states and 163 transitions. [2024-06-14 12:04:03,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 196 transitions, 2193 flow [2024-06-14 12:04:03,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 196 transitions, 2082 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-14 12:04:03,959 INFO L231 Difference]: Finished difference. Result has 148 places, 166 transitions, 1727 flow [2024-06-14 12:04:03,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1492, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1727, PETRI_PLACES=148, PETRI_TRANSITIONS=166} [2024-06-14 12:04:03,960 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-14 12:04:03,960 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 166 transitions, 1727 flow [2024-06-14 12:04:03,960 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) [2024-06-14 12:04:03,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:03,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:03,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:04:03,960 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)] === [2024-06-14 12:04:03,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:03,961 INFO L85 PathProgramCache]: Analyzing trace with hash 551096233, now seen corresponding path program 4 times [2024-06-14 12:04:03,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:03,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398578770] [2024-06-14 12:04:03,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:03,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:03,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:05,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:05,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:05,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398578770] [2024-06-14 12:04:05,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398578770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:05,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:05,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:04:05,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39160159] [2024-06-14 12:04:05,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:05,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:04:05,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:05,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:04:05,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:04:05,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:04:05,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 166 transitions, 1727 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) [2024-06-14 12:04:05,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:05,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:04:05,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:06,364 INFO L124 PetriNetUnfolderBase]: 2563/3935 cut-off events. [2024-06-14 12:04:06,364 INFO L125 PetriNetUnfolderBase]: For 176512/176512 co-relation queries the response was YES. [2024-06-14 12:04:06,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27843 conditions, 3935 events. 2563/3935 cut-off events. For 176512/176512 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 20039 event pairs, 739 based on Foata normal form. 4/3937 useless extension candidates. Maximal degree in co-relation 27772. Up to 3692 conditions per place. [2024-06-14 12:04:06,393 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 157 selfloop transitions, 29 changer transitions 0/195 dead transitions. [2024-06-14 12:04:06,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 195 transitions, 2175 flow [2024-06-14 12:04:06,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:04:06,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:04:06,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 12:04:06,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-14 12:04:06,394 INFO L175 Difference]: Start difference. First operand has 148 places, 166 transitions, 1727 flow. Second operand 9 states and 159 transitions. [2024-06-14 12:04:06,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 195 transitions, 2175 flow [2024-06-14 12:04:06,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 195 transitions, 1994 flow, removed 84 selfloop flow, removed 3 redundant places. [2024-06-14 12:04:06,620 INFO L231 Difference]: Finished difference. Result has 154 places, 166 transitions, 1613 flow [2024-06-14 12:04:06,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1546, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1613, PETRI_PLACES=154, PETRI_TRANSITIONS=166} [2024-06-14 12:04:06,621 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-14 12:04:06,621 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 166 transitions, 1613 flow [2024-06-14 12:04:06,622 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) [2024-06-14 12:04:06,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:06,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:06,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:04:06,622 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)] === [2024-06-14 12:04:06,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:06,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1083700042, now seen corresponding path program 1 times [2024-06-14 12:04:06,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:06,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874145698] [2024-06-14 12:04:06,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:06,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:06,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:08,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:08,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:08,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874145698] [2024-06-14 12:04:08,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874145698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:08,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:08,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:04:08,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872072262] [2024-06-14 12:04:08,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:08,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:04:08,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:08,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:04:08,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:04:08,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:04:08,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 166 transitions, 1613 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) [2024-06-14 12:04:08,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:08,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:04:08,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:09,241 INFO L124 PetriNetUnfolderBase]: 2580/3960 cut-off events. [2024-06-14 12:04:09,241 INFO L125 PetriNetUnfolderBase]: For 179194/179194 co-relation queries the response was YES. [2024-06-14 12:04:09,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27566 conditions, 3960 events. 2580/3960 cut-off events. For 179194/179194 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 20148 event pairs, 737 based on Foata normal form. 2/3960 useless extension candidates. Maximal degree in co-relation 27493. Up to 3721 conditions per place. [2024-06-14 12:04:09,275 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 160 selfloop transitions, 32 changer transitions 0/201 dead transitions. [2024-06-14 12:04:09,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 201 transitions, 2173 flow [2024-06-14 12:04:09,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:04:09,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:04:09,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 12:04:09,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-14 12:04:09,277 INFO L175 Difference]: Start difference. First operand has 154 places, 166 transitions, 1613 flow. Second operand 9 states and 160 transitions. [2024-06-14 12:04:09,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 201 transitions, 2173 flow [2024-06-14 12:04:09,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 201 transitions, 2107 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 12:04:09,416 INFO L231 Difference]: Finished difference. Result has 155 places, 172 transitions, 1733 flow [2024-06-14 12:04:09,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1547, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1733, PETRI_PLACES=155, PETRI_TRANSITIONS=172} [2024-06-14 12:04:09,416 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-14 12:04:09,416 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 172 transitions, 1733 flow [2024-06-14 12:04:09,416 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) [2024-06-14 12:04:09,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:09,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:09,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:04:09,417 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)] === [2024-06-14 12:04:09,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:09,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1741412445, now seen corresponding path program 5 times [2024-06-14 12:04:09,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:09,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495671389] [2024-06-14 12:04:09,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:09,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:10,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:10,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:10,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495671389] [2024-06-14 12:04:10,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495671389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:10,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:10,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:04:10,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210070467] [2024-06-14 12:04:10,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:10,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:04:10,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:10,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:04:10,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:04:10,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:04:10,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 172 transitions, 1733 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) [2024-06-14 12:04:10,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:10,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:04:10,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:11,691 INFO L124 PetriNetUnfolderBase]: 2572/3948 cut-off events. [2024-06-14 12:04:11,691 INFO L125 PetriNetUnfolderBase]: For 187938/187938 co-relation queries the response was YES. [2024-06-14 12:04:11,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27906 conditions, 3948 events. 2572/3948 cut-off events. For 187938/187938 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 20014 event pairs, 709 based on Foata normal form. 4/3950 useless extension candidates. Maximal degree in co-relation 27832. Up to 3736 conditions per place. [2024-06-14 12:04:11,722 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 174 selfloop transitions, 20 changer transitions 0/203 dead transitions. [2024-06-14 12:04:11,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 203 transitions, 2267 flow [2024-06-14 12:04:11,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:04:11,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:04:11,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 12:04:11,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-14 12:04:11,725 INFO L175 Difference]: Start difference. First operand has 155 places, 172 transitions, 1733 flow. Second operand 9 states and 157 transitions. [2024-06-14 12:04:11,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 203 transitions, 2267 flow [2024-06-14 12:04:11,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 203 transitions, 2141 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-14 12:04:11,918 INFO L231 Difference]: Finished difference. Result has 157 places, 174 transitions, 1732 flow [2024-06-14 12:04:11,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1607, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1732, PETRI_PLACES=157, PETRI_TRANSITIONS=174} [2024-06-14 12:04:11,918 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-14 12:04:11,919 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 174 transitions, 1732 flow [2024-06-14 12:04:11,919 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) [2024-06-14 12:04:11,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:11,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:11,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:04:11,919 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:11,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:11,920 INFO L85 PathProgramCache]: Analyzing trace with hash 759646229, now seen corresponding path program 2 times [2024-06-14 12:04:11,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:11,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763164394] [2024-06-14 12:04:11,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:11,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:12,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:12,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:12,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763164394] [2024-06-14 12:04:12,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763164394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:12,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:12,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:04:12,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983092127] [2024-06-14 12:04:12,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:12,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:04:12,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:12,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:04:12,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:04:12,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:04:12,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 174 transitions, 1732 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) [2024-06-14 12:04:12,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:12,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:04:12,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:13,436 INFO L124 PetriNetUnfolderBase]: 2488/3839 cut-off events. [2024-06-14 12:04:13,436 INFO L125 PetriNetUnfolderBase]: For 198878/198933 co-relation queries the response was YES. [2024-06-14 12:04:13,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27545 conditions, 3839 events. 2488/3839 cut-off events. For 198878/198933 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 19717 event pairs, 745 based on Foata normal form. 6/3811 useless extension candidates. Maximal degree in co-relation 27470. Up to 3704 conditions per place. [2024-06-14 12:04:13,472 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 158 selfloop transitions, 15 changer transitions 0/188 dead transitions. [2024-06-14 12:04:13,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 188 transitions, 2146 flow [2024-06-14 12:04:13,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:04:13,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:04:13,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 12:04:13,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-14 12:04:13,473 INFO L175 Difference]: Start difference. First operand has 157 places, 174 transitions, 1732 flow. Second operand 7 states and 116 transitions. [2024-06-14 12:04:13,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 188 transitions, 2146 flow [2024-06-14 12:04:13,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 188 transitions, 2039 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-14 12:04:13,681 INFO L231 Difference]: Finished difference. Result has 157 places, 177 transitions, 1707 flow [2024-06-14 12:04:13,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1625, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1707, PETRI_PLACES=157, PETRI_TRANSITIONS=177} [2024-06-14 12:04:13,681 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-14 12:04:13,681 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 177 transitions, 1707 flow [2024-06-14 12:04:13,681 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) [2024-06-14 12:04:13,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:13,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:13,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:04:13,682 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:13,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:13,682 INFO L85 PathProgramCache]: Analyzing trace with hash 764582333, now seen corresponding path program 3 times [2024-06-14 12:04:13,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:13,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211174782] [2024-06-14 12:04:13,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:13,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:14,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:14,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:14,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211174782] [2024-06-14 12:04:14,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211174782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:14,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:14,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:04:14,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867316519] [2024-06-14 12:04:14,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:14,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:04:14,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:14,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:04:14,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:04:14,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:04:14,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 177 transitions, 1707 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) [2024-06-14 12:04:14,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:14,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:04:14,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:15,102 INFO L124 PetriNetUnfolderBase]: 2476/3821 cut-off events. [2024-06-14 12:04:15,103 INFO L125 PetriNetUnfolderBase]: For 201382/201421 co-relation queries the response was YES. [2024-06-14 12:04:15,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27231 conditions, 3821 events. 2476/3821 cut-off events. For 201382/201421 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 19606 event pairs, 735 based on Foata normal form. 5/3795 useless extension candidates. Maximal degree in co-relation 27155. Up to 3677 conditions per place. [2024-06-14 12:04:15,138 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 155 selfloop transitions, 20 changer transitions 0/190 dead transitions. [2024-06-14 12:04:15,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 190 transitions, 2091 flow [2024-06-14 12:04:15,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:04:15,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:04:15,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 12:04:15,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-14 12:04:15,140 INFO L175 Difference]: Start difference. First operand has 157 places, 177 transitions, 1707 flow. Second operand 7 states and 120 transitions. [2024-06-14 12:04:15,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 190 transitions, 2091 flow [2024-06-14 12:04:15,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 190 transitions, 2016 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 12:04:15,323 INFO L231 Difference]: Finished difference. Result has 159 places, 177 transitions, 1678 flow [2024-06-14 12:04:15,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1632, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1678, PETRI_PLACES=159, PETRI_TRANSITIONS=177} [2024-06-14 12:04:15,332 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-14 12:04:15,332 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 177 transitions, 1678 flow [2024-06-14 12:04:15,332 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) [2024-06-14 12:04:15,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:15,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:15,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:04:15,333 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:15,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:15,333 INFO L85 PathProgramCache]: Analyzing trace with hash 794878945, now seen corresponding path program 1 times [2024-06-14 12:04:15,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:15,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623315971] [2024-06-14 12:04:15,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:15,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:15,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:15,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:15,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623315971] [2024-06-14 12:04:15,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623315971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:15,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:15,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:04:15,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187110377] [2024-06-14 12:04:15,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:15,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:04:15,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:15,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:04:15,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:04:16,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:04:16,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 177 transitions, 1678 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:16,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:16,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:04:16,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:16,837 INFO L124 PetriNetUnfolderBase]: 2704/4090 cut-off events. [2024-06-14 12:04:16,837 INFO L125 PetriNetUnfolderBase]: For 206872/206872 co-relation queries the response was YES. [2024-06-14 12:04:16,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28828 conditions, 4090 events. 2704/4090 cut-off events. For 206872/206872 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 20377 event pairs, 771 based on Foata normal form. 2/4090 useless extension candidates. Maximal degree in co-relation 28752. Up to 4042 conditions per place. [2024-06-14 12:04:16,876 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 176 selfloop transitions, 17 changer transitions 0/196 dead transitions. [2024-06-14 12:04:16,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 196 transitions, 2150 flow [2024-06-14 12:04:16,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:04:16,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:04:16,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 12:04:16,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-14 12:04:16,877 INFO L175 Difference]: Start difference. First operand has 159 places, 177 transitions, 1678 flow. Second operand 7 states and 116 transitions. [2024-06-14 12:04:16,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 196 transitions, 2150 flow [2024-06-14 12:04:17,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 196 transitions, 2079 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 12:04:17,134 INFO L231 Difference]: Finished difference. Result has 160 places, 180 transitions, 1698 flow [2024-06-14 12:04:17,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1607, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1698, PETRI_PLACES=160, PETRI_TRANSITIONS=180} [2024-06-14 12:04:17,135 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-14 12:04:17,135 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 180 transitions, 1698 flow [2024-06-14 12:04:17,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:17,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:17,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:17,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:04:17,135 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:17,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:17,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1833505325, now seen corresponding path program 2 times [2024-06-14 12:04:17,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:17,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748142012] [2024-06-14 12:04:17,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:17,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:17,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:17,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:17,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:17,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748142012] [2024-06-14 12:04:17,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748142012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:17,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:17,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:04:17,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552496783] [2024-06-14 12:04:17,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:17,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:04:17,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:17,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:04:17,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:04:17,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:04:17,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 180 transitions, 1698 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:17,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:17,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:04:17,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:18,525 INFO L124 PetriNetUnfolderBase]: 2714/4104 cut-off events. [2024-06-14 12:04:18,525 INFO L125 PetriNetUnfolderBase]: For 216088/216088 co-relation queries the response was YES. [2024-06-14 12:04:18,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29400 conditions, 4104 events. 2714/4104 cut-off events. For 216088/216088 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 20442 event pairs, 782 based on Foata normal form. 2/4104 useless extension candidates. Maximal degree in co-relation 29323. Up to 4032 conditions per place. [2024-06-14 12:04:18,563 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 170 selfloop transitions, 29 changer transitions 0/202 dead transitions. [2024-06-14 12:04:18,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 202 transitions, 2322 flow [2024-06-14 12:04:18,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:04:18,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:04:18,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 12:04:18,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 12:04:18,564 INFO L175 Difference]: Start difference. First operand has 160 places, 180 transitions, 1698 flow. Second operand 7 states and 119 transitions. [2024-06-14 12:04:18,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 202 transitions, 2322 flow [2024-06-14 12:04:18,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 202 transitions, 2255 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 12:04:18,835 INFO L231 Difference]: Finished difference. Result has 162 places, 186 transitions, 1801 flow [2024-06-14 12:04:18,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1631, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1801, PETRI_PLACES=162, PETRI_TRANSITIONS=186} [2024-06-14 12:04:18,835 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-14 12:04:18,835 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 186 transitions, 1801 flow [2024-06-14 12:04:18,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:18,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:18,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:18,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:04:18,836 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:18,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:18,836 INFO L85 PathProgramCache]: Analyzing trace with hash 794999101, now seen corresponding path program 1 times [2024-06-14 12:04:18,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:18,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353455000] [2024-06-14 12:04:18,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:18,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:18,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:19,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:19,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:19,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353455000] [2024-06-14 12:04:19,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353455000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:19,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:19,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:04:19,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085121775] [2024-06-14 12:04:19,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:19,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:04:19,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:19,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:04:19,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:04:19,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:04:19,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 186 transitions, 1801 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:19,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:19,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:04:19,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:20,411 INFO L124 PetriNetUnfolderBase]: 2729/4125 cut-off events. [2024-06-14 12:04:20,411 INFO L125 PetriNetUnfolderBase]: For 228252/228252 co-relation queries the response was YES. [2024-06-14 12:04:20,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30058 conditions, 4125 events. 2729/4125 cut-off events. For 228252/228252 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 20545 event pairs, 778 based on Foata normal form. 3/4126 useless extension candidates. Maximal degree in co-relation 29980. Up to 4056 conditions per place. [2024-06-14 12:04:20,447 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 181 selfloop transitions, 26 changer transitions 0/210 dead transitions. [2024-06-14 12:04:20,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 210 transitions, 2409 flow [2024-06-14 12:04:20,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:04:20,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:04:20,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 12:04:20,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-14 12:04:20,449 INFO L175 Difference]: Start difference. First operand has 162 places, 186 transitions, 1801 flow. Second operand 7 states and 122 transitions. [2024-06-14 12:04:20,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 210 transitions, 2409 flow [2024-06-14 12:04:20,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 210 transitions, 2343 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-14 12:04:20,691 INFO L231 Difference]: Finished difference. Result has 166 places, 192 transitions, 1863 flow [2024-06-14 12:04:20,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1735, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1863, PETRI_PLACES=166, PETRI_TRANSITIONS=192} [2024-06-14 12:04:20,691 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-14 12:04:20,691 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 192 transitions, 1863 flow [2024-06-14 12:04:20,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:20,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:20,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:20,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:04:20,692 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:20,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:20,692 INFO L85 PathProgramCache]: Analyzing trace with hash 2087505475, now seen corresponding path program 3 times [2024-06-14 12:04:20,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:20,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845694604] [2024-06-14 12:04:20,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:20,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:20,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:21,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:21,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:21,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845694604] [2024-06-14 12:04:21,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845694604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:21,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:21,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:04:21,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001255367] [2024-06-14 12:04:21,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:21,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:04:21,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:21,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:04:21,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:04:21,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:04:21,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 192 transitions, 1863 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:21,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:21,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:04:21,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:22,166 INFO L124 PetriNetUnfolderBase]: 2723/4118 cut-off events. [2024-06-14 12:04:22,166 INFO L125 PetriNetUnfolderBase]: For 235704/235706 co-relation queries the response was YES. [2024-06-14 12:04:22,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30495 conditions, 4118 events. 2723/4118 cut-off events. For 235704/235706 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 20532 event pairs, 782 based on Foata normal form. 2/4118 useless extension candidates. Maximal degree in co-relation 30415. Up to 4048 conditions per place. [2024-06-14 12:04:22,197 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 171 selfloop transitions, 29 changer transitions 0/203 dead transitions. [2024-06-14 12:04:22,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 203 transitions, 2293 flow [2024-06-14 12:04:22,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:04:22,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:04:22,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-14 12:04:22,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-14 12:04:22,199 INFO L175 Difference]: Start difference. First operand has 166 places, 192 transitions, 1863 flow. Second operand 7 states and 115 transitions. [2024-06-14 12:04:22,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 203 transitions, 2293 flow [2024-06-14 12:04:22,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 203 transitions, 2216 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-14 12:04:22,445 INFO L231 Difference]: Finished difference. Result has 170 places, 192 transitions, 1850 flow [2024-06-14 12:04:22,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1786, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1850, PETRI_PLACES=170, PETRI_TRANSITIONS=192} [2024-06-14 12:04:22,445 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-14 12:04:22,446 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 192 transitions, 1850 flow [2024-06-14 12:04:22,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:22,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:22,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:22,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 12:04:22,446 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:22,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:22,447 INFO L85 PathProgramCache]: Analyzing trace with hash 759652181, now seen corresponding path program 2 times [2024-06-14 12:04:22,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:22,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723524862] [2024-06-14 12:04:22,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:22,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:23,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:23,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:23,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723524862] [2024-06-14 12:04:23,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723524862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:23,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:23,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:04:23,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531616710] [2024-06-14 12:04:23,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:23,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:04:23,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:23,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:04:23,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:04:23,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:04:23,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 192 transitions, 1850 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:23,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:23,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:04:23,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:23,825 INFO L124 PetriNetUnfolderBase]: 2738/4139 cut-off events. [2024-06-14 12:04:23,826 INFO L125 PetriNetUnfolderBase]: For 245297/245299 co-relation queries the response was YES. [2024-06-14 12:04:23,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30781 conditions, 4139 events. 2738/4139 cut-off events. For 245297/245299 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 20706 event pairs, 767 based on Foata normal form. 5/4142 useless extension candidates. Maximal degree in co-relation 30699. Up to 4062 conditions per place. [2024-06-14 12:04:23,865 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 176 selfloop transitions, 30 changer transitions 0/209 dead transitions. [2024-06-14 12:04:23,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 209 transitions, 2418 flow [2024-06-14 12:04:23,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:04:23,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:04:23,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 12:04:23,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-14 12:04:23,867 INFO L175 Difference]: Start difference. First operand has 170 places, 192 transitions, 1850 flow. Second operand 7 states and 116 transitions. [2024-06-14 12:04:23,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 209 transitions, 2418 flow [2024-06-14 12:04:24,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 209 transitions, 2338 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 12:04:24,100 INFO L231 Difference]: Finished difference. Result has 171 places, 195 transitions, 1869 flow [2024-06-14 12:04:24,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1770, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1869, PETRI_PLACES=171, PETRI_TRANSITIONS=195} [2024-06-14 12:04:24,101 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-14 12:04:24,101 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 195 transitions, 1869 flow [2024-06-14 12:04:24,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:24,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:24,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:24,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 12:04:24,101 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:24,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:24,102 INFO L85 PathProgramCache]: Analyzing trace with hash 759415031, now seen corresponding path program 3 times [2024-06-14 12:04:24,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:24,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157256523] [2024-06-14 12:04:24,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:24,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:24,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:24,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:24,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157256523] [2024-06-14 12:04:24,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157256523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:24,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:24,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:04:24,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511475584] [2024-06-14 12:04:24,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:24,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:04:24,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:24,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:04:24,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:04:24,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:04:24,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 195 transitions, 1869 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:24,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:24,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:04:24,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:25,673 INFO L124 PetriNetUnfolderBase]: 2729/4127 cut-off events. [2024-06-14 12:04:25,674 INFO L125 PetriNetUnfolderBase]: For 251658/251660 co-relation queries the response was YES. [2024-06-14 12:04:25,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30803 conditions, 4127 events. 2729/4127 cut-off events. For 251658/251660 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 20649 event pairs, 775 based on Foata normal form. 5/4130 useless extension candidates. Maximal degree in co-relation 30720. Up to 4055 conditions per place. [2024-06-14 12:04:25,722 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 178 selfloop transitions, 29 changer transitions 0/210 dead transitions. [2024-06-14 12:04:25,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 210 transitions, 2323 flow [2024-06-14 12:04:25,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:04:25,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:04:25,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 12:04:25,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-14 12:04:25,724 INFO L175 Difference]: Start difference. First operand has 171 places, 195 transitions, 1869 flow. Second operand 7 states and 118 transitions. [2024-06-14 12:04:25,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 210 transitions, 2323 flow [2024-06-14 12:04:25,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 210 transitions, 2242 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 12:04:25,947 INFO L231 Difference]: Finished difference. Result has 174 places, 195 transitions, 1852 flow [2024-06-14 12:04:25,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1788, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1852, PETRI_PLACES=174, PETRI_TRANSITIONS=195} [2024-06-14 12:04:25,947 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-14 12:04:25,947 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 195 transitions, 1852 flow [2024-06-14 12:04:25,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:25,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:25,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:25,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 12:04:25,948 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)] === [2024-06-14 12:04:25,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:25,948 INFO L85 PathProgramCache]: Analyzing trace with hash -165340796, now seen corresponding path program 1 times [2024-06-14 12:04:25,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:25,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704406428] [2024-06-14 12:04:25,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:25,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:26,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:26,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:26,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704406428] [2024-06-14 12:04:26,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704406428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:26,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:26,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:04:26,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704791425] [2024-06-14 12:04:26,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:26,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:04:26,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:26,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:04:26,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:04:26,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:04:26,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 195 transitions, 1852 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:26,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:26,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:04:26,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:27,716 INFO L124 PetriNetUnfolderBase]: 2739/4140 cut-off events. [2024-06-14 12:04:27,716 INFO L125 PetriNetUnfolderBase]: For 258709/258709 co-relation queries the response was YES. [2024-06-14 12:04:27,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31007 conditions, 4140 events. 2739/4140 cut-off events. For 258709/258709 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 20690 event pairs, 763 based on Foata normal form. 1/4139 useless extension candidates. Maximal degree in co-relation 30923. Up to 4053 conditions per place. [2024-06-14 12:04:27,762 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 200 selfloop transitions, 36 changer transitions 0/239 dead transitions. [2024-06-14 12:04:27,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 239 transitions, 2641 flow [2024-06-14 12:04:27,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:04:27,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:04:27,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 12:04:27,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-14 12:04:27,763 INFO L175 Difference]: Start difference. First operand has 174 places, 195 transitions, 1852 flow. Second operand 9 states and 155 transitions. [2024-06-14 12:04:27,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 239 transitions, 2641 flow [2024-06-14 12:04:28,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 239 transitions, 2558 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 12:04:28,029 INFO L231 Difference]: Finished difference. Result has 177 places, 209 transitions, 2009 flow [2024-06-14 12:04:28,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1769, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2009, PETRI_PLACES=177, PETRI_TRANSITIONS=209} [2024-06-14 12:04:28,030 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-14 12:04:28,030 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 209 transitions, 2009 flow [2024-06-14 12:04:28,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:28,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:28,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:28,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 12:04:28,031 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:28,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:28,031 INFO L85 PathProgramCache]: Analyzing trace with hash -170724318, now seen corresponding path program 1 times [2024-06-14 12:04:28,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:28,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031790545] [2024-06-14 12:04:28,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:28,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:28,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:28,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:28,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031790545] [2024-06-14 12:04:28,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031790545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:28,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:28,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:04:28,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560796912] [2024-06-14 12:04:28,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:28,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:04:28,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:28,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:04:28,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:04:28,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:04:28,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 209 transitions, 2009 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:28,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:28,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:04:28,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:29,496 INFO L124 PetriNetUnfolderBase]: 2752/4159 cut-off events. [2024-06-14 12:04:29,496 INFO L125 PetriNetUnfolderBase]: For 271917/271919 co-relation queries the response was YES. [2024-06-14 12:04:29,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31864 conditions, 4159 events. 2752/4159 cut-off events. For 271917/271919 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 20822 event pairs, 768 based on Foata normal form. 3/4160 useless extension candidates. Maximal degree in co-relation 31778. Up to 4071 conditions per place. [2024-06-14 12:04:29,537 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 200 selfloop transitions, 35 changer transitions 0/238 dead transitions. [2024-06-14 12:04:29,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 238 transitions, 2839 flow [2024-06-14 12:04:29,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:04:29,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:04:29,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 12:04:29,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-14 12:04:29,539 INFO L175 Difference]: Start difference. First operand has 177 places, 209 transitions, 2009 flow. Second operand 7 states and 124 transitions. [2024-06-14 12:04:29,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 238 transitions, 2839 flow [2024-06-14 12:04:29,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 238 transitions, 2774 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-14 12:04:29,885 INFO L231 Difference]: Finished difference. Result has 182 places, 218 transitions, 2146 flow [2024-06-14 12:04:29,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1944, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2146, PETRI_PLACES=182, PETRI_TRANSITIONS=218} [2024-06-14 12:04:29,886 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-14 12:04:29,886 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 218 transitions, 2146 flow [2024-06-14 12:04:29,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:29,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:29,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:29,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 12:04:29,886 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:29,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:29,887 INFO L85 PathProgramCache]: Analyzing trace with hash -165010398, now seen corresponding path program 2 times [2024-06-14 12:04:29,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:29,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704718404] [2024-06-14 12:04:29,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:29,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:29,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:30,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:30,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704718404] [2024-06-14 12:04:30,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704718404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:30,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:30,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:04:30,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209145869] [2024-06-14 12:04:30,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:30,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:04:30,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:30,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:04:30,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:04:30,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:04:30,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 218 transitions, 2146 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:30,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:30,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:04:30,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:31,271 INFO L124 PetriNetUnfolderBase]: 2765/4177 cut-off events. [2024-06-14 12:04:31,271 INFO L125 PetriNetUnfolderBase]: For 285025/285027 co-relation queries the response was YES. [2024-06-14 12:04:31,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32655 conditions, 4177 events. 2765/4177 cut-off events. For 285025/285027 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 20902 event pairs, 773 based on Foata normal form. 3/4178 useless extension candidates. Maximal degree in co-relation 32567. Up to 4086 conditions per place. [2024-06-14 12:04:31,306 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 197 selfloop transitions, 42 changer transitions 0/242 dead transitions. [2024-06-14 12:04:31,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 242 transitions, 2961 flow [2024-06-14 12:04:31,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:04:31,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:04:31,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 12:04:31,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-14 12:04:31,308 INFO L175 Difference]: Start difference. First operand has 182 places, 218 transitions, 2146 flow. Second operand 7 states and 121 transitions. [2024-06-14 12:04:31,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 242 transitions, 2961 flow [2024-06-14 12:04:31,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 242 transitions, 2858 flow, removed 44 selfloop flow, removed 2 redundant places. [2024-06-14 12:04:31,749 INFO L231 Difference]: Finished difference. Result has 187 places, 225 transitions, 2234 flow [2024-06-14 12:04:31,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2234, PETRI_PLACES=187, PETRI_TRANSITIONS=225} [2024-06-14 12:04:31,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-14 12:04:31,750 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 225 transitions, 2234 flow [2024-06-14 12:04:31,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:31,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:31,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:31,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 12:04:31,751 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)] === [2024-06-14 12:04:31,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:31,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1939835188, now seen corresponding path program 1 times [2024-06-14 12:04:31,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:31,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802177225] [2024-06-14 12:04:31,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:31,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:33,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:33,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:33,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802177225] [2024-06-14 12:04:33,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802177225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:33,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:33,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:04:33,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551526732] [2024-06-14 12:04:33,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:33,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:04:33,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:33,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:04:33,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:04:33,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:04:33,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 225 transitions, 2234 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:33,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:33,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:04:33,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:34,229 INFO L124 PetriNetUnfolderBase]: 2735/4177 cut-off events. [2024-06-14 12:04:34,229 INFO L125 PetriNetUnfolderBase]: For 311404/311406 co-relation queries the response was YES. [2024-06-14 12:04:34,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33133 conditions, 4177 events. 2735/4177 cut-off events. For 311404/311406 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 21362 event pairs, 678 based on Foata normal form. 12/4177 useless extension candidates. Maximal degree in co-relation 33043. Up to 3624 conditions per place. [2024-06-14 12:04:34,285 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 186 selfloop transitions, 58 changer transitions 0/266 dead transitions. [2024-06-14 12:04:34,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 266 transitions, 2894 flow [2024-06-14 12:04:34,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:04:34,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:04:34,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-14 12:04:34,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2024-06-14 12:04:34,287 INFO L175 Difference]: Start difference. First operand has 187 places, 225 transitions, 2234 flow. Second operand 10 states and 187 transitions. [2024-06-14 12:04:34,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 266 transitions, 2894 flow [2024-06-14 12:04:34,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 266 transitions, 2824 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-14 12:04:34,725 INFO L231 Difference]: Finished difference. Result has 194 places, 226 transitions, 2344 flow [2024-06-14 12:04:34,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2164, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2344, PETRI_PLACES=194, PETRI_TRANSITIONS=226} [2024-06-14 12:04:34,726 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-14 12:04:34,726 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 226 transitions, 2344 flow [2024-06-14 12:04:34,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:34,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:34,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:34,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 12:04:34,726 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:34,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:34,727 INFO L85 PathProgramCache]: Analyzing trace with hash -165014366, now seen corresponding path program 2 times [2024-06-14 12:04:34,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:34,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751404743] [2024-06-14 12:04:34,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:34,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:35,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:35,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:35,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751404743] [2024-06-14 12:04:35,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751404743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:35,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:35,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:04:35,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023199006] [2024-06-14 12:04:35,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:35,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:04:35,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:35,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:04:35,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:04:35,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:04:35,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 226 transitions, 2344 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:35,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:35,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:04:35,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:36,469 INFO L124 PetriNetUnfolderBase]: 2811/4254 cut-off events. [2024-06-14 12:04:36,469 INFO L125 PetriNetUnfolderBase]: For 310181/310181 co-relation queries the response was YES. [2024-06-14 12:04:36,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33783 conditions, 4254 events. 2811/4254 cut-off events. For 310181/310181 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 21473 event pairs, 777 based on Foata normal form. 1/4253 useless extension candidates. Maximal degree in co-relation 33692. Up to 4190 conditions per place. [2024-06-14 12:04:36,528 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 212 selfloop transitions, 30 changer transitions 0/245 dead transitions. [2024-06-14 12:04:36,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 245 transitions, 2908 flow [2024-06-14 12:04:36,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:04:36,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:04:36,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:04:36,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-14 12:04:36,530 INFO L175 Difference]: Start difference. First operand has 194 places, 226 transitions, 2344 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:04:36,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 245 transitions, 2908 flow [2024-06-14 12:04:36,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 245 transitions, 2750 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-14 12:04:36,968 INFO L231 Difference]: Finished difference. Result has 194 places, 229 transitions, 2296 flow [2024-06-14 12:04:36,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2186, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2296, PETRI_PLACES=194, PETRI_TRANSITIONS=229} [2024-06-14 12:04:36,969 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-14 12:04:36,969 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 229 transitions, 2296 flow [2024-06-14 12:04:36,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:36,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:36,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:36,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 12:04:36,970 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:36,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:36,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1025385506, now seen corresponding path program 3 times [2024-06-14 12:04:36,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:36,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849289308] [2024-06-14 12:04:36,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:36,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:36,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:37,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:37,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:37,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849289308] [2024-06-14 12:04:37,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849289308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:37,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:37,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:04:37,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533066148] [2024-06-14 12:04:37,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:37,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:04:37,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:37,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:04:37,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:04:37,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:04:37,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 229 transitions, 2296 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:37,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:37,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:04:37,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:38,648 INFO L124 PetriNetUnfolderBase]: 2808/4250 cut-off events. [2024-06-14 12:04:38,649 INFO L125 PetriNetUnfolderBase]: For 314200/314200 co-relation queries the response was YES. [2024-06-14 12:04:38,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33472 conditions, 4250 events. 2808/4250 cut-off events. For 314200/314200 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 21476 event pairs, 776 based on Foata normal form. 1/4249 useless extension candidates. Maximal degree in co-relation 33380. Up to 4201 conditions per place. [2024-06-14 12:04:38,686 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 217 selfloop transitions, 25 changer transitions 0/245 dead transitions. [2024-06-14 12:04:38,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 245 transitions, 2922 flow [2024-06-14 12:04:38,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:04:38,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:04:38,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 12:04:38,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-14 12:04:38,688 INFO L175 Difference]: Start difference. First operand has 194 places, 229 transitions, 2296 flow. Second operand 7 states and 118 transitions. [2024-06-14 12:04:38,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 245 transitions, 2922 flow [2024-06-14 12:04:39,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 245 transitions, 2828 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 12:04:39,121 INFO L231 Difference]: Finished difference. Result has 196 places, 229 transitions, 2258 flow [2024-06-14 12:04:39,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2202, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2258, PETRI_PLACES=196, PETRI_TRANSITIONS=229} [2024-06-14 12:04:39,122 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-14 12:04:39,122 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 229 transitions, 2258 flow [2024-06-14 12:04:39,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:39,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:39,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:39,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 12:04:39,123 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:39,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:39,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1036813346, now seen corresponding path program 4 times [2024-06-14 12:04:39,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:39,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79697294] [2024-06-14 12:04:39,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:39,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:39,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:39,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:39,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79697294] [2024-06-14 12:04:39,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79697294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:39,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:39,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:04:39,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46703256] [2024-06-14 12:04:39,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:39,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:04:39,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:39,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:04:39,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:04:39,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:04:39,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 229 transitions, 2258 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:39,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:39,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:04:39,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:40,791 INFO L124 PetriNetUnfolderBase]: 2813/4257 cut-off events. [2024-06-14 12:04:40,791 INFO L125 PetriNetUnfolderBase]: For 325832/325832 co-relation queries the response was YES. [2024-06-14 12:04:40,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33697 conditions, 4257 events. 2813/4257 cut-off events. For 325832/325832 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 21473 event pairs, 787 based on Foata normal form. 1/4256 useless extension candidates. Maximal degree in co-relation 33604. Up to 4223 conditions per place. [2024-06-14 12:04:40,841 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 221 selfloop transitions, 20 changer transitions 0/244 dead transitions. [2024-06-14 12:04:40,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 244 transitions, 2815 flow [2024-06-14 12:04:40,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:04:40,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:04:40,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-14 12:04:40,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-14 12:04:40,842 INFO L175 Difference]: Start difference. First operand has 196 places, 229 transitions, 2258 flow. Second operand 7 states and 113 transitions. [2024-06-14 12:04:40,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 244 transitions, 2815 flow [2024-06-14 12:04:41,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 244 transitions, 2721 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 12:04:41,388 INFO L231 Difference]: Finished difference. Result has 197 places, 232 transitions, 2261 flow [2024-06-14 12:04:41,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2176, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2261, PETRI_PLACES=197, PETRI_TRANSITIONS=232} [2024-06-14 12:04:41,389 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-14 12:04:41,389 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 232 transitions, 2261 flow [2024-06-14 12:04:41,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:41,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:41,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:41,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 12:04:41,390 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:41,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:41,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1380141564, now seen corresponding path program 5 times [2024-06-14 12:04:41,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:41,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33367952] [2024-06-14 12:04:41,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:41,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:42,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:42,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:42,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33367952] [2024-06-14 12:04:42,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33367952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:42,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:42,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:04:42,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267959479] [2024-06-14 12:04:42,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:42,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:04:42,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:42,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:04:42,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:04:42,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:04:42,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 232 transitions, 2261 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:42,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:42,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:04:42,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:42,815 INFO L124 PetriNetUnfolderBase]: 2810/4254 cut-off events. [2024-06-14 12:04:42,815 INFO L125 PetriNetUnfolderBase]: For 335508/335510 co-relation queries the response was YES. [2024-06-14 12:04:42,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33772 conditions, 4254 events. 2810/4254 cut-off events. For 335508/335510 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 21520 event pairs, 790 based on Foata normal form. 3/4255 useless extension candidates. Maximal degree in co-relation 33679. Up to 4209 conditions per place. [2024-06-14 12:04:42,855 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 211 selfloop transitions, 28 changer transitions 0/242 dead transitions. [2024-06-14 12:04:42,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 242 transitions, 2869 flow [2024-06-14 12:04:42,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:04:42,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:04:42,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-14 12:04:42,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:04:42,857 INFO L175 Difference]: Start difference. First operand has 197 places, 232 transitions, 2261 flow. Second operand 7 states and 112 transitions. [2024-06-14 12:04:42,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 242 transitions, 2869 flow [2024-06-14 12:04:43,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 242 transitions, 2801 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 12:04:43,451 INFO L231 Difference]: Finished difference. Result has 199 places, 232 transitions, 2255 flow [2024-06-14 12:04:43,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2193, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2255, PETRI_PLACES=199, PETRI_TRANSITIONS=232} [2024-06-14 12:04:43,452 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-14 12:04:43,452 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 232 transitions, 2255 flow [2024-06-14 12:04:43,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:43,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:43,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:43,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 12:04:43,453 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:43,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:43,453 INFO L85 PathProgramCache]: Analyzing trace with hash 2067016936, now seen corresponding path program 6 times [2024-06-14 12:04:43,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:43,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419541764] [2024-06-14 12:04:43,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:43,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:43,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:44,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:44,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419541764] [2024-06-14 12:04:44,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419541764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:44,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:44,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:04:44,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302062602] [2024-06-14 12:04:44,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:44,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:04:44,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:44,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:04:44,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:04:44,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:04:44,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 232 transitions, 2255 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:44,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:44,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:04:44,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:44,941 INFO L124 PetriNetUnfolderBase]: 2807/4250 cut-off events. [2024-06-14 12:04:44,942 INFO L125 PetriNetUnfolderBase]: For 344184/344186 co-relation queries the response was YES. [2024-06-14 12:04:44,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33895 conditions, 4250 events. 2807/4250 cut-off events. For 344184/344186 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 21505 event pairs, 779 based on Foata normal form. 3/4251 useless extension candidates. Maximal degree in co-relation 33801. Up to 4215 conditions per place. [2024-06-14 12:04:44,989 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 218 selfloop transitions, 20 changer transitions 0/241 dead transitions. [2024-06-14 12:04:44,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 241 transitions, 2753 flow [2024-06-14 12:04:44,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:04:44,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:04:44,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-14 12:04:44,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-14 12:04:44,990 INFO L175 Difference]: Start difference. First operand has 199 places, 232 transitions, 2255 flow. Second operand 7 states and 110 transitions. [2024-06-14 12:04:44,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 241 transitions, 2753 flow [2024-06-14 12:04:45,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 241 transitions, 2648 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 12:04:45,490 INFO L231 Difference]: Finished difference. Result has 200 places, 232 transitions, 2196 flow [2024-06-14 12:04:45,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2150, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2196, PETRI_PLACES=200, PETRI_TRANSITIONS=232} [2024-06-14 12:04:45,490 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-14 12:04:45,490 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 232 transitions, 2196 flow [2024-06-14 12:04:45,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:45,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:45,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:45,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 12:04:45,491 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)] === [2024-06-14 12:04:45,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:45,491 INFO L85 PathProgramCache]: Analyzing trace with hash -704976808, now seen corresponding path program 1 times [2024-06-14 12:04:45,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:45,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828180332] [2024-06-14 12:04:45,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:45,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:45,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:46,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:46,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:46,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828180332] [2024-06-14 12:04:46,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828180332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:46,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:46,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:04:46,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172912255] [2024-06-14 12:04:46,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:46,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:04:46,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:46,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:04:46,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:04:46,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:04:46,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 232 transitions, 2196 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:46,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:46,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:04:46,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:47,825 INFO L124 PetriNetUnfolderBase]: 2837/4355 cut-off events. [2024-06-14 12:04:47,825 INFO L125 PetriNetUnfolderBase]: For 374080/374080 co-relation queries the response was YES. [2024-06-14 12:04:47,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34688 conditions, 4355 events. 2837/4355 cut-off events. For 374080/374080 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 22746 event pairs, 769 based on Foata normal form. 16/4369 useless extension candidates. Maximal degree in co-relation 34593. Up to 3885 conditions per place. [2024-06-14 12:04:47,872 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 214 selfloop transitions, 34 changer transitions 0/272 dead transitions. [2024-06-14 12:04:47,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 272 transitions, 2912 flow [2024-06-14 12:04:47,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:04:47,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:04:47,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-14 12:04:47,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261904761904762 [2024-06-14 12:04:47,873 INFO L175 Difference]: Start difference. First operand has 200 places, 232 transitions, 2196 flow. Second operand 10 states and 179 transitions. [2024-06-14 12:04:47,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 272 transitions, 2912 flow [2024-06-14 12:04:48,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 272 transitions, 2870 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 12:04:48,591 INFO L231 Difference]: Finished difference. Result has 205 places, 234 transitions, 2320 flow [2024-06-14 12:04:48,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2154, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2320, PETRI_PLACES=205, PETRI_TRANSITIONS=234} [2024-06-14 12:04:48,592 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-14 12:04:48,592 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 234 transitions, 2320 flow [2024-06-14 12:04:48,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:48,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:48,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:48,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 12:04:48,593 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:04:48,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:48,594 INFO L85 PathProgramCache]: Analyzing trace with hash -95884930, now seen corresponding path program 2 times [2024-06-14 12:04:48,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:48,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854553718] [2024-06-14 12:04:48,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:48,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:48,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:50,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:50,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:50,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854553718] [2024-06-14 12:04:50,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854553718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:50,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:50,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:04:50,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96936491] [2024-06-14 12:04:50,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:50,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:04:50,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:50,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:04:50,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:04:50,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:04:50,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 234 transitions, 2320 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:50,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:50,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:04:50,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:51,427 INFO L124 PetriNetUnfolderBase]: 2919/4497 cut-off events. [2024-06-14 12:04:51,427 INFO L125 PetriNetUnfolderBase]: For 389687/389687 co-relation queries the response was YES. [2024-06-14 12:04:51,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36037 conditions, 4497 events. 2919/4497 cut-off events. For 389687/389687 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 23849 event pairs, 774 based on Foata normal form. 12/4507 useless extension candidates. Maximal degree in co-relation 35941. Up to 4097 conditions per place. [2024-06-14 12:04:51,476 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 217 selfloop transitions, 31 changer transitions 0/272 dead transitions. [2024-06-14 12:04:51,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 272 transitions, 3008 flow [2024-06-14 12:04:51,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:04:51,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:04:51,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-14 12:04:51,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-14 12:04:51,477 INFO L175 Difference]: Start difference. First operand has 205 places, 234 transitions, 2320 flow. Second operand 10 states and 176 transitions. [2024-06-14 12:04:51,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 272 transitions, 3008 flow [2024-06-14 12:04:52,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 272 transitions, 2910 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-14 12:04:52,206 INFO L231 Difference]: Finished difference. Result has 207 places, 236 transitions, 2383 flow [2024-06-14 12:04:52,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2222, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2383, PETRI_PLACES=207, PETRI_TRANSITIONS=236} [2024-06-14 12:04:52,207 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-14 12:04:52,207 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 236 transitions, 2383 flow [2024-06-14 12:04:52,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:52,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:52,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:52,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 12:04:52,208 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)] === [2024-06-14 12:04:52,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:52,208 INFO L85 PathProgramCache]: Analyzing trace with hash 573091438, now seen corresponding path program 3 times [2024-06-14 12:04:52,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:52,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534124958] [2024-06-14 12:04:52,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:52,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:53,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:53,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:53,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534124958] [2024-06-14 12:04:53,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534124958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:53,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:53,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:04:53,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199424200] [2024-06-14 12:04:53,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:53,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:04:53,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:53,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:04:53,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:04:53,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:04:53,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 236 transitions, 2383 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:53,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:53,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:04:53,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:54,789 INFO L124 PetriNetUnfolderBase]: 2960/4568 cut-off events. [2024-06-14 12:04:54,790 INFO L125 PetriNetUnfolderBase]: For 403190/403190 co-relation queries the response was YES. [2024-06-14 12:04:54,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36605 conditions, 4568 events. 2960/4568 cut-off events. For 403190/403190 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 24367 event pairs, 799 based on Foata normal form. 12/4578 useless extension candidates. Maximal degree in co-relation 36508. Up to 4150 conditions per place. [2024-06-14 12:04:54,834 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 210 selfloop transitions, 40 changer transitions 0/274 dead transitions. [2024-06-14 12:04:54,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 274 transitions, 3051 flow [2024-06-14 12:04:54,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:04:54,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:04:54,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-14 12:04:54,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-14 12:04:54,836 INFO L175 Difference]: Start difference. First operand has 207 places, 236 transitions, 2383 flow. Second operand 10 states and 181 transitions. [2024-06-14 12:04:54,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 274 transitions, 3051 flow [2024-06-14 12:04:55,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 274 transitions, 2930 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-14 12:04:55,502 INFO L231 Difference]: Finished difference. Result has 209 places, 237 transitions, 2412 flow [2024-06-14 12:04:55,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2262, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2412, PETRI_PLACES=209, PETRI_TRANSITIONS=237} [2024-06-14 12:04:55,503 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-14 12:04:55,503 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 237 transitions, 2412 flow [2024-06-14 12:04:55,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:55,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:55,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:55,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 12:04:55,504 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)] === [2024-06-14 12:04:55,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:55,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1887093894, now seen corresponding path program 4 times [2024-06-14 12:04:55,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:55,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445287502] [2024-06-14 12:04:55,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:55,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:55,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:56,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:56,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:56,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445287502] [2024-06-14 12:04:56,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445287502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:56,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:56,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:04:56,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447978623] [2024-06-14 12:04:56,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:56,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:04:56,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:56,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:04:56,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:04:57,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:04:57,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 237 transitions, 2412 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:57,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:57,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:04:57,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:57,996 INFO L124 PetriNetUnfolderBase]: 3035/4693 cut-off events. [2024-06-14 12:04:57,996 INFO L125 PetriNetUnfolderBase]: For 416535/416535 co-relation queries the response was YES. [2024-06-14 12:04:58,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37298 conditions, 4693 events. 3035/4693 cut-off events. For 416535/416535 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 25316 event pairs, 819 based on Foata normal form. 12/4703 useless extension candidates. Maximal degree in co-relation 37200. Up to 4366 conditions per place. [2024-06-14 12:04:58,044 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 231 selfloop transitions, 24 changer transitions 0/279 dead transitions. [2024-06-14 12:04:58,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 279 transitions, 3119 flow [2024-06-14 12:04:58,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:04:58,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:04:58,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-14 12:04:58,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-14 12:04:58,045 INFO L175 Difference]: Start difference. First operand has 209 places, 237 transitions, 2412 flow. Second operand 10 states and 176 transitions. [2024-06-14 12:04:58,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 279 transitions, 3119 flow [2024-06-14 12:04:58,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 279 transitions, 2991 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-14 12:04:58,525 INFO L231 Difference]: Finished difference. Result has 213 places, 243 transitions, 2454 flow [2024-06-14 12:04:58,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2284, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2454, PETRI_PLACES=213, PETRI_TRANSITIONS=243} [2024-06-14 12:04:58,525 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-14 12:04:58,526 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 243 transitions, 2454 flow [2024-06-14 12:04:58,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:58,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:58,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:58,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 12:04:58,526 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)] === [2024-06-14 12:04:58,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:58,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1645580766, now seen corresponding path program 5 times [2024-06-14 12:04:58,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:58,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127083639] [2024-06-14 12:04:58,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:58,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:58,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:00,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:00,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:00,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127083639] [2024-06-14 12:05:00,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127083639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:00,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:00,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:05:00,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520988670] [2024-06-14 12:05:00,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:00,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:05:00,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:00,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:05:00,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:05:00,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:05:00,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 243 transitions, 2454 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:00,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:00,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:05:00,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:01,294 INFO L124 PetriNetUnfolderBase]: 3076/4764 cut-off events. [2024-06-14 12:05:01,294 INFO L125 PetriNetUnfolderBase]: For 430434/430434 co-relation queries the response was YES. [2024-06-14 12:05:01,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37864 conditions, 4764 events. 3076/4764 cut-off events. For 430434/430434 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 25792 event pairs, 823 based on Foata normal form. 12/4774 useless extension candidates. Maximal degree in co-relation 37763. Up to 4464 conditions per place. [2024-06-14 12:05:01,344 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 235 selfloop transitions, 21 changer transitions 0/280 dead transitions. [2024-06-14 12:05:01,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 280 transitions, 3132 flow [2024-06-14 12:05:01,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:05:01,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:05:01,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-14 12:05:01,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-14 12:05:01,351 INFO L175 Difference]: Start difference. First operand has 213 places, 243 transitions, 2454 flow. Second operand 10 states and 174 transitions. [2024-06-14 12:05:01,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 280 transitions, 3132 flow [2024-06-14 12:05:01,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 280 transitions, 3047 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 12:05:01,845 INFO L231 Difference]: Finished difference. Result has 218 places, 244 transitions, 2485 flow [2024-06-14 12:05:01,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2369, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2485, PETRI_PLACES=218, PETRI_TRANSITIONS=244} [2024-06-14 12:05:01,846 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-14 12:05:01,846 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 244 transitions, 2485 flow [2024-06-14 12:05:01,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:01,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:01,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:01,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 12:05:01,847 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)] === [2024-06-14 12:05:01,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:01,847 INFO L85 PathProgramCache]: Analyzing trace with hash -764798668, now seen corresponding path program 6 times [2024-06-14 12:05:01,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:01,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503250527] [2024-06-14 12:05:01,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:01,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:01,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:03,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:03,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:03,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503250527] [2024-06-14 12:05:03,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503250527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:03,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:03,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:05:03,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132245233] [2024-06-14 12:05:03,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:03,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:05:03,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:03,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:05:03,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:05:03,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:05:03,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 244 transitions, 2485 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:03,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:03,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:05:03,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:04,690 INFO L124 PetriNetUnfolderBase]: 3056/4732 cut-off events. [2024-06-14 12:05:04,690 INFO L125 PetriNetUnfolderBase]: For 424658/424658 co-relation queries the response was YES. [2024-06-14 12:05:04,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36942 conditions, 4732 events. 3056/4732 cut-off events. For 424658/424658 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25629 event pairs, 795 based on Foata normal form. 12/4742 useless extension candidates. Maximal degree in co-relation 36840. Up to 4250 conditions per place. [2024-06-14 12:05:04,747 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 217 selfloop transitions, 38 changer transitions 0/279 dead transitions. [2024-06-14 12:05:04,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 279 transitions, 3021 flow [2024-06-14 12:05:04,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:05:04,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:05:04,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-14 12:05:04,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-14 12:05:04,748 INFO L175 Difference]: Start difference. First operand has 218 places, 244 transitions, 2485 flow. Second operand 10 states and 176 transitions. [2024-06-14 12:05:04,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 279 transitions, 3021 flow [2024-06-14 12:05:05,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 279 transitions, 2927 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-14 12:05:05,246 INFO L231 Difference]: Finished difference. Result has 219 places, 243 transitions, 2397 flow [2024-06-14 12:05:05,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2315, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2397, PETRI_PLACES=219, PETRI_TRANSITIONS=243} [2024-06-14 12:05:05,247 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-14 12:05:05,248 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 243 transitions, 2397 flow [2024-06-14 12:05:05,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:05,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:05,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:05,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 12:05:05,248 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:05,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:05,249 INFO L85 PathProgramCache]: Analyzing trace with hash 2061299048, now seen corresponding path program 3 times [2024-06-14 12:05:05,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:05,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334091540] [2024-06-14 12:05:05,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:05,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:05,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:06,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:06,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:06,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334091540] [2024-06-14 12:05:06,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334091540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:06,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:06,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:05:06,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229144107] [2024-06-14 12:05:06,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:06,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:05:06,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:06,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:05:06,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:05:06,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:05:06,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 243 transitions, 2397 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:06,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:06,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:05:06,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:07,142 INFO L124 PetriNetUnfolderBase]: 3131/4806 cut-off events. [2024-06-14 12:05:07,142 INFO L125 PetriNetUnfolderBase]: For 414530/414530 co-relation queries the response was YES. [2024-06-14 12:05:07,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37170 conditions, 4806 events. 3131/4806 cut-off events. For 414530/414530 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25692 event pairs, 884 based on Foata normal form. 1/4805 useless extension candidates. Maximal degree in co-relation 37067. Up to 4781 conditions per place. [2024-06-14 12:05:07,198 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 232 selfloop transitions, 18 changer transitions 0/253 dead transitions. [2024-06-14 12:05:07,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 253 transitions, 2921 flow [2024-06-14 12:05:07,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:05:07,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:05:07,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-14 12:05:07,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-14 12:05:07,199 INFO L175 Difference]: Start difference. First operand has 219 places, 243 transitions, 2397 flow. Second operand 8 states and 119 transitions. [2024-06-14 12:05:07,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 253 transitions, 2921 flow [2024-06-14 12:05:07,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 253 transitions, 2773 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-14 12:05:07,869 INFO L231 Difference]: Finished difference. Result has 219 places, 243 transitions, 2291 flow [2024-06-14 12:05:07,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2249, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2291, PETRI_PLACES=219, PETRI_TRANSITIONS=243} [2024-06-14 12:05:07,870 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-14 12:05:07,870 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 243 transitions, 2291 flow [2024-06-14 12:05:07,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:07,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:07,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:07,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 12:05:07,871 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:07,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:07,871 INFO L85 PathProgramCache]: Analyzing trace with hash 2074643432, now seen corresponding path program 1 times [2024-06-14 12:05:07,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:07,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340396289] [2024-06-14 12:05:07,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:07,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:07,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:08,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:08,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:08,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340396289] [2024-06-14 12:05:08,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340396289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:08,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:08,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:05:08,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243115545] [2024-06-14 12:05:08,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:08,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:05:08,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:08,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:05:08,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:05:08,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:05:08,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 243 transitions, 2291 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:08,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:08,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:05:08,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:09,810 INFO L124 PetriNetUnfolderBase]: 2896/4524 cut-off events. [2024-06-14 12:05:09,811 INFO L125 PetriNetUnfolderBase]: For 406439/406450 co-relation queries the response was YES. [2024-06-14 12:05:09,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34941 conditions, 4524 events. 2896/4524 cut-off events. For 406439/406450 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 24841 event pairs, 826 based on Foata normal form. 5/4485 useless extension candidates. Maximal degree in co-relation 34837. Up to 4358 conditions per place. [2024-06-14 12:05:09,857 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 216 selfloop transitions, 18 changer transitions 0/258 dead transitions. [2024-06-14 12:05:09,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 258 transitions, 2837 flow [2024-06-14 12:05:09,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:05:09,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:05:09,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:05:09,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:05:09,859 INFO L175 Difference]: Start difference. First operand has 219 places, 243 transitions, 2291 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:05:09,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 258 transitions, 2837 flow [2024-06-14 12:05:10,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 258 transitions, 2759 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 12:05:10,331 INFO L231 Difference]: Finished difference. Result has 219 places, 246 transitions, 2311 flow [2024-06-14 12:05:10,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2213, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2311, PETRI_PLACES=219, PETRI_TRANSITIONS=246} [2024-06-14 12:05:10,332 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-14 12:05:10,332 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 246 transitions, 2311 flow [2024-06-14 12:05:10,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:10,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:10,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:10,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 12:05:10,333 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:10,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:10,333 INFO L85 PathProgramCache]: Analyzing trace with hash 2033485321, now seen corresponding path program 1 times [2024-06-14 12:05:10,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:10,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004865514] [2024-06-14 12:05:10,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:10,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:11,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:11,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:11,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004865514] [2024-06-14 12:05:11,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004865514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:11,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:11,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:05:11,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301868471] [2024-06-14 12:05:11,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:11,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:05:11,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:11,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:05:11,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:05:11,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:05:11,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 246 transitions, 2311 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:11,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:11,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:05:11,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:12,134 INFO L124 PetriNetUnfolderBase]: 3149/4832 cut-off events. [2024-06-14 12:05:12,134 INFO L125 PetriNetUnfolderBase]: For 422830/422830 co-relation queries the response was YES. [2024-06-14 12:05:12,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37079 conditions, 4832 events. 3149/4832 cut-off events. For 422830/422830 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 25842 event pairs, 885 based on Foata normal form. 6/4836 useless extension candidates. Maximal degree in co-relation 36974. Up to 4760 conditions per place. [2024-06-14 12:05:12,182 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 246 selfloop transitions, 20 changer transitions 0/269 dead transitions. [2024-06-14 12:05:12,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 269 transitions, 2953 flow [2024-06-14 12:05:12,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:05:12,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:05:12,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:05:12,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-14 12:05:12,186 INFO L175 Difference]: Start difference. First operand has 219 places, 246 transitions, 2311 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:05:12,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 269 transitions, 2953 flow [2024-06-14 12:05:12,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 269 transitions, 2871 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 12:05:12,732 INFO L231 Difference]: Finished difference. Result has 221 places, 249 transitions, 2337 flow [2024-06-14 12:05:12,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2229, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2337, PETRI_PLACES=221, PETRI_TRANSITIONS=249} [2024-06-14 12:05:12,733 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-14 12:05:12,733 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 249 transitions, 2337 flow [2024-06-14 12:05:12,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:12,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:12,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:12,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 12:05:12,733 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:12,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:12,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1124830519, now seen corresponding path program 2 times [2024-06-14 12:05:12,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:12,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191382599] [2024-06-14 12:05:12,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:12,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:12,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:13,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:13,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:13,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191382599] [2024-06-14 12:05:13,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191382599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:13,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:13,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:05:13,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334099252] [2024-06-14 12:05:13,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:13,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:05:13,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:13,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:05:13,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:05:13,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:05:13,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 249 transitions, 2337 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:13,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:13,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:05:13,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:14,626 INFO L124 PetriNetUnfolderBase]: 3227/4940 cut-off events. [2024-06-14 12:05:14,626 INFO L125 PetriNetUnfolderBase]: For 449326/449326 co-relation queries the response was YES. [2024-06-14 12:05:14,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38698 conditions, 4940 events. 3227/4940 cut-off events. For 449326/449326 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 26403 event pairs, 875 based on Foata normal form. 6/4944 useless extension candidates. Maximal degree in co-relation 38592. Up to 4695 conditions per place. [2024-06-14 12:05:14,786 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 232 selfloop transitions, 49 changer transitions 0/284 dead transitions. [2024-06-14 12:05:14,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 284 transitions, 3409 flow [2024-06-14 12:05:14,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:05:14,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:05:14,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:05:14,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-14 12:05:14,788 INFO L175 Difference]: Start difference. First operand has 221 places, 249 transitions, 2337 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:05:14,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 284 transitions, 3409 flow [2024-06-14 12:05:15,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 284 transitions, 3323 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 12:05:15,548 INFO L231 Difference]: Finished difference. Result has 223 places, 258 transitions, 2547 flow [2024-06-14 12:05:15,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2251, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2547, PETRI_PLACES=223, PETRI_TRANSITIONS=258} [2024-06-14 12:05:15,549 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-14 12:05:15,549 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 258 transitions, 2547 flow [2024-06-14 12:05:15,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:15,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:15,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:15,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 12:05:15,550 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)] === [2024-06-14 12:05:15,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:15,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1036821437, now seen corresponding path program 3 times [2024-06-14 12:05:15,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:15,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159658104] [2024-06-14 12:05:15,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:15,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:16,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:16,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:16,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159658104] [2024-06-14 12:05:16,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159658104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:16,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:16,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:05:16,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395204243] [2024-06-14 12:05:16,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:16,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:05:16,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:16,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:05:16,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:05:16,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:05:16,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 258 transitions, 2547 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:16,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:16,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:05:16,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:17,528 INFO L124 PetriNetUnfolderBase]: 3209/4916 cut-off events. [2024-06-14 12:05:17,528 INFO L125 PetriNetUnfolderBase]: For 452427/452427 co-relation queries the response was YES. [2024-06-14 12:05:17,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38631 conditions, 4916 events. 3209/4916 cut-off events. For 452427/452427 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 26257 event pairs, 871 based on Foata normal form. 6/4920 useless extension candidates. Maximal degree in co-relation 38524. Up to 4684 conditions per place. [2024-06-14 12:05:17,587 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 234 selfloop transitions, 48 changer transitions 0/285 dead transitions. [2024-06-14 12:05:17,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 285 transitions, 3315 flow [2024-06-14 12:05:17,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:05:17,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:05:17,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 12:05:17,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-14 12:05:17,588 INFO L175 Difference]: Start difference. First operand has 223 places, 258 transitions, 2547 flow. Second operand 8 states and 145 transitions. [2024-06-14 12:05:17,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 285 transitions, 3315 flow [2024-06-14 12:05:18,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 285 transitions, 3185 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-14 12:05:18,352 INFO L231 Difference]: Finished difference. Result has 228 places, 258 transitions, 2519 flow [2024-06-14 12:05:18,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2417, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2519, PETRI_PLACES=228, PETRI_TRANSITIONS=258} [2024-06-14 12:05:18,352 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-14 12:05:18,352 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 258 transitions, 2519 flow [2024-06-14 12:05:18,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:18,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:18,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:18,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 12:05:18,353 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)] === [2024-06-14 12:05:18,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:18,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1367062323, now seen corresponding path program 4 times [2024-06-14 12:05:18,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:18,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224343258] [2024-06-14 12:05:18,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:18,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:19,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:19,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:19,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224343258] [2024-06-14 12:05:19,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224343258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:19,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:19,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:05:19,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65369845] [2024-06-14 12:05:19,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:19,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:05:19,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:19,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:05:19,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:05:19,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:05:19,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 258 transitions, 2519 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:19,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:19,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:05:19,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:20,245 INFO L124 PetriNetUnfolderBase]: 3239/4959 cut-off events. [2024-06-14 12:05:20,246 INFO L125 PetriNetUnfolderBase]: For 464916/464918 co-relation queries the response was YES. [2024-06-14 12:05:20,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38993 conditions, 4959 events. 3239/4959 cut-off events. For 464916/464918 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 26489 event pairs, 888 based on Foata normal form. 6/4963 useless extension candidates. Maximal degree in co-relation 38884. Up to 4706 conditions per place. [2024-06-14 12:05:20,301 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 224 selfloop transitions, 54 changer transitions 0/281 dead transitions. [2024-06-14 12:05:20,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 281 transitions, 3331 flow [2024-06-14 12:05:20,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:05:20,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:05:20,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:05:20,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 12:05:20,305 INFO L175 Difference]: Start difference. First operand has 228 places, 258 transitions, 2519 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:05:20,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 281 transitions, 3331 flow [2024-06-14 12:05:20,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 281 transitions, 3211 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 12:05:20,988 INFO L231 Difference]: Finished difference. Result has 229 places, 261 transitions, 2583 flow [2024-06-14 12:05:20,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2405, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2583, PETRI_PLACES=229, PETRI_TRANSITIONS=261} [2024-06-14 12:05:20,988 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-14 12:05:20,989 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 261 transitions, 2583 flow [2024-06-14 12:05:20,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:20,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:20,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:20,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 12:05:20,989 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)] === [2024-06-14 12:05:20,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:20,990 INFO L85 PathProgramCache]: Analyzing trace with hash -986297383, now seen corresponding path program 5 times [2024-06-14 12:05:20,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:20,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439378337] [2024-06-14 12:05:20,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:20,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:20,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:21,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:21,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:21,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439378337] [2024-06-14 12:05:21,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439378337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:21,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:21,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:05:21,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277118627] [2024-06-14 12:05:21,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:21,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:05:21,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:21,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:05:21,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:05:21,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:05:21,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 261 transitions, 2583 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:21,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:21,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:05:21,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:22,934 INFO L124 PetriNetUnfolderBase]: 3269/5001 cut-off events. [2024-06-14 12:05:22,934 INFO L125 PetriNetUnfolderBase]: For 479138/479140 co-relation queries the response was YES. [2024-06-14 12:05:22,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39521 conditions, 5001 events. 3269/5001 cut-off events. For 479138/479140 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 26756 event pairs, 893 based on Foata normal form. 6/5005 useless extension candidates. Maximal degree in co-relation 39411. Up to 4728 conditions per place. [2024-06-14 12:05:23,002 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 228 selfloop transitions, 55 changer transitions 0/286 dead transitions. [2024-06-14 12:05:23,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 286 transitions, 3413 flow [2024-06-14 12:05:23,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:05:23,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:05:23,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:05:23,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-14 12:05:23,004 INFO L175 Difference]: Start difference. First operand has 229 places, 261 transitions, 2583 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:05:23,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 286 transitions, 3413 flow [2024-06-14 12:05:23,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 286 transitions, 3261 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-14 12:05:23,817 INFO L231 Difference]: Finished difference. Result has 232 places, 264 transitions, 2617 flow [2024-06-14 12:05:23,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2444, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2617, PETRI_PLACES=232, PETRI_TRANSITIONS=264} [2024-06-14 12:05:23,817 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-14 12:05:23,817 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 264 transitions, 2617 flow [2024-06-14 12:05:23,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:23,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:23,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:23,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 12:05:23,818 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)] === [2024-06-14 12:05:23,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:23,818 INFO L85 PathProgramCache]: Analyzing trace with hash -986291803, now seen corresponding path program 6 times [2024-06-14 12:05:23,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:23,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88279480] [2024-06-14 12:05:23,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:23,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:23,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:24,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:24,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88279480] [2024-06-14 12:05:24,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88279480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:24,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:24,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:05:24,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082111147] [2024-06-14 12:05:24,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:24,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:05:24,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:24,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:05:24,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:05:24,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:05:24,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 264 transitions, 2617 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:24,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:24,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:05:24,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:25,838 INFO L124 PetriNetUnfolderBase]: 3251/4977 cut-off events. [2024-06-14 12:05:25,838 INFO L125 PetriNetUnfolderBase]: For 477123/477125 co-relation queries the response was YES. [2024-06-14 12:05:25,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38887 conditions, 4977 events. 3251/4977 cut-off events. For 477123/477125 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 26627 event pairs, 898 based on Foata normal form. 6/4981 useless extension candidates. Maximal degree in co-relation 38776. Up to 4717 conditions per place. [2024-06-14 12:05:25,897 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 229 selfloop transitions, 54 changer transitions 0/286 dead transitions. [2024-06-14 12:05:25,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 286 transitions, 3247 flow [2024-06-14 12:05:25,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:05:25,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:05:25,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:05:25,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 12:05:25,898 INFO L175 Difference]: Start difference. First operand has 232 places, 264 transitions, 2617 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:05:25,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 286 transitions, 3247 flow [2024-06-14 12:05:26,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 286 transitions, 3042 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-14 12:05:26,831 INFO L231 Difference]: Finished difference. Result has 234 places, 264 transitions, 2526 flow [2024-06-14 12:05:26,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2412, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2526, PETRI_PLACES=234, PETRI_TRANSITIONS=264} [2024-06-14 12:05:26,831 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-14 12:05:26,831 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 264 transitions, 2526 flow [2024-06-14 12:05:26,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:26,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:26,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:26,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 12:05:26,832 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:26,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:26,832 INFO L85 PathProgramCache]: Analyzing trace with hash 2074659304, now seen corresponding path program 1 times [2024-06-14 12:05:26,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:26,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83680069] [2024-06-14 12:05:26,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:26,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:26,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:28,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:28,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:28,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83680069] [2024-06-14 12:05:28,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83680069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:28,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:28,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:05:28,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917186677] [2024-06-14 12:05:28,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:28,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:05:28,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:28,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:05:28,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:05:28,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:05:28,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 264 transitions, 2526 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:28,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:28,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:05:28,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:29,119 INFO L124 PetriNetUnfolderBase]: 3033/4717 cut-off events. [2024-06-14 12:05:29,119 INFO L125 PetriNetUnfolderBase]: For 475011/475022 co-relation queries the response was YES. [2024-06-14 12:05:29,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37252 conditions, 4717 events. 3033/4717 cut-off events. For 475011/475022 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 25819 event pairs, 855 based on Foata normal form. 3/4676 useless extension candidates. Maximal degree in co-relation 37140. Up to 4554 conditions per place. [2024-06-14 12:05:29,193 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 237 selfloop transitions, 17 changer transitions 0/278 dead transitions. [2024-06-14 12:05:29,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 278 transitions, 3108 flow [2024-06-14 12:05:29,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:05:29,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:05:29,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 12:05:29,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-14 12:05:29,194 INFO L175 Difference]: Start difference. First operand has 234 places, 264 transitions, 2526 flow. Second operand 8 states and 127 transitions. [2024-06-14 12:05:29,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 278 transitions, 3108 flow [2024-06-14 12:05:29,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 278 transitions, 2962 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 12:05:29,798 INFO L231 Difference]: Finished difference. Result has 234 places, 266 transitions, 2469 flow [2024-06-14 12:05:29,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2380, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2469, PETRI_PLACES=234, PETRI_TRANSITIONS=266} [2024-06-14 12:05:29,799 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-14 12:05:29,799 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 266 transitions, 2469 flow [2024-06-14 12:05:29,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:29,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:29,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:29,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 12:05:29,800 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:29,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:29,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1861580396, now seen corresponding path program 1 times [2024-06-14 12:05:29,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:29,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139445602] [2024-06-14 12:05:29,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:29,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:29,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:30,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:30,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139445602] [2024-06-14 12:05:30,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139445602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:30,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:30,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:05:30,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582574471] [2024-06-14 12:05:30,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:30,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:05:30,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:30,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:05:30,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:05:30,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:05:30,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 266 transitions, 2469 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:30,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:30,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:05:30,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:31,623 INFO L124 PetriNetUnfolderBase]: 3259/4987 cut-off events. [2024-06-14 12:05:31,623 INFO L125 PetriNetUnfolderBase]: For 487285/487285 co-relation queries the response was YES. [2024-06-14 12:05:31,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38883 conditions, 4987 events. 3259/4987 cut-off events. For 487285/487285 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 26678 event pairs, 903 based on Foata normal form. 1/4986 useless extension candidates. Maximal degree in co-relation 38770. Up to 4906 conditions per place. [2024-06-14 12:05:31,684 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 260 selfloop transitions, 36 changer transitions 0/299 dead transitions. [2024-06-14 12:05:31,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 299 transitions, 3380 flow [2024-06-14 12:05:31,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:05:31,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:05:31,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:05:31,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-14 12:05:31,685 INFO L175 Difference]: Start difference. First operand has 234 places, 266 transitions, 2469 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:05:31,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 299 transitions, 3380 flow [2024-06-14 12:05:32,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 299 transitions, 3307 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 12:05:32,286 INFO L231 Difference]: Finished difference. Result has 237 places, 273 transitions, 2603 flow [2024-06-14 12:05:32,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2396, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2603, PETRI_PLACES=237, PETRI_TRANSITIONS=273} [2024-06-14 12:05:32,288 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-14 12:05:32,288 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 273 transitions, 2603 flow [2024-06-14 12:05:32,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:32,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:32,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:32,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 12:05:32,289 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:32,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:32,289 INFO L85 PathProgramCache]: Analyzing trace with hash 2033528096, now seen corresponding path program 2 times [2024-06-14 12:05:32,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:32,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527862372] [2024-06-14 12:05:32,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:32,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:33,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:33,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:33,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527862372] [2024-06-14 12:05:33,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527862372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:33,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:33,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:05:33,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366789967] [2024-06-14 12:05:33,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:33,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:05:33,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:33,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:05:33,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:05:33,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:05:33,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 273 transitions, 2603 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:33,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:33,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:05:33,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:34,105 INFO L124 PetriNetUnfolderBase]: 3264/4994 cut-off events. [2024-06-14 12:05:34,106 INFO L125 PetriNetUnfolderBase]: For 502237/502237 co-relation queries the response was YES. [2024-06-14 12:05:34,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39486 conditions, 4994 events. 3264/4994 cut-off events. For 502237/502237 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 26735 event pairs, 907 based on Foata normal form. 1/4993 useless extension candidates. Maximal degree in co-relation 39371. Up to 4912 conditions per place. [2024-06-14 12:05:34,180 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 261 selfloop transitions, 40 changer transitions 0/304 dead transitions. [2024-06-14 12:05:34,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 304 transitions, 3480 flow [2024-06-14 12:05:34,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:05:34,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:05:34,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-14 12:05:34,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880952380952381 [2024-06-14 12:05:34,181 INFO L175 Difference]: Start difference. First operand has 237 places, 273 transitions, 2603 flow. Second operand 10 states and 163 transitions. [2024-06-14 12:05:34,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 304 transitions, 3480 flow [2024-06-14 12:05:35,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 304 transitions, 3346 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-14 12:05:35,630 INFO L231 Difference]: Finished difference. Result has 243 places, 276 transitions, 2616 flow [2024-06-14 12:05:35,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2495, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2616, PETRI_PLACES=243, PETRI_TRANSITIONS=276} [2024-06-14 12:05:35,631 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-14 12:05:35,631 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 276 transitions, 2616 flow [2024-06-14 12:05:35,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:35,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:35,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:35,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 12:05:35,632 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:35,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:35,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1747897940, now seen corresponding path program 1 times [2024-06-14 12:05:35,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:35,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706619269] [2024-06-14 12:05:35,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:35,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:35,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:36,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:36,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706619269] [2024-06-14 12:05:36,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706619269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:36,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:36,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:05:36,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896605079] [2024-06-14 12:05:36,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:36,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:05:36,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:36,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:05:36,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:05:36,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:05:36,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 276 transitions, 2616 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:36,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:36,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:05:36,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:37,885 INFO L124 PetriNetUnfolderBase]: 3272/5006 cut-off events. [2024-06-14 12:05:37,886 INFO L125 PetriNetUnfolderBase]: For 518239/518239 co-relation queries the response was YES. [2024-06-14 12:05:37,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39755 conditions, 5006 events. 3272/5006 cut-off events. For 518239/518239 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 26680 event pairs, 773 based on Foata normal form. 2/5006 useless extension candidates. Maximal degree in co-relation 39638. Up to 4868 conditions per place. [2024-06-14 12:05:37,941 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 268 selfloop transitions, 44 changer transitions 0/315 dead transitions. [2024-06-14 12:05:37,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 315 transitions, 3560 flow [2024-06-14 12:05:37,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:05:37,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:05:37,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 12:05:37,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-14 12:05:37,942 INFO L175 Difference]: Start difference. First operand has 243 places, 276 transitions, 2616 flow. Second operand 9 states and 158 transitions. [2024-06-14 12:05:37,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 315 transitions, 3560 flow [2024-06-14 12:05:38,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 315 transitions, 3460 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-14 12:05:38,762 INFO L231 Difference]: Finished difference. Result has 244 places, 280 transitions, 2697 flow [2024-06-14 12:05:38,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2516, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2697, PETRI_PLACES=244, PETRI_TRANSITIONS=280} [2024-06-14 12:05:38,763 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-14 12:05:38,763 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 280 transitions, 2697 flow [2024-06-14 12:05:38,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:38,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:38,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:38,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 12:05:38,764 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:38,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:38,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1115695938, now seen corresponding path program 1 times [2024-06-14 12:05:38,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:38,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649597108] [2024-06-14 12:05:38,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:38,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:39,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:39,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:39,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649597108] [2024-06-14 12:05:39,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649597108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:39,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:39,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:05:39,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345952536] [2024-06-14 12:05:39,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:39,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:05:39,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:39,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:05:39,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:05:39,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:05:39,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 280 transitions, 2697 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:39,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:39,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:05:39,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:41,128 INFO L124 PetriNetUnfolderBase]: 3318/5070 cut-off events. [2024-06-14 12:05:41,128 INFO L125 PetriNetUnfolderBase]: For 541313/541313 co-relation queries the response was YES. [2024-06-14 12:05:41,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40648 conditions, 5070 events. 3318/5070 cut-off events. For 541313/541313 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 27183 event pairs, 897 based on Foata normal form. 3/5071 useless extension candidates. Maximal degree in co-relation 40530. Up to 4857 conditions per place. [2024-06-14 12:05:41,182 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 272 selfloop transitions, 63 changer transitions 0/338 dead transitions. [2024-06-14 12:05:41,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 338 transitions, 3796 flow [2024-06-14 12:05:41,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:05:41,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:05:41,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-14 12:05:41,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-14 12:05:41,183 INFO L175 Difference]: Start difference. First operand has 244 places, 280 transitions, 2697 flow. Second operand 11 states and 192 transitions. [2024-06-14 12:05:41,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 338 transitions, 3796 flow [2024-06-14 12:05:42,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 338 transitions, 3691 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 12:05:42,144 INFO L231 Difference]: Finished difference. Result has 252 places, 298 transitions, 2949 flow [2024-06-14 12:05:42,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2592, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2949, PETRI_PLACES=252, PETRI_TRANSITIONS=298} [2024-06-14 12:05:42,144 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-14 12:05:42,144 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 298 transitions, 2949 flow [2024-06-14 12:05:42,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:42,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:42,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:42,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 12:05:42,145 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:42,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:42,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1115696248, now seen corresponding path program 2 times [2024-06-14 12:05:42,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:42,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604883513] [2024-06-14 12:05:42,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:42,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:43,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:43,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604883513] [2024-06-14 12:05:43,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604883513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:43,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:43,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:05:43,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007134555] [2024-06-14 12:05:43,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:43,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:05:43,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:43,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:05:43,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:05:43,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:05:43,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 298 transitions, 2949 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:43,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:43,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:05:43,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:44,357 INFO L124 PetriNetUnfolderBase]: 3326/5082 cut-off events. [2024-06-14 12:05:44,357 INFO L125 PetriNetUnfolderBase]: For 553933/553933 co-relation queries the response was YES. [2024-06-14 12:05:44,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41850 conditions, 5082 events. 3326/5082 cut-off events. For 553933/553933 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 27207 event pairs, 905 based on Foata normal form. 2/5082 useless extension candidates. Maximal degree in co-relation 41728. Up to 4989 conditions per place. [2024-06-14 12:05:44,414 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 286 selfloop transitions, 42 changer transitions 0/331 dead transitions. [2024-06-14 12:05:44,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 331 transitions, 3717 flow [2024-06-14 12:05:44,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:05:44,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:05:44,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-14 12:05:44,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-14 12:05:44,415 INFO L175 Difference]: Start difference. First operand has 252 places, 298 transitions, 2949 flow. Second operand 10 states and 165 transitions. [2024-06-14 12:05:44,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 331 transitions, 3717 flow [2024-06-14 12:05:45,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 331 transitions, 3625 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-14 12:05:45,587 INFO L231 Difference]: Finished difference. Result has 258 places, 300 transitions, 2978 flow [2024-06-14 12:05:45,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2857, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2978, PETRI_PLACES=258, PETRI_TRANSITIONS=300} [2024-06-14 12:05:45,587 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-14 12:05:45,588 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 300 transitions, 2978 flow [2024-06-14 12:05:45,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:45,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:45,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:45,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 12:05:45,588 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:45,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:45,589 INFO L85 PathProgramCache]: Analyzing trace with hash -997605406, now seen corresponding path program 1 times [2024-06-14 12:05:45,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:45,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819682945] [2024-06-14 12:05:45,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:45,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:45,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:46,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:46,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:46,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819682945] [2024-06-14 12:05:46,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819682945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:46,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:46,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:05:46,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294691129] [2024-06-14 12:05:46,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:46,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:05:46,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:46,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:05:46,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:05:46,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:05:46,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 300 transitions, 2978 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:46,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:46,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:05:46,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:47,569 INFO L124 PetriNetUnfolderBase]: 3336/5097 cut-off events. [2024-06-14 12:05:47,569 INFO L125 PetriNetUnfolderBase]: For 567392/567394 co-relation queries the response was YES. [2024-06-14 12:05:47,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42060 conditions, 5097 events. 3336/5097 cut-off events. For 567392/567394 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 27370 event pairs, 837 based on Foata normal form. 2/5097 useless extension candidates. Maximal degree in co-relation 41936. Up to 4970 conditions per place. [2024-06-14 12:05:47,625 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 295 selfloop transitions, 30 changer transitions 0/328 dead transitions. [2024-06-14 12:05:47,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 328 transitions, 3766 flow [2024-06-14 12:05:47,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:05:47,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:05:47,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:05:47,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-14 12:05:47,626 INFO L175 Difference]: Start difference. First operand has 258 places, 300 transitions, 2978 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:05:47,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 328 transitions, 3766 flow [2024-06-14 12:05:48,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 328 transitions, 3665 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-14 12:05:48,330 INFO L231 Difference]: Finished difference. Result has 258 places, 303 transitions, 3017 flow [2024-06-14 12:05:48,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2877, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3017, PETRI_PLACES=258, PETRI_TRANSITIONS=303} [2024-06-14 12:05:48,330 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-14 12:05:48,330 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 303 transitions, 3017 flow [2024-06-14 12:05:48,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:48,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:48,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:48,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 12:05:48,331 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:48,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:48,331 INFO L85 PathProgramCache]: Analyzing trace with hash -997784152, now seen corresponding path program 3 times [2024-06-14 12:05:48,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:48,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056335096] [2024-06-14 12:05:48,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:48,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:49,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:49,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056335096] [2024-06-14 12:05:49,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056335096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:49,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:49,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:05:49,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579434104] [2024-06-14 12:05:49,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:49,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:05:49,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:49,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:05:49,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:05:49,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:05:49,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 303 transitions, 3017 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:49,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:49,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:05:49,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:50,319 INFO L124 PetriNetUnfolderBase]: 3349/5115 cut-off events. [2024-06-14 12:05:50,319 INFO L125 PetriNetUnfolderBase]: For 583033/583035 co-relation queries the response was YES. [2024-06-14 12:05:50,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42818 conditions, 5115 events. 3349/5115 cut-off events. For 583033/583035 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 27450 event pairs, 904 based on Foata normal form. 3/5116 useless extension candidates. Maximal degree in co-relation 42693. Up to 4942 conditions per place. [2024-06-14 12:05:50,372 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 261 selfloop transitions, 73 changer transitions 0/337 dead transitions. [2024-06-14 12:05:50,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 337 transitions, 4385 flow [2024-06-14 12:05:50,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:05:50,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:05:50,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:05:50,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-14 12:05:50,374 INFO L175 Difference]: Start difference. First operand has 258 places, 303 transitions, 3017 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:05:50,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 337 transitions, 4385 flow [2024-06-14 12:05:51,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 337 transitions, 4267 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 12:05:51,332 INFO L231 Difference]: Finished difference. Result has 260 places, 312 transitions, 3243 flow [2024-06-14 12:05:51,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2899, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3243, PETRI_PLACES=260, PETRI_TRANSITIONS=312} [2024-06-14 12:05:51,333 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-14 12:05:51,333 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 312 transitions, 3243 flow [2024-06-14 12:05:51,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:51,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:51,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:51,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 12:05:51,334 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:51,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:51,334 INFO L85 PathProgramCache]: Analyzing trace with hash -997485436, now seen corresponding path program 2 times [2024-06-14 12:05:51,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:51,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289289082] [2024-06-14 12:05:51,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:51,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:51,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:52,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:52,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:52,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289289082] [2024-06-14 12:05:52,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289289082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:52,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:52,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:05:52,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705673550] [2024-06-14 12:05:52,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:52,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:05:52,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:52,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:05:52,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:05:52,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:05:52,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 312 transitions, 3243 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:52,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:52,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:05:52,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:53,316 INFO L124 PetriNetUnfolderBase]: 3383/5162 cut-off events. [2024-06-14 12:05:53,317 INFO L125 PetriNetUnfolderBase]: For 613043/613045 co-relation queries the response was YES. [2024-06-14 12:05:53,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44020 conditions, 5162 events. 3383/5162 cut-off events. For 613043/613045 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 27712 event pairs, 838 based on Foata normal form. 2/5162 useless extension candidates. Maximal degree in co-relation 43894. Up to 4949 conditions per place. [2024-06-14 12:05:53,369 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 287 selfloop transitions, 63 changer transitions 0/353 dead transitions. [2024-06-14 12:05:53,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 353 transitions, 4588 flow [2024-06-14 12:05:53,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:05:53,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:05:53,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:05:53,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-14 12:05:53,371 INFO L175 Difference]: Start difference. First operand has 260 places, 312 transitions, 3243 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:05:53,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 353 transitions, 4588 flow [2024-06-14 12:05:54,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 353 transitions, 4407 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-14 12:05:54,211 INFO L231 Difference]: Finished difference. Result has 264 places, 328 transitions, 3504 flow [2024-06-14 12:05:54,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3068, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3504, PETRI_PLACES=264, PETRI_TRANSITIONS=328} [2024-06-14 12:05:54,211 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-14 12:05:54,211 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 328 transitions, 3504 flow [2024-06-14 12:05:54,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:54,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:54,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:54,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 12:05:54,212 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:54,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:54,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1704647302, now seen corresponding path program 4 times [2024-06-14 12:05:54,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:54,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354332057] [2024-06-14 12:05:54,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:54,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:54,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:54,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354332057] [2024-06-14 12:05:54,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354332057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:54,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:54,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:05:54,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261987300] [2024-06-14 12:05:54,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:54,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:05:54,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:54,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:05:54,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:05:55,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:05:55,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 328 transitions, 3504 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:55,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:55,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:05:55,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:56,118 INFO L124 PetriNetUnfolderBase]: 3388/5169 cut-off events. [2024-06-14 12:05:56,118 INFO L125 PetriNetUnfolderBase]: For 625219/625221 co-relation queries the response was YES. [2024-06-14 12:05:56,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44444 conditions, 5169 events. 3388/5169 cut-off events. For 625219/625221 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 27733 event pairs, 908 based on Foata normal form. 3/5170 useless extension candidates. Maximal degree in co-relation 44317. Up to 4995 conditions per place. [2024-06-14 12:05:56,172 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 274 selfloop transitions, 75 changer transitions 0/352 dead transitions. [2024-06-14 12:05:56,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 352 transitions, 4598 flow [2024-06-14 12:05:56,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:05:56,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:05:56,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:05:56,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-14 12:05:56,174 INFO L175 Difference]: Start difference. First operand has 264 places, 328 transitions, 3504 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:05:56,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 352 transitions, 4598 flow [2024-06-14 12:05:57,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 352 transitions, 4494 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-14 12:05:57,225 INFO L231 Difference]: Finished difference. Result has 270 places, 331 transitions, 3590 flow [2024-06-14 12:05:57,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3400, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3590, PETRI_PLACES=270, PETRI_TRANSITIONS=331} [2024-06-14 12:05:57,226 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-14 12:05:57,226 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 331 transitions, 3590 flow [2024-06-14 12:05:57,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:57,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:57,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:57,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 12:05:57,227 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:05:57,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:57,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1866347948, now seen corresponding path program 1 times [2024-06-14 12:05:57,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:57,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148836672] [2024-06-14 12:05:57,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:57,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:57,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:57,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:57,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:57,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148836672] [2024-06-14 12:05:57,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148836672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:57,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:57,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:05:57,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809153456] [2024-06-14 12:05:57,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:57,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:05:57,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:57,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:05:57,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:05:58,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:05:58,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 331 transitions, 3590 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:58,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:58,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:05:58,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:59,207 INFO L124 PetriNetUnfolderBase]: 3443/5245 cut-off events. [2024-06-14 12:05:59,207 INFO L125 PetriNetUnfolderBase]: For 661835/661837 co-relation queries the response was YES. [2024-06-14 12:05:59,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45602 conditions, 5245 events. 3443/5245 cut-off events. For 661835/661837 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 28143 event pairs, 900 based on Foata normal form. 5/5248 useless extension candidates. Maximal degree in co-relation 45472. Up to 5050 conditions per place. [2024-06-14 12:05:59,264 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 311 selfloop transitions, 60 changer transitions 0/374 dead transitions. [2024-06-14 12:05:59,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 374 transitions, 4925 flow [2024-06-14 12:05:59,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:05:59,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:05:59,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:05:59,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:05:59,265 INFO L175 Difference]: Start difference. First operand has 270 places, 331 transitions, 3590 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:05:59,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 374 transitions, 4925 flow [2024-06-14 12:06:00,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 374 transitions, 4785 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 12:06:00,492 INFO L231 Difference]: Finished difference. Result has 274 places, 347 transitions, 3812 flow [2024-06-14 12:06:00,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3450, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3812, PETRI_PLACES=274, PETRI_TRANSITIONS=347} [2024-06-14 12:06:00,493 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-14 12:06:00,493 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 347 transitions, 3812 flow [2024-06-14 12:06:00,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:00,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:00,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:00,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 12:06:00,494 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:00,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:00,494 INFO L85 PathProgramCache]: Analyzing trace with hash 2043479096, now seen corresponding path program 5 times [2024-06-14 12:06:00,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:00,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730445624] [2024-06-14 12:06:00,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:00,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:00,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:01,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:01,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730445624] [2024-06-14 12:06:01,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730445624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:01,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:01,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:06:01,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614182115] [2024-06-14 12:06:01,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:01,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:06:01,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:01,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:06:01,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:06:01,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:06:01,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 347 transitions, 3812 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:01,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:01,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:06:01,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:02,491 INFO L124 PetriNetUnfolderBase]: 3464/5274 cut-off events. [2024-06-14 12:06:02,491 INFO L125 PetriNetUnfolderBase]: For 680404/680406 co-relation queries the response was YES. [2024-06-14 12:06:02,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46733 conditions, 5274 events. 3464/5274 cut-off events. For 680404/680406 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28299 event pairs, 895 based on Foata normal form. 3/5275 useless extension candidates. Maximal degree in co-relation 46601. Up to 5095 conditions per place. [2024-06-14 12:06:02,553 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 288 selfloop transitions, 84 changer transitions 0/375 dead transitions. [2024-06-14 12:06:02,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 375 transitions, 5209 flow [2024-06-14 12:06:02,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:06:02,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:06:02,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:06:02,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 12:06:02,555 INFO L175 Difference]: Start difference. First operand has 274 places, 347 transitions, 3812 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:06:02,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 375 transitions, 5209 flow [2024-06-14 12:06:04,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 375 transitions, 5129 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-14 12:06:04,125 INFO L231 Difference]: Finished difference. Result has 280 places, 356 transitions, 4037 flow [2024-06-14 12:06:04,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3732, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4037, PETRI_PLACES=280, PETRI_TRANSITIONS=356} [2024-06-14 12:06:04,126 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-14 12:06:04,126 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 356 transitions, 4037 flow [2024-06-14 12:06:04,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:04,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:04,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:04,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 12:06:04,127 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:04,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:04,127 INFO L85 PathProgramCache]: Analyzing trace with hash -820474072, now seen corresponding path program 6 times [2024-06-14 12:06:04,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:04,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959431286] [2024-06-14 12:06:04,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:04,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:04,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:05,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:05,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:05,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959431286] [2024-06-14 12:06:05,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959431286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:05,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:05,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:06:05,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447803684] [2024-06-14 12:06:05,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:05,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:06:05,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:05,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:06:05,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:06:05,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:06:05,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 356 transitions, 4037 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:05,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:05,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:06:05,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:06,252 INFO L124 PetriNetUnfolderBase]: 3461/5269 cut-off events. [2024-06-14 12:06:06,252 INFO L125 PetriNetUnfolderBase]: For 692193/692193 co-relation queries the response was YES. [2024-06-14 12:06:06,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46735 conditions, 5269 events. 3461/5269 cut-off events. For 692193/692193 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28247 event pairs, 892 based on Foata normal form. 1/5268 useless extension candidates. Maximal degree in co-relation 46600. Up to 5205 conditions per place. [2024-06-14 12:06:06,320 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 339 selfloop transitions, 30 changer transitions 0/372 dead transitions. [2024-06-14 12:06:06,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 372 transitions, 4817 flow [2024-06-14 12:06:06,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:06:06,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:06:06,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 12:06:06,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-14 12:06:06,321 INFO L175 Difference]: Start difference. First operand has 280 places, 356 transitions, 4037 flow. Second operand 8 states and 129 transitions. [2024-06-14 12:06:06,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 372 transitions, 4817 flow [2024-06-14 12:06:08,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 372 transitions, 4686 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-14 12:06:08,133 INFO L231 Difference]: Finished difference. Result has 285 places, 356 transitions, 3972 flow [2024-06-14 12:06:08,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3906, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3972, PETRI_PLACES=285, PETRI_TRANSITIONS=356} [2024-06-14 12:06:08,134 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-14 12:06:08,134 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 356 transitions, 3972 flow [2024-06-14 12:06:08,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:08,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:08,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:08,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 12:06:08,134 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:08,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:08,135 INFO L85 PathProgramCache]: Analyzing trace with hash -820116580, now seen corresponding path program 2 times [2024-06-14 12:06:08,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:08,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399321268] [2024-06-14 12:06:08,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:08,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:08,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:08,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399321268] [2024-06-14 12:06:08,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399321268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:08,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:08,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:06:08,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938938501] [2024-06-14 12:06:08,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:08,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:06:08,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:08,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:06:08,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:06:09,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:06:09,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 356 transitions, 3972 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:09,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:09,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:06:09,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:10,076 INFO L124 PetriNetUnfolderBase]: 3524/5357 cut-off events. [2024-06-14 12:06:10,076 INFO L125 PetriNetUnfolderBase]: For 735780/735782 co-relation queries the response was YES. [2024-06-14 12:06:10,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47842 conditions, 5357 events. 3524/5357 cut-off events. For 735780/735782 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 28767 event pairs, 898 based on Foata normal form. 5/5360 useless extension candidates. Maximal degree in co-relation 47706. Up to 5131 conditions per place. [2024-06-14 12:06:10,146 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 317 selfloop transitions, 70 changer transitions 0/390 dead transitions. [2024-06-14 12:06:10,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 390 transitions, 5285 flow [2024-06-14 12:06:10,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:06:10,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:06:10,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 12:06:10,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-14 12:06:10,148 INFO L175 Difference]: Start difference. First operand has 285 places, 356 transitions, 3972 flow. Second operand 8 states and 141 transitions. [2024-06-14 12:06:10,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 390 transitions, 5285 flow [2024-06-14 12:06:11,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 390 transitions, 5217 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 12:06:12,002 INFO L231 Difference]: Finished difference. Result has 286 places, 366 transitions, 4189 flow [2024-06-14 12:06:12,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3904, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4189, PETRI_PLACES=286, PETRI_TRANSITIONS=366} [2024-06-14 12:06:12,003 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-14 12:06:12,003 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 366 transitions, 4189 flow [2024-06-14 12:06:12,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:12,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:12,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:12,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 12:06:12,004 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:12,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:12,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1551527482, now seen corresponding path program 3 times [2024-06-14 12:06:12,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:12,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976629106] [2024-06-14 12:06:12,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:12,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:12,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:12,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:12,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976629106] [2024-06-14 12:06:12,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976629106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:12,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:12,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:06:12,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095077119] [2024-06-14 12:06:12,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:12,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:06:12,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:12,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:06:12,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:06:12,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:06:12,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 366 transitions, 4189 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:12,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:12,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:06:12,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:13,920 INFO L124 PetriNetUnfolderBase]: 3515/5345 cut-off events. [2024-06-14 12:06:13,921 INFO L125 PetriNetUnfolderBase]: For 743186/743188 co-relation queries the response was YES. [2024-06-14 12:06:13,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47924 conditions, 5345 events. 3515/5345 cut-off events. For 743186/743188 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 28731 event pairs, 892 based on Foata normal form. 5/5348 useless extension candidates. Maximal degree in co-relation 47787. Up to 5124 conditions per place. [2024-06-14 12:06:13,993 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 321 selfloop transitions, 68 changer transitions 0/392 dead transitions. [2024-06-14 12:06:13,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 392 transitions, 5381 flow [2024-06-14 12:06:13,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:06:13,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:06:13,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:06:13,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:06:13,995 INFO L175 Difference]: Start difference. First operand has 286 places, 366 transitions, 4189 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:06:13,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 392 transitions, 5381 flow [2024-06-14 12:06:15,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 392 transitions, 5241 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 12:06:15,741 INFO L231 Difference]: Finished difference. Result has 290 places, 366 transitions, 4191 flow [2024-06-14 12:06:15,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4049, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4191, PETRI_PLACES=290, PETRI_TRANSITIONS=366} [2024-06-14 12:06:15,742 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-14 12:06:15,742 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 366 transitions, 4191 flow [2024-06-14 12:06:15,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:15,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:15,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:15,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 12:06:15,743 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:15,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:15,743 INFO L85 PathProgramCache]: Analyzing trace with hash -820353916, now seen corresponding path program 3 times [2024-06-14 12:06:15,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:15,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596938295] [2024-06-14 12:06:15,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:15,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:15,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:16,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:16,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:16,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596938295] [2024-06-14 12:06:16,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596938295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:16,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:16,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:06:16,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501543821] [2024-06-14 12:06:16,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:16,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:06:16,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:16,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:06:16,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:06:16,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:06:16,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 366 transitions, 4191 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:16,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:16,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:06:16,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:17,843 INFO L124 PetriNetUnfolderBase]: 3541/5381 cut-off events. [2024-06-14 12:06:17,843 INFO L125 PetriNetUnfolderBase]: For 764512/764514 co-relation queries the response was YES. [2024-06-14 12:06:17,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48502 conditions, 5381 events. 3541/5381 cut-off events. For 764512/764514 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 28871 event pairs, 872 based on Foata normal form. 2/5381 useless extension candidates. Maximal degree in co-relation 48364. Up to 5157 conditions per place. [2024-06-14 12:06:17,922 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 319 selfloop transitions, 71 changer transitions 0/393 dead transitions. [2024-06-14 12:06:17,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 393 transitions, 5501 flow [2024-06-14 12:06:17,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:06:17,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:06:17,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:06:17,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-14 12:06:17,924 INFO L175 Difference]: Start difference. First operand has 290 places, 366 transitions, 4191 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:06:17,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 393 transitions, 5501 flow [2024-06-14 12:06:19,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 393 transitions, 5403 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 12:06:19,914 INFO L231 Difference]: Finished difference. Result has 294 places, 372 transitions, 4375 flow [2024-06-14 12:06:19,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4093, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4375, PETRI_PLACES=294, PETRI_TRANSITIONS=372} [2024-06-14 12:06:19,915 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-14 12:06:19,916 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 372 transitions, 4375 flow [2024-06-14 12:06:19,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:19,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:19,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:19,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 12:06:19,917 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:19,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:19,928 INFO L85 PathProgramCache]: Analyzing trace with hash 863183988, now seen corresponding path program 2 times [2024-06-14 12:06:19,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:19,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846298511] [2024-06-14 12:06:19,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:19,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:19,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:20,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:20,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:20,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846298511] [2024-06-14 12:06:20,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846298511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:20,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:20,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:06:20,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628052075] [2024-06-14 12:06:20,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:20,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:06:20,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:20,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:06:20,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:06:21,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:06:21,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 372 transitions, 4375 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:21,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:21,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:06:21,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:22,323 INFO L124 PetriNetUnfolderBase]: 3571/5422 cut-off events. [2024-06-14 12:06:22,323 INFO L125 PetriNetUnfolderBase]: For 786103/786103 co-relation queries the response was YES. [2024-06-14 12:06:22,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48971 conditions, 5422 events. 3571/5422 cut-off events. For 786103/786103 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 29144 event pairs, 887 based on Foata normal form. 3/5423 useless extension candidates. Maximal degree in co-relation 48832. Up to 5261 conditions per place. [2024-06-14 12:06:22,396 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 348 selfloop transitions, 52 changer transitions 0/403 dead transitions. [2024-06-14 12:06:22,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 403 transitions, 5331 flow [2024-06-14 12:06:22,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:06:22,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:06:22,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 12:06:22,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-14 12:06:22,398 INFO L175 Difference]: Start difference. First operand has 294 places, 372 transitions, 4375 flow. Second operand 9 states and 152 transitions. [2024-06-14 12:06:22,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 403 transitions, 5331 flow [2024-06-14 12:06:23,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 403 transitions, 5196 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-14 12:06:23,596 INFO L231 Difference]: Finished difference. Result has 299 places, 379 transitions, 4439 flow [2024-06-14 12:06:23,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4240, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4439, PETRI_PLACES=299, PETRI_TRANSITIONS=379} [2024-06-14 12:06:23,597 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-14 12:06:23,597 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 379 transitions, 4439 flow [2024-06-14 12:06:23,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:23,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:23,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:23,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 12:06:23,598 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:23,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:23,598 INFO L85 PathProgramCache]: Analyzing trace with hash -820466508, now seen corresponding path program 3 times [2024-06-14 12:06:23,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:23,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901854270] [2024-06-14 12:06:23,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:23,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:23,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:24,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:24,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901854270] [2024-06-14 12:06:24,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901854270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:24,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:24,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:06:24,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277246770] [2024-06-14 12:06:24,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:24,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:06:24,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:24,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:06:24,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:06:24,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:06:24,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 379 transitions, 4439 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:24,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:24,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:06:24,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:25,962 INFO L124 PetriNetUnfolderBase]: 3586/5443 cut-off events. [2024-06-14 12:06:25,962 INFO L125 PetriNetUnfolderBase]: For 804092/804092 co-relation queries the response was YES. [2024-06-14 12:06:26,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49307 conditions, 5443 events. 3586/5443 cut-off events. For 804092/804092 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 29269 event pairs, 887 based on Foata normal form. 3/5444 useless extension candidates. Maximal degree in co-relation 49167. Up to 5282 conditions per place. [2024-06-14 12:06:26,030 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 355 selfloop transitions, 51 changer transitions 0/409 dead transitions. [2024-06-14 12:06:26,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 409 transitions, 5403 flow [2024-06-14 12:06:26,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:06:26,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:06:26,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 12:06:26,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-14 12:06:26,031 INFO L175 Difference]: Start difference. First operand has 299 places, 379 transitions, 4439 flow. Second operand 9 states and 155 transitions. [2024-06-14 12:06:26,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 409 transitions, 5403 flow [2024-06-14 12:06:27,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 409 transitions, 5268 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 12:06:27,632 INFO L231 Difference]: Finished difference. Result has 302 places, 383 transitions, 4487 flow [2024-06-14 12:06:27,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4304, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4487, PETRI_PLACES=302, PETRI_TRANSITIONS=383} [2024-06-14 12:06:27,632 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-14 12:06:27,632 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 383 transitions, 4487 flow [2024-06-14 12:06:27,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:27,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:27,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:27,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 12:06:27,633 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:27,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:27,633 INFO L85 PathProgramCache]: Analyzing trace with hash -820477048, now seen corresponding path program 3 times [2024-06-14 12:06:27,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:27,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219021653] [2024-06-14 12:06:27,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:27,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:27,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:28,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:28,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:28,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219021653] [2024-06-14 12:06:28,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219021653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:28,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:28,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:06:28,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347910531] [2024-06-14 12:06:28,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:28,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:06:28,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:28,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:06:28,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:06:28,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:06:28,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 383 transitions, 4487 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:28,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:28,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:06:28,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:30,183 INFO L124 PetriNetUnfolderBase]: 3594/5455 cut-off events. [2024-06-14 12:06:30,184 INFO L125 PetriNetUnfolderBase]: For 817750/817750 co-relation queries the response was YES. [2024-06-14 12:06:30,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49542 conditions, 5455 events. 3594/5455 cut-off events. For 817750/817750 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 29330 event pairs, 909 based on Foata normal form. 2/5455 useless extension candidates. Maximal degree in co-relation 49401. Up to 5385 conditions per place. [2024-06-14 12:06:30,245 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 368 selfloop transitions, 32 changer transitions 0/403 dead transitions. [2024-06-14 12:06:30,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 403 transitions, 5365 flow [2024-06-14 12:06:30,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:06:30,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:06:30,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-14 12:06:30,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-14 12:06:30,246 INFO L175 Difference]: Start difference. First operand has 302 places, 383 transitions, 4487 flow. Second operand 9 states and 141 transitions. [2024-06-14 12:06:30,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 403 transitions, 5365 flow [2024-06-14 12:06:31,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 403 transitions, 5238 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 12:06:31,816 INFO L231 Difference]: Finished difference. Result has 306 places, 385 transitions, 4465 flow [2024-06-14 12:06:31,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4360, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4465, PETRI_PLACES=306, PETRI_TRANSITIONS=385} [2024-06-14 12:06:31,816 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-14 12:06:31,816 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 385 transitions, 4465 flow [2024-06-14 12:06:31,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:31,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:31,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:31,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 12:06:31,817 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:31,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:31,817 INFO L85 PathProgramCache]: Analyzing trace with hash -820476738, now seen corresponding path program 4 times [2024-06-14 12:06:31,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:31,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675306725] [2024-06-14 12:06:31,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:31,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:31,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:32,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:32,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:32,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675306725] [2024-06-14 12:06:32,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675306725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:32,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:32,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:06:32,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232937362] [2024-06-14 12:06:32,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:32,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:06:32,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:32,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:06:32,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:06:32,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:06:32,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 385 transitions, 4465 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:32,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:32,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:06:32,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:34,295 INFO L124 PetriNetUnfolderBase]: 3599/5462 cut-off events. [2024-06-14 12:06:34,295 INFO L125 PetriNetUnfolderBase]: For 831659/831659 co-relation queries the response was YES. [2024-06-14 12:06:34,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49635 conditions, 5462 events. 3599/5462 cut-off events. For 831659/831659 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 29377 event pairs, 889 based on Foata normal form. 1/5461 useless extension candidates. Maximal degree in co-relation 49493. Up to 5284 conditions per place. [2024-06-14 12:06:34,357 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 352 selfloop transitions, 61 changer transitions 0/416 dead transitions. [2024-06-14 12:06:34,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 416 transitions, 5440 flow [2024-06-14 12:06:34,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:06:34,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:06:34,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-14 12:06:34,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 12:06:34,359 INFO L175 Difference]: Start difference. First operand has 306 places, 385 transitions, 4465 flow. Second operand 10 states and 170 transitions. [2024-06-14 12:06:34,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 416 transitions, 5440 flow [2024-06-14 12:06:35,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 416 transitions, 5355 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 12:06:35,796 INFO L231 Difference]: Finished difference. Result has 309 places, 388 transitions, 4578 flow [2024-06-14 12:06:35,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4380, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4578, PETRI_PLACES=309, PETRI_TRANSITIONS=388} [2024-06-14 12:06:35,796 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-14 12:06:35,796 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 388 transitions, 4578 flow [2024-06-14 12:06:35,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:35,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:35,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:35,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 12:06:35,797 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:35,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:35,797 INFO L85 PathProgramCache]: Analyzing trace with hash -864703852, now seen corresponding path program 7 times [2024-06-14 12:06:35,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:35,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945121241] [2024-06-14 12:06:35,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:35,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:35,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:36,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:36,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:36,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945121241] [2024-06-14 12:06:36,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945121241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:36,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:36,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:06:36,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315286768] [2024-06-14 12:06:36,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:36,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:06:36,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:36,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:06:36,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:06:36,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:06:36,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 388 transitions, 4578 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:36,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:36,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:06:36,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:37,791 INFO L124 PetriNetUnfolderBase]: 3604/5469 cut-off events. [2024-06-14 12:06:37,791 INFO L125 PetriNetUnfolderBase]: For 849780/849780 co-relation queries the response was YES. [2024-06-14 12:06:37,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50021 conditions, 5469 events. 3604/5469 cut-off events. For 849780/849780 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 29396 event pairs, 907 based on Foata normal form. 1/5468 useless extension candidates. Maximal degree in co-relation 49878. Up to 5398 conditions per place. [2024-06-14 12:06:37,895 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 369 selfloop transitions, 39 changer transitions 0/411 dead transitions. [2024-06-14 12:06:37,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 411 transitions, 5671 flow [2024-06-14 12:06:37,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:06:37,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:06:37,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:06:37,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-14 12:06:37,896 INFO L175 Difference]: Start difference. First operand has 309 places, 388 transitions, 4578 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:06:37,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 411 transitions, 5671 flow [2024-06-14 12:06:39,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 411 transitions, 5520 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-14 12:06:39,626 INFO L231 Difference]: Finished difference. Result has 309 places, 391 transitions, 4562 flow [2024-06-14 12:06:39,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4427, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4562, PETRI_PLACES=309, PETRI_TRANSITIONS=391} [2024-06-14 12:06:39,627 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-14 12:06:39,627 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 391 transitions, 4562 flow [2024-06-14 12:06:39,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:39,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:39,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:39,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 12:06:39,628 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:39,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:39,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1722176090, now seen corresponding path program 4 times [2024-06-14 12:06:39,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:39,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183751932] [2024-06-14 12:06:39,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:39,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:40,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:40,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:40,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183751932] [2024-06-14 12:06:40,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183751932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:40,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:40,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:06:40,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526862157] [2024-06-14 12:06:40,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:40,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:06:40,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:40,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:06:40,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:06:40,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:06:40,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 391 transitions, 4562 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:40,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:40,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:06:40,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:41,798 INFO L124 PetriNetUnfolderBase]: 3614/5483 cut-off events. [2024-06-14 12:06:41,799 INFO L125 PetriNetUnfolderBase]: For 871893/871893 co-relation queries the response was YES. [2024-06-14 12:06:41,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50226 conditions, 5483 events. 3614/5483 cut-off events. For 871893/871893 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 29457 event pairs, 894 based on Foata normal form. 2/5483 useless extension candidates. Maximal degree in co-relation 50082. Up to 5399 conditions per place. [2024-06-14 12:06:41,880 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 390 selfloop transitions, 23 changer transitions 0/416 dead transitions. [2024-06-14 12:06:41,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 416 transitions, 5521 flow [2024-06-14 12:06:41,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:06:41,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:06:41,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:06:41,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-14 12:06:41,881 INFO L175 Difference]: Start difference. First operand has 309 places, 391 transitions, 4562 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:06:41,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 416 transitions, 5521 flow [2024-06-14 12:06:43,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 416 transitions, 5304 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-14 12:06:43,816 INFO L231 Difference]: Finished difference. Result has 309 places, 394 transitions, 4470 flow [2024-06-14 12:06:43,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4345, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4470, PETRI_PLACES=309, PETRI_TRANSITIONS=394} [2024-06-14 12:06:43,817 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-14 12:06:43,817 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 394 transitions, 4470 flow [2024-06-14 12:06:43,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:43,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:43,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:43,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 12:06:43,818 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:43,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:43,818 INFO L85 PathProgramCache]: Analyzing trace with hash -123534500, now seen corresponding path program 5 times [2024-06-14 12:06:43,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:43,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416727613] [2024-06-14 12:06:43,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:43,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:44,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:44,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416727613] [2024-06-14 12:06:44,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416727613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:44,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:44,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:06:44,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398351477] [2024-06-14 12:06:44,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:44,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:06:44,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:44,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:06:44,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:06:44,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:06:44,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 394 transitions, 4470 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:44,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:44,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:06:44,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:46,032 INFO L124 PetriNetUnfolderBase]: 3640/5519 cut-off events. [2024-06-14 12:06:46,032 INFO L125 PetriNetUnfolderBase]: For 899176/899176 co-relation queries the response was YES. [2024-06-14 12:06:46,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50750 conditions, 5519 events. 3640/5519 cut-off events. For 899176/899176 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 29716 event pairs, 894 based on Foata normal form. 2/5519 useless extension candidates. Maximal degree in co-relation 50607. Up to 5450 conditions per place. [2024-06-14 12:06:46,113 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 397 selfloop transitions, 24 changer transitions 0/424 dead transitions. [2024-06-14 12:06:46,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 424 transitions, 5711 flow [2024-06-14 12:06:46,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:06:46,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:06:46,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 12:06:46,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:06:46,115 INFO L175 Difference]: Start difference. First operand has 309 places, 394 transitions, 4470 flow. Second operand 9 states and 144 transitions. [2024-06-14 12:06:46,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 424 transitions, 5711 flow [2024-06-14 12:06:47,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 424 transitions, 5617 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 12:06:47,829 INFO L231 Difference]: Finished difference. Result has 314 places, 401 transitions, 4611 flow [2024-06-14 12:06:47,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4376, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4611, PETRI_PLACES=314, PETRI_TRANSITIONS=401} [2024-06-14 12:06:47,830 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-14 12:06:47,830 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 401 transitions, 4611 flow [2024-06-14 12:06:47,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:47,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:47,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:47,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 12:06:47,831 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:47,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:47,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1722180926, now seen corresponding path program 4 times [2024-06-14 12:06:47,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:47,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527978959] [2024-06-14 12:06:47,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:47,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:48,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:48,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:48,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527978959] [2024-06-14 12:06:48,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527978959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:48,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:48,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:06:48,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086244496] [2024-06-14 12:06:48,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:48,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:06:48,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:48,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:06:48,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:06:48,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:06:48,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 401 transitions, 4611 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:48,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:48,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:06:48,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:49,934 INFO L124 PetriNetUnfolderBase]: 3631/5507 cut-off events. [2024-06-14 12:06:49,934 INFO L125 PetriNetUnfolderBase]: For 909781/909781 co-relation queries the response was YES. [2024-06-14 12:06:50,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50627 conditions, 5507 events. 3631/5507 cut-off events. For 909781/909781 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 29667 event pairs, 896 based on Foata normal form. 3/5508 useless extension candidates. Maximal degree in co-relation 50481. Up to 5415 conditions per place. [2024-06-14 12:06:50,040 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 380 selfloop transitions, 39 changer transitions 0/422 dead transitions. [2024-06-14 12:06:50,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 422 transitions, 5693 flow [2024-06-14 12:06:50,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:06:50,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:06:50,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:06:50,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 12:06:50,042 INFO L175 Difference]: Start difference. First operand has 314 places, 401 transitions, 4611 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:06:50,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 422 transitions, 5693 flow [2024-06-14 12:06:51,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 422 transitions, 5567 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-14 12:06:51,836 INFO L231 Difference]: Finished difference. Result has 317 places, 401 transitions, 4569 flow [2024-06-14 12:06:51,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4485, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4569, PETRI_PLACES=317, PETRI_TRANSITIONS=401} [2024-06-14 12:06:51,837 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-14 12:06:51,837 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 401 transitions, 4569 flow [2024-06-14 12:06:51,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:51,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:51,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:51,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 12:06:51,838 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:51,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:51,840 INFO L85 PathProgramCache]: Analyzing trace with hash -625484416, now seen corresponding path program 6 times [2024-06-14 12:06:51,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:51,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594555554] [2024-06-14 12:06:51,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:51,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:51,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:52,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:52,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594555554] [2024-06-14 12:06:52,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594555554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:52,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:52,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:06:52,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703530258] [2024-06-14 12:06:52,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:52,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:06:52,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:52,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:06:52,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:06:52,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:06:52,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 401 transitions, 4569 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:52,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:52,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:06:52,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:54,126 INFO L124 PetriNetUnfolderBase]: 3625/5499 cut-off events. [2024-06-14 12:06:54,127 INFO L125 PetriNetUnfolderBase]: For 914926/914926 co-relation queries the response was YES. [2024-06-14 12:06:54,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50464 conditions, 5499 events. 3625/5499 cut-off events. For 914926/914926 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 29590 event pairs, 893 based on Foata normal form. 2/5499 useless extension candidates. Maximal degree in co-relation 50317. Up to 5459 conditions per place. [2024-06-14 12:06:54,192 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 397 selfloop transitions, 18 changer transitions 0/418 dead transitions. [2024-06-14 12:06:54,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 418 transitions, 5445 flow [2024-06-14 12:06:54,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:06:54,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:06:54,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 12:06:54,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 12:06:54,193 INFO L175 Difference]: Start difference. First operand has 317 places, 401 transitions, 4569 flow. Second operand 8 states and 126 transitions. [2024-06-14 12:06:54,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 418 transitions, 5445 flow [2024-06-14 12:06:55,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 418 transitions, 5289 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-14 12:06:56,004 INFO L231 Difference]: Finished difference. Result has 318 places, 401 transitions, 4455 flow [2024-06-14 12:06:56,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4413, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4455, PETRI_PLACES=318, PETRI_TRANSITIONS=401} [2024-06-14 12:06:56,004 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-14 12:06:56,005 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 401 transitions, 4455 flow [2024-06-14 12:06:56,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:56,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:56,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:56,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 12:06:56,005 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:06:56,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:56,006 INFO L85 PathProgramCache]: Analyzing trace with hash -129670826, now seen corresponding path program 8 times [2024-06-14 12:06:56,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:56,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56579473] [2024-06-14 12:06:56,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:56,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:56,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:56,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:56,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56579473] [2024-06-14 12:06:56,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56579473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:56,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:56,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:06:56,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973187197] [2024-06-14 12:06:56,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:56,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:06:56,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:56,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:06:56,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:06:56,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:06:56,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 401 transitions, 4455 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:56,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:56,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:06:56,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:58,007 INFO L124 PetriNetUnfolderBase]: 3622/5495 cut-off events. [2024-06-14 12:06:58,007 INFO L125 PetriNetUnfolderBase]: For 923990/923990 co-relation queries the response was YES. [2024-06-14 12:06:58,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50394 conditions, 5495 events. 3622/5495 cut-off events. For 923990/923990 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 29559 event pairs, 894 based on Foata normal form. 1/5494 useless extension candidates. Maximal degree in co-relation 50248. Up to 5425 conditions per place. [2024-06-14 12:06:58,085 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 378 selfloop transitions, 37 changer transitions 0/418 dead transitions. [2024-06-14 12:06:58,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 418 transitions, 5513 flow [2024-06-14 12:06:58,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:06:58,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:06:58,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:06:58,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-14 12:06:58,086 INFO L175 Difference]: Start difference. First operand has 318 places, 401 transitions, 4455 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:06:58,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 418 transitions, 5513 flow [2024-06-14 12:07:00,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 418 transitions, 5455 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 12:07:00,199 INFO L231 Difference]: Finished difference. Result has 320 places, 401 transitions, 4477 flow [2024-06-14 12:07:00,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4397, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4477, PETRI_PLACES=320, PETRI_TRANSITIONS=401} [2024-06-14 12:07:00,199 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-14 12:07:00,199 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 401 transitions, 4477 flow [2024-06-14 12:07:00,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:00,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:00,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:00,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 12:07:00,200 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:07:00,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:00,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1722180740, now seen corresponding path program 7 times [2024-06-14 12:07:00,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:00,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891323741] [2024-06-14 12:07:00,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:00,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:00,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:00,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:00,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891323741] [2024-06-14 12:07:00,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891323741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:00,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:00,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:00,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128647034] [2024-06-14 12:07:00,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:00,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:00,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:00,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:00,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:01,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:07:01,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 401 transitions, 4477 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:01,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:01,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:07:01,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:02,265 INFO L124 PetriNetUnfolderBase]: 3616/5487 cut-off events. [2024-06-14 12:07:02,265 INFO L125 PetriNetUnfolderBase]: For 938470/938470 co-relation queries the response was YES. [2024-06-14 12:07:02,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50352 conditions, 5487 events. 3616/5487 cut-off events. For 938470/938470 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 29540 event pairs, 884 based on Foata normal form. 2/5487 useless extension candidates. Maximal degree in co-relation 50205. Up to 5341 conditions per place. [2024-06-14 12:07:02,345 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 365 selfloop transitions, 53 changer transitions 0/421 dead transitions. [2024-06-14 12:07:02,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 421 transitions, 5561 flow [2024-06-14 12:07:02,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:07:02,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:07:02,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:07:02,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-14 12:07:02,347 INFO L175 Difference]: Start difference. First operand has 320 places, 401 transitions, 4477 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:07:02,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 421 transitions, 5561 flow [2024-06-14 12:07:05,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 421 transitions, 5440 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 12:07:05,469 INFO L231 Difference]: Finished difference. Result has 322 places, 401 transitions, 4468 flow [2024-06-14 12:07:05,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4356, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4468, PETRI_PLACES=322, PETRI_TRANSITIONS=401} [2024-06-14 12:07:05,469 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-14 12:07:05,469 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 401 transitions, 4468 flow [2024-06-14 12:07:05,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:05,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:05,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:05,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 12:07:05,470 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:07:05,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:05,470 INFO L85 PathProgramCache]: Analyzing trace with hash 2076859676, now seen corresponding path program 5 times [2024-06-14 12:07:05,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:05,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871488004] [2024-06-14 12:07:05,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:05,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:05,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:06,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:06,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871488004] [2024-06-14 12:07:06,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871488004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:06,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:06,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:06,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148261838] [2024-06-14 12:07:06,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:06,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:06,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:06,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:06,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:06,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:07:06,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 401 transitions, 4468 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:06,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:06,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:07:06,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:07,602 INFO L124 PetriNetUnfolderBase]: 3631/5508 cut-off events. [2024-06-14 12:07:07,603 INFO L125 PetriNetUnfolderBase]: For 962217/962217 co-relation queries the response was YES. [2024-06-14 12:07:07,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50733 conditions, 5508 events. 3631/5508 cut-off events. For 962217/962217 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 29641 event pairs, 898 based on Foata normal form. 3/5509 useless extension candidates. Maximal degree in co-relation 50585. Up to 5456 conditions per place. [2024-06-14 12:07:07,690 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 388 selfloop transitions, 29 changer transitions 0/420 dead transitions. [2024-06-14 12:07:07,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 420 transitions, 5397 flow [2024-06-14 12:07:07,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:07:07,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:07:07,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:07:07,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:07:07,691 INFO L175 Difference]: Start difference. First operand has 322 places, 401 transitions, 4468 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:07:07,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 420 transitions, 5397 flow [2024-06-14 12:07:10,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 420 transitions, 5203 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 12:07:10,989 INFO L231 Difference]: Finished difference. Result has 323 places, 405 transitions, 4397 flow [2024-06-14 12:07:10,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4274, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4397, PETRI_PLACES=323, PETRI_TRANSITIONS=405} [2024-06-14 12:07:10,990 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-14 12:07:10,990 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 405 transitions, 4397 flow [2024-06-14 12:07:10,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:10,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:10,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:10,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 12:07:10,991 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:07:10,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:10,991 INFO L85 PathProgramCache]: Analyzing trace with hash 2076443780, now seen corresponding path program 8 times [2024-06-14 12:07:10,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:10,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844969803] [2024-06-14 12:07:10,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:10,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:10,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:11,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:11,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844969803] [2024-06-14 12:07:11,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844969803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:11,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:11,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:11,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281845265] [2024-06-14 12:07:11,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:11,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:11,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:11,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:11,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:11,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:07:11,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 405 transitions, 4397 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:11,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:11,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:07:11,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:13,031 INFO L124 PetriNetUnfolderBase]: 3657/5544 cut-off events. [2024-06-14 12:07:13,031 INFO L125 PetriNetUnfolderBase]: For 986269/986269 co-relation queries the response was YES. [2024-06-14 12:07:13,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51281 conditions, 5544 events. 3657/5544 cut-off events. For 986269/986269 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 29860 event pairs, 898 based on Foata normal form. 2/5544 useless extension candidates. Maximal degree in co-relation 51133. Up to 5471 conditions per place. [2024-06-14 12:07:13,113 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 387 selfloop transitions, 38 changer transitions 0/428 dead transitions. [2024-06-14 12:07:13,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 428 transitions, 5636 flow [2024-06-14 12:07:13,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:07:13,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:07:13,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:07:13,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-14 12:07:13,114 INFO L175 Difference]: Start difference. First operand has 323 places, 405 transitions, 4397 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:07:13,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 428 transitions, 5636 flow [2024-06-14 12:07:15,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 428 transitions, 5532 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 12:07:15,871 INFO L231 Difference]: Finished difference. Result has 325 places, 412 transitions, 4532 flow [2024-06-14 12:07:15,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4293, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4532, PETRI_PLACES=325, PETRI_TRANSITIONS=412} [2024-06-14 12:07:15,872 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-14 12:07:15,872 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 412 transitions, 4532 flow [2024-06-14 12:07:15,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:15,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:15,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:15,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 12:07:15,873 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:07:15,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:15,873 INFO L85 PathProgramCache]: Analyzing trace with hash -510430210, now seen corresponding path program 6 times [2024-06-14 12:07:15,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:15,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335834066] [2024-06-14 12:07:15,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:15,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:15,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:16,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:16,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335834066] [2024-06-14 12:07:16,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335834066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:16,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:16,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:16,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581196374] [2024-06-14 12:07:16,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:16,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:16,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:16,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:16,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:16,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:07:16,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 412 transitions, 4532 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:16,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:16,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:07:16,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:17,939 INFO L124 PetriNetUnfolderBase]: 3672/5565 cut-off events. [2024-06-14 12:07:17,939 INFO L125 PetriNetUnfolderBase]: For 1010188/1010188 co-relation queries the response was YES. [2024-06-14 12:07:17,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51462 conditions, 5565 events. 3672/5565 cut-off events. For 1010188/1010188 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 29980 event pairs, 895 based on Foata normal form. 3/5566 useless extension candidates. Maximal degree in co-relation 51314. Up to 5501 conditions per place. [2024-06-14 12:07:18,019 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 395 selfloop transitions, 34 changer transitions 0/432 dead transitions. [2024-06-14 12:07:18,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 432 transitions, 5496 flow [2024-06-14 12:07:18,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:07:18,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:07:18,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:07:18,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-14 12:07:18,020 INFO L175 Difference]: Start difference. First operand has 325 places, 412 transitions, 4532 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:07:18,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 432 transitions, 5496 flow [2024-06-14 12:07:20,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 432 transitions, 5403 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-14 12:07:20,934 INFO L231 Difference]: Finished difference. Result has 330 places, 415 transitions, 4573 flow [2024-06-14 12:07:20,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4439, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4573, PETRI_PLACES=330, PETRI_TRANSITIONS=415} [2024-06-14 12:07:20,935 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-14 12:07:20,935 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 415 transitions, 4573 flow [2024-06-14 12:07:20,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:20,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:20,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:20,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 12:07:20,935 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:07:20,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:20,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1732357544, now seen corresponding path program 9 times [2024-06-14 12:07:20,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:20,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246645684] [2024-06-14 12:07:20,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:20,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:20,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:21,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:21,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:21,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246645684] [2024-06-14 12:07:21,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246645684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:21,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:21,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:21,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180015315] [2024-06-14 12:07:21,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:21,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:21,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:21,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:21,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:21,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:07:21,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 415 transitions, 4573 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:21,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:21,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:07:21,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:23,008 INFO L124 PetriNetUnfolderBase]: 3677/5572 cut-off events. [2024-06-14 12:07:23,008 INFO L125 PetriNetUnfolderBase]: For 1019984/1019984 co-relation queries the response was YES. [2024-06-14 12:07:23,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51731 conditions, 5572 events. 3677/5572 cut-off events. For 1019984/1019984 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 29994 event pairs, 898 based on Foata normal form. 1/5571 useless extension candidates. Maximal degree in co-relation 51581. Up to 5535 conditions per place. [2024-06-14 12:07:23,088 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 405 selfloop transitions, 23 changer transitions 0/431 dead transitions. [2024-06-14 12:07:23,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 431 transitions, 5503 flow [2024-06-14 12:07:23,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:07:23,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:07:23,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 12:07:23,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-14 12:07:23,089 INFO L175 Difference]: Start difference. First operand has 330 places, 415 transitions, 4573 flow. Second operand 8 states and 124 transitions. [2024-06-14 12:07:23,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 431 transitions, 5503 flow [2024-06-14 12:07:26,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 431 transitions, 5403 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 12:07:26,194 INFO L231 Difference]: Finished difference. Result has 332 places, 418 transitions, 4573 flow [2024-06-14 12:07:26,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4473, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4573, PETRI_PLACES=332, PETRI_TRANSITIONS=418} [2024-06-14 12:07:26,195 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-14 12:07:26,195 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 418 transitions, 4573 flow [2024-06-14 12:07:26,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:26,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:26,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:26,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 12:07:26,195 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:07:26,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:26,196 INFO L85 PathProgramCache]: Analyzing trace with hash 2076680930, now seen corresponding path program 9 times [2024-06-14 12:07:26,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:26,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447164803] [2024-06-14 12:07:26,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:26,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:26,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:26,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:26,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447164803] [2024-06-14 12:07:26,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447164803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:26,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:26,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:26,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113788207] [2024-06-14 12:07:26,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:26,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:26,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:26,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:26,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:27,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:07:27,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 418 transitions, 4573 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:27,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:27,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:07:27,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:28,439 INFO L124 PetriNetUnfolderBase]: 3671/5564 cut-off events. [2024-06-14 12:07:28,440 INFO L125 PetriNetUnfolderBase]: For 1034015/1034015 co-relation queries the response was YES. [2024-06-14 12:07:28,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51554 conditions, 5564 events. 3671/5564 cut-off events. For 1034015/1034015 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 29956 event pairs, 897 based on Foata normal form. 2/5564 useless extension candidates. Maximal degree in co-relation 51403. Up to 5509 conditions per place. [2024-06-14 12:07:28,521 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 399 selfloop transitions, 30 changer transitions 0/432 dead transitions. [2024-06-14 12:07:28,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 432 transitions, 5469 flow [2024-06-14 12:07:28,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:07:28,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:07:28,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 12:07:28,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-14 12:07:28,523 INFO L175 Difference]: Start difference. First operand has 332 places, 418 transitions, 4573 flow. Second operand 8 states and 127 transitions. [2024-06-14 12:07:28,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 432 transitions, 5469 flow [2024-06-14 12:07:31,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 432 transitions, 5365 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 12:07:31,842 INFO L231 Difference]: Finished difference. Result has 334 places, 418 transitions, 4535 flow [2024-06-14 12:07:31,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4469, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4535, PETRI_PLACES=334, PETRI_TRANSITIONS=418} [2024-06-14 12:07:31,843 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-14 12:07:31,843 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 418 transitions, 4535 flow [2024-06-14 12:07:31,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:31,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:31,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:31,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 12:07:31,844 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:07:31,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:31,844 INFO L85 PathProgramCache]: Analyzing trace with hash 570734168, now seen corresponding path program 7 times [2024-06-14 12:07:31,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:31,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396287462] [2024-06-14 12:07:31,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:31,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:31,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:32,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:32,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:32,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396287462] [2024-06-14 12:07:32,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396287462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:32,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:32,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:32,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595639718] [2024-06-14 12:07:32,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:32,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:32,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:32,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:32,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:32,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:07:32,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 418 transitions, 4535 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:32,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:32,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:07:32,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:33,926 INFO L124 PetriNetUnfolderBase]: 3686/5586 cut-off events. [2024-06-14 12:07:33,927 INFO L125 PetriNetUnfolderBase]: For 1059449/1059451 co-relation queries the response was YES. [2024-06-14 12:07:33,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51877 conditions, 5586 events. 3686/5586 cut-off events. For 1059449/1059451 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 30136 event pairs, 900 based on Foata normal form. 5/5589 useless extension candidates. Maximal degree in co-relation 51725. Up to 5533 conditions per place. [2024-06-14 12:07:34,008 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 400 selfloop transitions, 31 changer transitions 0/434 dead transitions. [2024-06-14 12:07:34,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 434 transitions, 5496 flow [2024-06-14 12:07:34,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:07:34,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:07:34,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 12:07:34,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-14 12:07:34,010 INFO L175 Difference]: Start difference. First operand has 334 places, 418 transitions, 4535 flow. Second operand 8 states and 124 transitions. [2024-06-14 12:07:34,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 434 transitions, 5496 flow [2024-06-14 12:07:36,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 434 transitions, 5404 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-14 12:07:36,525 INFO L231 Difference]: Finished difference. Result has 334 places, 422 transitions, 4582 flow [2024-06-14 12:07:36,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4443, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4582, PETRI_PLACES=334, PETRI_TRANSITIONS=422} [2024-06-14 12:07:36,525 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-14 12:07:36,525 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 422 transitions, 4582 flow [2024-06-14 12:07:36,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:36,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:36,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:36,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 12:07:36,526 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:07:36,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:36,527 INFO L85 PathProgramCache]: Analyzing trace with hash -344791262, now seen corresponding path program 10 times [2024-06-14 12:07:36,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:36,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357301105] [2024-06-14 12:07:36,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:36,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:36,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:37,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:37,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:37,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357301105] [2024-06-14 12:07:37,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357301105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:37,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:37,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:37,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904414907] [2024-06-14 12:07:37,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:37,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:37,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:37,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:37,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:37,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:07:37,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 422 transitions, 4582 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:37,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:37,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:07:37,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:38,719 INFO L124 PetriNetUnfolderBase]: 3696/5600 cut-off events. [2024-06-14 12:07:38,719 INFO L125 PetriNetUnfolderBase]: For 1075292/1075294 co-relation queries the response was YES. [2024-06-14 12:07:38,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52214 conditions, 5600 events. 3696/5600 cut-off events. For 1075292/1075294 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 30211 event pairs, 904 based on Foata normal form. 2/5600 useless extension candidates. Maximal degree in co-relation 52062. Up to 5532 conditions per place. [2024-06-14 12:07:38,804 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 400 selfloop transitions, 35 changer transitions 0/438 dead transitions. [2024-06-14 12:07:38,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 438 transitions, 5769 flow [2024-06-14 12:07:38,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:07:38,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:07:38,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:07:38,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:07:38,806 INFO L175 Difference]: Start difference. First operand has 334 places, 422 transitions, 4582 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:07:38,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 438 transitions, 5769 flow [2024-06-14 12:07:42,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 438 transitions, 5685 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 12:07:42,674 INFO L231 Difference]: Finished difference. Result has 338 places, 425 transitions, 4651 flow [2024-06-14 12:07:42,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4498, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4651, PETRI_PLACES=338, PETRI_TRANSITIONS=425} [2024-06-14 12:07:42,674 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-14 12:07:42,674 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 425 transitions, 4651 flow [2024-06-14 12:07:42,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:42,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:42,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:42,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 12:07:42,675 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:07:42,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:42,675 INFO L85 PathProgramCache]: Analyzing trace with hash -118873642, now seen corresponding path program 8 times [2024-06-14 12:07:42,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:42,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062755448] [2024-06-14 12:07:42,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:42,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:42,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:43,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:43,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:43,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062755448] [2024-06-14 12:07:43,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062755448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:43,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:43,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:43,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429073188] [2024-06-14 12:07:43,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:43,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:43,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:43,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:43,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:43,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:07:43,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 425 transitions, 4651 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:43,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:43,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:07:43,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:44,819 INFO L124 PetriNetUnfolderBase]: 3735/5654 cut-off events. [2024-06-14 12:07:44,819 INFO L125 PetriNetUnfolderBase]: For 1117335/1117337 co-relation queries the response was YES. [2024-06-14 12:07:44,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53061 conditions, 5654 events. 3735/5654 cut-off events. For 1117335/1117337 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30534 event pairs, 894 based on Foata normal form. 5/5657 useless extension candidates. Maximal degree in co-relation 52908. Up to 5556 conditions per place. [2024-06-14 12:07:44,905 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 402 selfloop transitions, 42 changer transitions 0/447 dead transitions. [2024-06-14 12:07:44,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 447 transitions, 5912 flow [2024-06-14 12:07:44,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:07:44,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:07:44,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:07:44,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:07:44,906 INFO L175 Difference]: Start difference. First operand has 338 places, 425 transitions, 4651 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:07:44,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 447 transitions, 5912 flow [2024-06-14 12:07:47,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 447 transitions, 5695 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-14 12:07:47,462 INFO L231 Difference]: Finished difference. Result has 339 places, 432 transitions, 4677 flow [2024-06-14 12:07:47,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4434, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4677, PETRI_PLACES=339, PETRI_TRANSITIONS=432} [2024-06-14 12:07:47,476 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-14 12:07:47,476 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 432 transitions, 4677 flow [2024-06-14 12:07:47,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:47,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:47,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:47,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 12:07:47,477 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:07:47,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:47,477 INFO L85 PathProgramCache]: Analyzing trace with hash -510697682, now seen corresponding path program 10 times [2024-06-14 12:07:47,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:47,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115671793] [2024-06-14 12:07:47,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:47,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:48,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:48,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:48,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115671793] [2024-06-14 12:07:48,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115671793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:48,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:48,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:48,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292372750] [2024-06-14 12:07:48,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:48,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:48,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:48,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:48,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:48,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:07:48,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 432 transitions, 4677 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:48,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:48,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:07:48,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:49,644 INFO L124 PetriNetUnfolderBase]: 3732/5650 cut-off events. [2024-06-14 12:07:49,645 INFO L125 PetriNetUnfolderBase]: For 1121614/1121616 co-relation queries the response was YES. [2024-06-14 12:07:49,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53036 conditions, 5650 events. 3732/5650 cut-off events. For 1121614/1121616 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30516 event pairs, 902 based on Foata normal form. 3/5651 useless extension candidates. Maximal degree in co-relation 52883. Up to 5612 conditions per place. [2024-06-14 12:07:49,726 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 416 selfloop transitions, 23 changer transitions 0/442 dead transitions. [2024-06-14 12:07:49,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 442 transitions, 5579 flow [2024-06-14 12:07:49,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:07:49,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:07:49,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-14 12:07:49,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-14 12:07:49,728 INFO L175 Difference]: Start difference. First operand has 339 places, 432 transitions, 4677 flow. Second operand 8 states and 121 transitions. [2024-06-14 12:07:49,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 442 transitions, 5579 flow [2024-06-14 12:07:53,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 442 transitions, 5451 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-14 12:07:53,873 INFO L231 Difference]: Finished difference. Result has 342 places, 432 transitions, 4601 flow [2024-06-14 12:07:53,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4549, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4601, PETRI_PLACES=342, PETRI_TRANSITIONS=432} [2024-06-14 12:07:53,874 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-14 12:07:53,874 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 432 transitions, 4601 flow [2024-06-14 12:07:53,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:53,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:53,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:53,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 12:07:53,875 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:07:53,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:53,875 INFO L85 PathProgramCache]: Analyzing trace with hash -346746148, now seen corresponding path program 11 times [2024-06-14 12:07:53,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:53,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021601316] [2024-06-14 12:07:53,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:53,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:53,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:54,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:54,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:54,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021601316] [2024-06-14 12:07:54,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021601316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:54,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:54,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:54,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753674375] [2024-06-14 12:07:54,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:54,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:54,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:54,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:54,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:54,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:07:54,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 432 transitions, 4601 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:54,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:54,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:07:54,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:56,202 INFO L124 PetriNetUnfolderBase]: 3726/5642 cut-off events. [2024-06-14 12:07:56,202 INFO L125 PetriNetUnfolderBase]: For 1135924/1135926 co-relation queries the response was YES. [2024-06-14 12:07:56,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52748 conditions, 5642 events. 3726/5642 cut-off events. For 1135924/1135926 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30429 event pairs, 905 based on Foata normal form. 2/5642 useless extension candidates. Maximal degree in co-relation 52594. Up to 5586 conditions per place. [2024-06-14 12:07:56,272 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 410 selfloop transitions, 30 changer transitions 0/443 dead transitions. [2024-06-14 12:07:56,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 443 transitions, 5511 flow [2024-06-14 12:07:56,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:07:56,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:07:56,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 12:07:56,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-14 12:07:56,274 INFO L175 Difference]: Start difference. First operand has 342 places, 432 transitions, 4601 flow. Second operand 8 states and 124 transitions. [2024-06-14 12:07:56,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 443 transitions, 5511 flow [2024-06-14 12:08:00,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 443 transitions, 5417 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 12:08:00,240 INFO L231 Difference]: Finished difference. Result has 344 places, 432 transitions, 4573 flow [2024-06-14 12:08:00,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4507, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4573, PETRI_PLACES=344, PETRI_TRANSITIONS=432} [2024-06-14 12:08:00,240 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-14 12:08:00,240 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 432 transitions, 4573 flow [2024-06-14 12:08:00,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:00,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:00,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:00,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 12:08:00,241 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:00,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:00,241 INFO L85 PathProgramCache]: Analyzing trace with hash -346567402, now seen corresponding path program 9 times [2024-06-14 12:08:00,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:00,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997287259] [2024-06-14 12:08:00,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:00,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:00,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:00,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:00,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:00,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997287259] [2024-06-14 12:08:00,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997287259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:00,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:00,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:08:00,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197609911] [2024-06-14 12:08:00,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:00,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:08:00,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:00,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:08:00,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:08:01,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:08:01,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 432 transitions, 4573 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:01,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:01,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:08:01,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:02,386 INFO L124 PetriNetUnfolderBase]: 3717/5630 cut-off events. [2024-06-14 12:08:02,387 INFO L125 PetriNetUnfolderBase]: For 1145413/1145415 co-relation queries the response was YES. [2024-06-14 12:08:02,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52514 conditions, 5630 events. 3717/5630 cut-off events. For 1145413/1145415 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30390 event pairs, 899 based on Foata normal form. 5/5633 useless extension candidates. Maximal degree in co-relation 52359. Up to 5577 conditions per place. [2024-06-14 12:08:02,470 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 411 selfloop transitions, 30 changer transitions 0/444 dead transitions. [2024-06-14 12:08:02,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 444 transitions, 5489 flow [2024-06-14 12:08:02,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:08:02,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:08:02,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 12:08:02,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-14 12:08:02,471 INFO L175 Difference]: Start difference. First operand has 344 places, 432 transitions, 4573 flow. Second operand 8 states and 125 transitions. [2024-06-14 12:08:02,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 444 transitions, 5489 flow [2024-06-14 12:08:07,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 444 transitions, 5393 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 12:08:07,577 INFO L231 Difference]: Finished difference. Result has 345 places, 432 transitions, 4543 flow [2024-06-14 12:08:07,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4477, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4543, PETRI_PLACES=345, PETRI_TRANSITIONS=432} [2024-06-14 12:08:07,578 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-14 12:08:07,578 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 432 transitions, 4543 flow [2024-06-14 12:08:07,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:07,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:07,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:07,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 12:08:07,579 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:07,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:07,579 INFO L85 PathProgramCache]: Analyzing trace with hash -524114818, now seen corresponding path program 12 times [2024-06-14 12:08:07,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:07,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833366086] [2024-06-14 12:08:07,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:07,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:07,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:08,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:08,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:08,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833366086] [2024-06-14 12:08:08,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833366086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:08,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:08,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:08:08,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003959467] [2024-06-14 12:08:08,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:08,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:08:08,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:08,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:08:08,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:08:08,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:08:08,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 432 transitions, 4543 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:08,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:08,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:08:08,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:09,709 INFO L124 PetriNetUnfolderBase]: 3711/5622 cut-off events. [2024-06-14 12:08:09,709 INFO L125 PetriNetUnfolderBase]: For 1149049/1149051 co-relation queries the response was YES. [2024-06-14 12:08:09,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52384 conditions, 5622 events. 3711/5622 cut-off events. For 1149049/1149051 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30361 event pairs, 902 based on Foata normal form. 2/5622 useless extension candidates. Maximal degree in co-relation 52228. Up to 5524 conditions per place. [2024-06-14 12:08:09,797 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 388 selfloop transitions, 53 changer transitions 0/444 dead transitions. [2024-06-14 12:08:09,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 444 transitions, 5461 flow [2024-06-14 12:08:09,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:08:09,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:08:09,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 12:08:09,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-14 12:08:09,799 INFO L175 Difference]: Start difference. First operand has 345 places, 432 transitions, 4543 flow. Second operand 8 states and 127 transitions. [2024-06-14 12:08:09,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 444 transitions, 5461 flow [2024-06-14 12:08:13,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 444 transitions, 5333 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 12:08:13,961 INFO L231 Difference]: Finished difference. Result has 346 places, 432 transitions, 4527 flow [2024-06-14 12:08:13,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4415, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4527, PETRI_PLACES=346, PETRI_TRANSITIONS=432} [2024-06-14 12:08:13,961 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-14 12:08:13,962 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 432 transitions, 4527 flow [2024-06-14 12:08:13,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:13,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:13,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:13,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 12:08:13,962 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:13,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:13,963 INFO L85 PathProgramCache]: Analyzing trace with hash -510697310, now seen corresponding path program 10 times [2024-06-14 12:08:13,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:13,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828898149] [2024-06-14 12:08:13,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:13,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:14,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:14,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:14,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828898149] [2024-06-14 12:08:14,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828898149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:14,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:14,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:08:14,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106863578] [2024-06-14 12:08:14,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:14,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:08:14,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:14,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:08:14,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:08:14,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:08:14,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 432 transitions, 4527 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:14,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:14,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:08:14,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:16,128 INFO L124 PetriNetUnfolderBase]: 3702/5610 cut-off events. [2024-06-14 12:08:16,129 INFO L125 PetriNetUnfolderBase]: For 1157744/1157746 co-relation queries the response was YES. [2024-06-14 12:08:16,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52138 conditions, 5610 events. 3702/5610 cut-off events. For 1157744/1157746 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30313 event pairs, 900 based on Foata normal form. 5/5613 useless extension candidates. Maximal degree in co-relation 51981. Up to 5536 conditions per place. [2024-06-14 12:08:16,213 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 405 selfloop transitions, 38 changer transitions 0/446 dead transitions. [2024-06-14 12:08:16,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 446 transitions, 5457 flow [2024-06-14 12:08:16,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:08:16,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:08:16,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:08:16,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:08:16,214 INFO L175 Difference]: Start difference. First operand has 346 places, 432 transitions, 4527 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:08:16,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 446 transitions, 5457 flow [2024-06-14 12:08:20,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 446 transitions, 5256 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-14 12:08:20,266 INFO L231 Difference]: Finished difference. Result has 346 places, 432 transitions, 4408 flow [2024-06-14 12:08:20,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4326, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4408, PETRI_PLACES=346, PETRI_TRANSITIONS=432} [2024-06-14 12:08:20,266 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-14 12:08:20,266 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 432 transitions, 4408 flow [2024-06-14 12:08:20,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:20,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:20,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:20,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 12:08:20,267 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:20,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:20,267 INFO L85 PathProgramCache]: Analyzing trace with hash -524115004, now seen corresponding path program 11 times [2024-06-14 12:08:20,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:20,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201259314] [2024-06-14 12:08:20,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:20,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:21,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:21,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:21,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201259314] [2024-06-14 12:08:21,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201259314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:21,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:21,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:08:21,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739429334] [2024-06-14 12:08:21,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:21,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:08:21,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:21,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:08:21,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:08:21,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:08:21,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 432 transitions, 4408 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:21,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:21,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:08:21,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:22,427 INFO L124 PetriNetUnfolderBase]: 3699/5606 cut-off events. [2024-06-14 12:08:22,427 INFO L125 PetriNetUnfolderBase]: For 1160138/1160140 co-relation queries the response was YES. [2024-06-14 12:08:22,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52083 conditions, 5606 events. 3699/5606 cut-off events. For 1160138/1160140 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30265 event pairs, 901 based on Foata normal form. 3/5607 useless extension candidates. Maximal degree in co-relation 51925. Up to 5546 conditions per place. [2024-06-14 12:08:22,504 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 400 selfloop transitions, 40 changer transitions 0/443 dead transitions. [2024-06-14 12:08:22,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 443 transitions, 5530 flow [2024-06-14 12:08:22,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:08:22,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:08:22,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 12:08:22,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-14 12:08:22,506 INFO L175 Difference]: Start difference. First operand has 346 places, 432 transitions, 4408 flow. Second operand 8 states and 125 transitions. [2024-06-14 12:08:22,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 443 transitions, 5530 flow [2024-06-14 12:08:26,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 443 transitions, 5378 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-14 12:08:26,731 INFO L231 Difference]: Finished difference. Result has 347 places, 432 transitions, 4342 flow [2024-06-14 12:08:26,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4256, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4342, PETRI_PLACES=347, PETRI_TRANSITIONS=432} [2024-06-14 12:08:26,732 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-14 12:08:26,732 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 432 transitions, 4342 flow [2024-06-14 12:08:26,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:26,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:26,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:26,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 12:08:26,733 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:26,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:26,733 INFO L85 PathProgramCache]: Analyzing trace with hash -524114632, now seen corresponding path program 11 times [2024-06-14 12:08:26,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:26,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143246567] [2024-06-14 12:08:26,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:26,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:27,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:27,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:27,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143246567] [2024-06-14 12:08:27,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143246567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:27,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:27,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:08:27,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576873876] [2024-06-14 12:08:27,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:27,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:08:27,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:27,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:08:27,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:08:27,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:08:27,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 432 transitions, 4342 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:27,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:27,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:08:27,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:28,785 INFO L124 PetriNetUnfolderBase]: 3714/5627 cut-off events. [2024-06-14 12:08:28,785 INFO L125 PetriNetUnfolderBase]: For 1192141/1192143 co-relation queries the response was YES. [2024-06-14 12:08:28,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52291 conditions, 5627 events. 3714/5627 cut-off events. For 1192141/1192143 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 30385 event pairs, 891 based on Foata normal form. 5/5630 useless extension candidates. Maximal degree in co-relation 52132. Up to 5468 conditions per place. [2024-06-14 12:08:28,872 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 386 selfloop transitions, 63 changer transitions 0/452 dead transitions. [2024-06-14 12:08:28,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 452 transitions, 5566 flow [2024-06-14 12:08:28,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:08:28,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:08:28,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:08:28,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-14 12:08:28,873 INFO L175 Difference]: Start difference. First operand has 347 places, 432 transitions, 4342 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:08:28,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 452 transitions, 5566 flow [2024-06-14 12:08:33,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 452 transitions, 5399 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 12:08:33,213 INFO L231 Difference]: Finished difference. Result has 347 places, 435 transitions, 4359 flow [2024-06-14 12:08:33,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4175, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4359, PETRI_PLACES=347, PETRI_TRANSITIONS=435} [2024-06-14 12:08:33,213 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-14 12:08:33,213 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 435 transitions, 4359 flow [2024-06-14 12:08:33,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:33,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:33,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:33,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 12:08:33,214 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:33,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:33,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1227361606, now seen corresponding path program 12 times [2024-06-14 12:08:33,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:33,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014071031] [2024-06-14 12:08:33,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:33,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:34,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:34,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:34,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014071031] [2024-06-14 12:08:34,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014071031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:34,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:34,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:08:34,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519626783] [2024-06-14 12:08:34,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:34,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:08:34,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:34,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:08:34,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:08:34,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:08:34,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 435 transitions, 4359 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:34,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:34,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:08:34,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:35,452 INFO L124 PetriNetUnfolderBase]: 3711/5622 cut-off events. [2024-06-14 12:08:35,452 INFO L125 PetriNetUnfolderBase]: For 1195231/1195231 co-relation queries the response was YES. [2024-06-14 12:08:35,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52418 conditions, 5622 events. 3711/5622 cut-off events. For 1195231/1195231 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 30361 event pairs, 906 based on Foata normal form. 1/5621 useless extension candidates. Maximal degree in co-relation 52259. Up to 5597 conditions per place. [2024-06-14 12:08:35,540 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 424 selfloop transitions, 18 changer transitions 0/445 dead transitions. [2024-06-14 12:08:35,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 445 transitions, 5267 flow [2024-06-14 12:08:35,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:08:35,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:08:35,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-14 12:08:35,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-14 12:08:35,542 INFO L175 Difference]: Start difference. First operand has 347 places, 435 transitions, 4359 flow. Second operand 8 states and 119 transitions. [2024-06-14 12:08:35,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 445 transitions, 5267 flow [2024-06-14 12:08:38,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 445 transitions, 5005 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-14 12:08:38,810 INFO L231 Difference]: Finished difference. Result has 348 places, 435 transitions, 4139 flow [2024-06-14 12:08:38,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4097, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4139, PETRI_PLACES=348, PETRI_TRANSITIONS=435} [2024-06-14 12:08:38,811 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-14 12:08:38,811 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 435 transitions, 4139 flow [2024-06-14 12:08:38,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:38,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:38,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:38,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 12:08:38,811 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:38,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:38,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1227234754, now seen corresponding path program 12 times [2024-06-14 12:08:38,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:38,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529746632] [2024-06-14 12:08:38,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:38,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:38,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:39,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:39,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:39,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529746632] [2024-06-14 12:08:39,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529746632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:39,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:39,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:08:39,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190895574] [2024-06-14 12:08:39,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:39,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:08:39,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:39,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:08:39,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:08:39,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:08:39,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 435 transitions, 4139 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:39,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:39,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:08:39,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:40,892 INFO L124 PetriNetUnfolderBase]: 3702/5611 cut-off events. [2024-06-14 12:08:40,892 INFO L125 PetriNetUnfolderBase]: For 1208051/1208053 co-relation queries the response was YES. [2024-06-14 12:08:40,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51863 conditions, 5611 events. 3702/5611 cut-off events. For 1208051/1208053 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 30338 event pairs, 905 based on Foata normal form. 5/5614 useless extension candidates. Maximal degree in co-relation 51703. Up to 5457 conditions per place. [2024-06-14 12:08:40,986 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 384 selfloop transitions, 64 changer transitions 0/451 dead transitions. [2024-06-14 12:08:40,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 451 transitions, 5089 flow [2024-06-14 12:08:40,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:08:40,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:08:40,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:08:40,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-14 12:08:40,988 INFO L175 Difference]: Start difference. First operand has 348 places, 435 transitions, 4139 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:08:40,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 451 transitions, 5089 flow [2024-06-14 12:08:43,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 451 transitions, 5031 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 12:08:43,433 INFO L231 Difference]: Finished difference. Result has 349 places, 435 transitions, 4215 flow [2024-06-14 12:08:43,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4081, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4215, PETRI_PLACES=349, PETRI_TRANSITIONS=435} [2024-06-14 12:08:43,434 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-14 12:08:43,434 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 435 transitions, 4215 flow [2024-06-14 12:08:43,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:43,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:43,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:43,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 12:08:43,436 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:43,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:43,436 INFO L85 PathProgramCache]: Analyzing trace with hash -124384140, now seen corresponding path program 5 times [2024-06-14 12:08:43,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:43,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337760886] [2024-06-14 12:08:43,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:43,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:44,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:44,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337760886] [2024-06-14 12:08:44,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337760886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:44,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:44,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:08:44,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678063521] [2024-06-14 12:08:44,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:44,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:08:44,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:44,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:08:44,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:08:44,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:08:44,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 435 transitions, 4215 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:44,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:44,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:08:44,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:45,865 INFO L124 PetriNetUnfolderBase]: 3707/5617 cut-off events. [2024-06-14 12:08:45,866 INFO L125 PetriNetUnfolderBase]: For 1216943/1216943 co-relation queries the response was YES. [2024-06-14 12:08:45,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52267 conditions, 5617 events. 3707/5617 cut-off events. For 1216943/1216943 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30361 event pairs, 903 based on Foata normal form. 1/5616 useless extension candidates. Maximal degree in co-relation 52106. Up to 5589 conditions per place. [2024-06-14 12:08:45,948 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 431 selfloop transitions, 21 changer transitions 0/455 dead transitions. [2024-06-14 12:08:45,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 455 transitions, 5264 flow [2024-06-14 12:08:45,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:08:45,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:08:45,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2024-06-14 12:08:45,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34656084656084657 [2024-06-14 12:08:45,950 INFO L175 Difference]: Start difference. First operand has 349 places, 435 transitions, 4215 flow. Second operand 9 states and 131 transitions. [2024-06-14 12:08:45,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 455 transitions, 5264 flow [2024-06-14 12:08:48,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 455 transitions, 5105 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 12:08:48,973 INFO L231 Difference]: Finished difference. Result has 353 places, 444 transitions, 4247 flow [2024-06-14 12:08:48,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4061, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4247, PETRI_PLACES=353, PETRI_TRANSITIONS=444} [2024-06-14 12:08:48,973 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-14 12:08:48,974 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 444 transitions, 4247 flow [2024-06-14 12:08:48,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:48,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:48,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:48,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 12:08:48,974 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:48,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:48,975 INFO L85 PathProgramCache]: Analyzing trace with hash -524237950, now seen corresponding path program 4 times [2024-06-14 12:08:48,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:48,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637993034] [2024-06-14 12:08:48,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:48,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:48,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:49,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:49,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:49,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637993034] [2024-06-14 12:08:49,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637993034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:49,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:49,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:08:49,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253765240] [2024-06-14 12:08:49,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:49,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:08:49,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:49,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:08:49,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:08:50,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:08:50,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 444 transitions, 4247 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:50,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:50,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:08:50,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:51,388 INFO L124 PetriNetUnfolderBase]: 3702/5610 cut-off events. [2024-06-14 12:08:51,389 INFO L125 PetriNetUnfolderBase]: For 1231842/1231842 co-relation queries the response was YES. [2024-06-14 12:08:51,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52112 conditions, 5610 events. 3702/5610 cut-off events. For 1231842/1231842 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30331 event pairs, 902 based on Foata normal form. 2/5610 useless extension candidates. Maximal degree in co-relation 51949. Up to 5579 conditions per place. [2024-06-14 12:08:51,462 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 433 selfloop transitions, 20 changer transitions 0/456 dead transitions. [2024-06-14 12:08:51,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 456 transitions, 5181 flow [2024-06-14 12:08:51,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:08:51,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:08:51,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2024-06-14 12:08:51,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34656084656084657 [2024-06-14 12:08:51,464 INFO L175 Difference]: Start difference. First operand has 353 places, 444 transitions, 4247 flow. Second operand 9 states and 131 transitions. [2024-06-14 12:08:51,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 456 transitions, 5181 flow [2024-06-14 12:08:55,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 456 transitions, 5086 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-14 12:08:55,096 INFO L231 Difference]: Finished difference. Result has 358 places, 444 transitions, 4197 flow [2024-06-14 12:08:55,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4152, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4197, PETRI_PLACES=358, PETRI_TRANSITIONS=444} [2024-06-14 12:08:55,096 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-14 12:08:55,097 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 444 transitions, 4197 flow [2024-06-14 12:08:55,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:55,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:55,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:55,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 12:08:55,098 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:55,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:55,098 INFO L85 PathProgramCache]: Analyzing trace with hash 323888318, now seen corresponding path program 6 times [2024-06-14 12:08:55,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:55,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607382605] [2024-06-14 12:08:55,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:55,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:55,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:56,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:56,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:56,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607382605] [2024-06-14 12:08:56,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607382605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:56,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:56,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:08:56,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925265635] [2024-06-14 12:08:56,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:56,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:08:56,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:56,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:08:56,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:08:56,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:08:56,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 444 transitions, 4197 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:56,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:56,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:08:56,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:58,212 INFO L124 PetriNetUnfolderBase]: 3758/5688 cut-off events. [2024-06-14 12:08:58,213 INFO L125 PetriNetUnfolderBase]: For 1273220/1273220 co-relation queries the response was YES. [2024-06-14 12:08:58,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53054 conditions, 5688 events. 3758/5688 cut-off events. For 1273220/1273220 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 30717 event pairs, 889 based on Foata normal form. 3/5689 useless extension candidates. Maximal degree in co-relation 52889. Up to 5544 conditions per place. [2024-06-14 12:08:58,284 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 421 selfloop transitions, 60 changer transitions 0/484 dead transitions. [2024-06-14 12:08:58,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 484 transitions, 5685 flow [2024-06-14 12:08:58,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:08:58,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:08:58,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-14 12:08:58,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2024-06-14 12:08:58,285 INFO L175 Difference]: Start difference. First operand has 358 places, 444 transitions, 4197 flow. Second operand 10 states and 159 transitions. [2024-06-14 12:08:58,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 484 transitions, 5685 flow [2024-06-14 12:09:01,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 484 transitions, 5626 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 12:09:01,925 INFO L231 Difference]: Finished difference. Result has 364 places, 463 transitions, 4575 flow [2024-06-14 12:09:01,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4138, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4575, PETRI_PLACES=364, PETRI_TRANSITIONS=463} [2024-06-14 12:09:01,926 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-14 12:09:01,926 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 463 transitions, 4575 flow [2024-06-14 12:09:01,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:01,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:01,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:01,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 12:09:01,927 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:09:01,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:01,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1227008082, now seen corresponding path program 7 times [2024-06-14 12:09:01,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:01,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030665906] [2024-06-14 12:09:01,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:01,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:02,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:02,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:02,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030665906] [2024-06-14 12:09:02,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030665906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:02,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:02,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:09:02,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599608948] [2024-06-14 12:09:02,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:02,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:09:02,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:02,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:09:02,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:09:03,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:09:03,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 463 transitions, 4575 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:03,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:03,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:09:03,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:04,385 INFO L124 PetriNetUnfolderBase]: 3755/5684 cut-off events. [2024-06-14 12:09:04,386 INFO L125 PetriNetUnfolderBase]: For 1278931/1278931 co-relation queries the response was YES. [2024-06-14 12:09:04,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54026 conditions, 5684 events. 3755/5684 cut-off events. For 1278931/1278931 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 30717 event pairs, 903 based on Foata normal form. 1/5683 useless extension candidates. Maximal degree in co-relation 53856. Up to 5641 conditions per place. [2024-06-14 12:09:04,478 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 449 selfloop transitions, 32 changer transitions 0/484 dead transitions. [2024-06-14 12:09:04,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 484 transitions, 5714 flow [2024-06-14 12:09:04,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:09:04,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:09:04,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-14 12:09:04,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-14 12:09:04,480 INFO L175 Difference]: Start difference. First operand has 364 places, 463 transitions, 4575 flow. Second operand 9 states and 135 transitions. [2024-06-14 12:09:04,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 484 transitions, 5714 flow [2024-06-14 12:09:08,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 484 transitions, 5609 flow, removed 49 selfloop flow, removed 2 redundant places. [2024-06-14 12:09:08,761 INFO L231 Difference]: Finished difference. Result has 373 places, 473 transitions, 4720 flow [2024-06-14 12:09:08,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4472, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4720, PETRI_PLACES=373, PETRI_TRANSITIONS=473} [2024-06-14 12:09:08,762 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-14 12:09:08,762 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 473 transitions, 4720 flow [2024-06-14 12:09:08,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:08,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:08,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:08,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 12:09:08,763 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:09:08,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:08,763 INFO L85 PathProgramCache]: Analyzing trace with hash -628332448, now seen corresponding path program 1 times [2024-06-14 12:09:08,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:08,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242716686] [2024-06-14 12:09:08,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:08,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:09,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:09,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:09,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242716686] [2024-06-14 12:09:09,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242716686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:09,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:09,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:09:09,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053760512] [2024-06-14 12:09:09,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:09,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:09:09,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:09,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:09:09,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:09:09,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:09:09,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 473 transitions, 4720 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:09,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:09,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:09:09,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:11,324 INFO L124 PetriNetUnfolderBase]: 3776/5715 cut-off events. [2024-06-14 12:09:11,325 INFO L125 PetriNetUnfolderBase]: For 1321019/1321019 co-relation queries the response was YES. [2024-06-14 12:09:11,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54781 conditions, 5715 events. 3776/5715 cut-off events. For 1321019/1321019 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 30870 event pairs, 860 based on Foata normal form. 2/5715 useless extension candidates. Maximal degree in co-relation 54607. Up to 5632 conditions per place. [2024-06-14 12:09:11,413 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 472 selfloop transitions, 25 changer transitions 0/500 dead transitions. [2024-06-14 12:09:11,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 500 transitions, 6102 flow [2024-06-14 12:09:11,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:09:11,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:09:11,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 12:09:11,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:09:11,414 INFO L175 Difference]: Start difference. First operand has 373 places, 473 transitions, 4720 flow. Second operand 9 states and 144 transitions. [2024-06-14 12:09:11,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 500 transitions, 6102 flow [2024-06-14 12:09:16,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 500 transitions, 6007 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-14 12:09:16,493 INFO L231 Difference]: Finished difference. Result has 378 places, 477 transitions, 4784 flow [2024-06-14 12:09:16,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4625, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4784, PETRI_PLACES=378, PETRI_TRANSITIONS=477} [2024-06-14 12:09:16,493 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-14 12:09:16,493 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 477 transitions, 4784 flow [2024-06-14 12:09:16,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:16,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:16,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:16,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 12:09:16,494 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:09:16,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:16,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1958602178, now seen corresponding path program 2 times [2024-06-14 12:09:16,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:16,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506754936] [2024-06-14 12:09:16,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:16,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:17,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:17,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:17,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506754936] [2024-06-14 12:09:17,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506754936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:17,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:17,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:09:17,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991153114] [2024-06-14 12:09:17,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:17,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:09:17,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:17,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:09:17,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:09:17,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:09:17,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 477 transitions, 4784 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:17,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:17,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:09:17,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:19,161 INFO L124 PetriNetUnfolderBase]: 3771/5708 cut-off events. [2024-06-14 12:09:19,161 INFO L125 PetriNetUnfolderBase]: For 1330016/1330016 co-relation queries the response was YES. [2024-06-14 12:09:19,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54813 conditions, 5708 events. 3771/5708 cut-off events. For 1330016/1330016 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 30902 event pairs, 901 based on Foata normal form. 2/5708 useless extension candidates. Maximal degree in co-relation 54637. Up to 5654 conditions per place. [2024-06-14 12:09:19,253 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 470 selfloop transitions, 21 changer transitions 0/494 dead transitions. [2024-06-14 12:09:19,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 494 transitions, 5808 flow [2024-06-14 12:09:19,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:09:19,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:09:19,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 12:09:19,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-14 12:09:19,254 INFO L175 Difference]: Start difference. First operand has 378 places, 477 transitions, 4784 flow. Second operand 8 states and 127 transitions. [2024-06-14 12:09:19,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 494 transitions, 5808 flow [2024-06-14 12:09:24,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 494 transitions, 5694 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-14 12:09:24,153 INFO L231 Difference]: Finished difference. Result has 381 places, 477 transitions, 4717 flow [2024-06-14 12:09:24,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4670, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4717, PETRI_PLACES=381, PETRI_TRANSITIONS=477} [2024-06-14 12:09:24,154 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-14 12:09:24,154 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 477 transitions, 4717 flow [2024-06-14 12:09:24,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:24,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:24,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:24,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 12:09:24,154 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:09:24,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:24,155 INFO L85 PathProgramCache]: Analyzing trace with hash -510184318, now seen corresponding path program 3 times [2024-06-14 12:09:24,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:24,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709127551] [2024-06-14 12:09:24,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:24,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:24,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:25,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:25,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:25,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709127551] [2024-06-14 12:09:25,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709127551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:25,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:25,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:09:25,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046028267] [2024-06-14 12:09:25,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:25,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:09:25,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:25,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:09:25,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:09:25,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:09:25,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 477 transitions, 4717 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:25,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:25,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:09:25,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:27,029 INFO L124 PetriNetUnfolderBase]: 3779/5720 cut-off events. [2024-06-14 12:09:27,030 INFO L125 PetriNetUnfolderBase]: For 1352411/1352411 co-relation queries the response was YES. [2024-06-14 12:09:27,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55003 conditions, 5720 events. 3779/5720 cut-off events. For 1352411/1352411 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 30964 event pairs, 902 based on Foata normal form. 2/5720 useless extension candidates. Maximal degree in co-relation 54825. Up to 5645 conditions per place. [2024-06-14 12:09:27,138 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 453 selfloop transitions, 37 changer transitions 0/493 dead transitions. [2024-06-14 12:09:27,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 493 transitions, 5785 flow [2024-06-14 12:09:27,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:09:27,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:09:27,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 12:09:27,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-14 12:09:27,140 INFO L175 Difference]: Start difference. First operand has 381 places, 477 transitions, 4717 flow. Second operand 8 states and 129 transitions. [2024-06-14 12:09:27,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 493 transitions, 5785 flow [2024-06-14 12:09:33,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 493 transitions, 5738 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 12:09:33,879 INFO L231 Difference]: Finished difference. Result has 382 places, 479 transitions, 4807 flow [2024-06-14 12:09:33,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4670, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4807, PETRI_PLACES=382, PETRI_TRANSITIONS=479} [2024-06-14 12:09:33,881 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-14 12:09:33,881 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 479 transitions, 4807 flow [2024-06-14 12:09:33,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:33,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:33,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:33,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 12:09:33,882 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:09:33,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:33,882 INFO L85 PathProgramCache]: Analyzing trace with hash -520968498, now seen corresponding path program 4 times [2024-06-14 12:09:33,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:33,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995883044] [2024-06-14 12:09:33,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:33,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:34,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:34,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:34,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995883044] [2024-06-14 12:09:34,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995883044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:34,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:34,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:09:34,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94292872] [2024-06-14 12:09:34,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:34,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:09:34,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:34,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:09:34,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:09:35,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:09:35,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 479 transitions, 4807 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:35,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:35,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:09:35,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:36,599 INFO L124 PetriNetUnfolderBase]: 3774/5714 cut-off events. [2024-06-14 12:09:36,599 INFO L125 PetriNetUnfolderBase]: For 1359010/1359012 co-relation queries the response was YES. [2024-06-14 12:09:36,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55039 conditions, 5714 events. 3774/5714 cut-off events. For 1359010/1359012 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 30954 event pairs, 912 based on Foata normal form. 2/5714 useless extension candidates. Maximal degree in co-relation 54860. Up to 5638 conditions per place. [2024-06-14 12:09:36,689 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 452 selfloop transitions, 37 changer transitions 0/492 dead transitions. [2024-06-14 12:09:36,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 492 transitions, 5869 flow [2024-06-14 12:09:36,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:09:36,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:09:36,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 12:09:36,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 12:09:36,690 INFO L175 Difference]: Start difference. First operand has 382 places, 479 transitions, 4807 flow. Second operand 8 states and 126 transitions. [2024-06-14 12:09:36,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 492 transitions, 5869 flow [2024-06-14 12:09:42,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 492 transitions, 5748 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 12:09:42,728 INFO L231 Difference]: Finished difference. Result has 384 places, 481 transitions, 4827 flow [2024-06-14 12:09:42,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4686, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4827, PETRI_PLACES=384, PETRI_TRANSITIONS=481} [2024-06-14 12:09:42,728 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-14 12:09:42,729 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 481 transitions, 4827 flow [2024-06-14 12:09:42,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:42,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:42,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:42,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 12:09:42,729 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:09:42,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:42,730 INFO L85 PathProgramCache]: Analyzing trace with hash -232556223, now seen corresponding path program 1 times [2024-06-14 12:09:42,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:42,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677452168] [2024-06-14 12:09:42,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:42,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:43,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:43,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:43,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677452168] [2024-06-14 12:09:43,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677452168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:43,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:43,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:09:43,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964721057] [2024-06-14 12:09:43,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:43,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:09:43,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:43,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:09:43,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:09:43,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:09:43,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 481 transitions, 4827 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:43,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:43,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:09:43,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:45,408 INFO L124 PetriNetUnfolderBase]: 3787/5731 cut-off events. [2024-06-14 12:09:45,409 INFO L125 PetriNetUnfolderBase]: For 1379495/1379495 co-relation queries the response was YES. [2024-06-14 12:09:45,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55540 conditions, 5731 events. 3787/5731 cut-off events. For 1379495/1379495 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 30997 event pairs, 872 based on Foata normal form. 1/5730 useless extension candidates. Maximal degree in co-relation 55360. Up to 5584 conditions per place. [2024-06-14 12:09:45,507 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 463 selfloop transitions, 63 changer transitions 0/529 dead transitions. [2024-06-14 12:09:45,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 529 transitions, 6373 flow [2024-06-14 12:09:45,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:09:45,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:09:45,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-14 12:09:45,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-14 12:09:45,509 INFO L175 Difference]: Start difference. First operand has 384 places, 481 transitions, 4827 flow. Second operand 11 states and 186 transitions. [2024-06-14 12:09:45,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 529 transitions, 6373 flow [2024-06-14 12:09:52,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 529 transitions, 6248 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 12:09:52,036 INFO L231 Difference]: Finished difference. Result has 390 places, 491 transitions, 5017 flow [2024-06-14 12:09:52,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4702, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5017, PETRI_PLACES=390, PETRI_TRANSITIONS=491} [2024-06-14 12:09:52,036 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-14 12:09:52,036 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 491 transitions, 5017 flow [2024-06-14 12:09:52,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:52,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:52,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:52,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 12:09:52,037 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:09:52,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:52,038 INFO L85 PathProgramCache]: Analyzing trace with hash -226842303, now seen corresponding path program 2 times [2024-06-14 12:09:52,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:52,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327279275] [2024-06-14 12:09:52,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:52,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:52,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:53,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:53,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:53,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327279275] [2024-06-14 12:09:53,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327279275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:53,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:53,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:09:53,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520475] [2024-06-14 12:09:53,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:53,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:09:53,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:53,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:09:53,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:09:53,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:09:53,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 491 transitions, 5017 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:53,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:53,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:09:53,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:54,622 INFO L124 PetriNetUnfolderBase]: 3792/5738 cut-off events. [2024-06-14 12:09:54,623 INFO L125 PetriNetUnfolderBase]: For 1404499/1404499 co-relation queries the response was YES. [2024-06-14 12:09:54,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56296 conditions, 5738 events. 3792/5738 cut-off events. For 1404499/1404499 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 31086 event pairs, 867 based on Foata normal form. 1/5737 useless extension candidates. Maximal degree in co-relation 56114. Up to 5590 conditions per place. [2024-06-14 12:09:54,718 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 463 selfloop transitions, 65 changer transitions 0/531 dead transitions. [2024-06-14 12:09:54,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 531 transitions, 6484 flow [2024-06-14 12:09:54,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 12:09:54,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 12:09:54,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 208 transitions. [2024-06-14 12:09:54,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:09:54,720 INFO L175 Difference]: Start difference. First operand has 390 places, 491 transitions, 5017 flow. Second operand 13 states and 208 transitions. [2024-06-14 12:09:54,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 531 transitions, 6484 flow [2024-06-14 12:09:58,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 531 transitions, 6287 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-14 12:09:58,445 INFO L231 Difference]: Finished difference. Result has 396 places, 494 transitions, 5028 flow [2024-06-14 12:09:58,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4856, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5028, PETRI_PLACES=396, PETRI_TRANSITIONS=494} [2024-06-14 12:09:58,445 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-14 12:09:58,445 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 494 transitions, 5028 flow [2024-06-14 12:09:58,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:58,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:58,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:58,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 12:09:58,446 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:09:58,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:58,447 INFO L85 PathProgramCache]: Analyzing trace with hash 666746064, now seen corresponding path program 1 times [2024-06-14 12:09:58,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:58,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702941920] [2024-06-14 12:09:58,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:58,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:58,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:59,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:59,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:59,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702941920] [2024-06-14 12:09:59,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702941920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:59,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:59,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:09:59,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293986987] [2024-06-14 12:09:59,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:59,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:09:59,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:59,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:09:59,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:09:59,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:09:59,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 494 transitions, 5028 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:59,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:59,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:09:59,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:01,035 INFO L124 PetriNetUnfolderBase]: 3802/5752 cut-off events. [2024-06-14 12:10:01,036 INFO L125 PetriNetUnfolderBase]: For 1434867/1434867 co-relation queries the response was YES. [2024-06-14 12:10:01,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56588 conditions, 5752 events. 3802/5752 cut-off events. For 1434867/1434867 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 31181 event pairs, 869 based on Foata normal form. 2/5752 useless extension candidates. Maximal degree in co-relation 56404. Up to 5674 conditions per place. [2024-06-14 12:10:01,155 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 504 selfloop transitions, 21 changer transitions 0/528 dead transitions. [2024-06-14 12:10:01,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 528 transitions, 6260 flow [2024-06-14 12:10:01,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:10:01,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:10:01,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 12:10:01,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-14 12:10:01,157 INFO L175 Difference]: Start difference. First operand has 396 places, 494 transitions, 5028 flow. Second operand 9 states and 151 transitions. [2024-06-14 12:10:01,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 528 transitions, 6260 flow [2024-06-14 12:10:06,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 528 transitions, 6134 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-14 12:10:06,776 INFO L231 Difference]: Finished difference. Result has 395 places, 497 transitions, 5048 flow [2024-06-14 12:10:06,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4902, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5048, PETRI_PLACES=395, PETRI_TRANSITIONS=497} [2024-06-14 12:10:06,777 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-14 12:10:06,777 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 497 transitions, 5048 flow [2024-06-14 12:10:06,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:06,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:06,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:06,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 12:10:06,778 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:10:06,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:06,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1561079566, now seen corresponding path program 2 times [2024-06-14 12:10:06,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:06,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791292911] [2024-06-14 12:10:06,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:06,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:06,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:07,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:07,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:07,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791292911] [2024-06-14 12:10:07,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791292911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:07,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:07,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:10:07,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622675531] [2024-06-14 12:10:07,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:07,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:10:07,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:07,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:10:07,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:10:07,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:10:07,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 497 transitions, 5048 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:07,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:07,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:10:07,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:09,238 INFO L124 PetriNetUnfolderBase]: 3828/5788 cut-off events. [2024-06-14 12:10:09,238 INFO L125 PetriNetUnfolderBase]: For 1476318/1476318 co-relation queries the response was YES. [2024-06-14 12:10:09,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57711 conditions, 5788 events. 3828/5788 cut-off events. For 1476318/1476318 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 31395 event pairs, 873 based on Foata normal form. 2/5788 useless extension candidates. Maximal degree in co-relation 57526. Up to 5661 conditions per place. [2024-06-14 12:10:09,332 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 480 selfloop transitions, 50 changer transitions 0/533 dead transitions. [2024-06-14 12:10:09,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 533 transitions, 6640 flow [2024-06-14 12:10:09,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:10:09,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:10:09,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 12:10:09,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-14 12:10:09,334 INFO L175 Difference]: Start difference. First operand has 395 places, 497 transitions, 5048 flow. Second operand 9 states and 156 transitions. [2024-06-14 12:10:09,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 533 transitions, 6640 flow [2024-06-14 12:10:13,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 533 transitions, 6506 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-14 12:10:13,959 INFO L231 Difference]: Finished difference. Result has 397 places, 503 transitions, 5222 flow [2024-06-14 12:10:13,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4914, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5222, PETRI_PLACES=397, PETRI_TRANSITIONS=503} [2024-06-14 12:10:13,959 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-14 12:10:13,960 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 503 transitions, 5222 flow [2024-06-14 12:10:13,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:13,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:13,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:13,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 12:10:13,960 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:10:13,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:13,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1561079380, now seen corresponding path program 1 times [2024-06-14 12:10:13,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:13,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575633272] [2024-06-14 12:10:13,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:13,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:13,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:14,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:14,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:14,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575633272] [2024-06-14 12:10:14,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575633272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:14,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:14,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:10:14,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230620017] [2024-06-14 12:10:14,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:14,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:10:14,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:14,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:10:14,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:10:14,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:10:14,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 503 transitions, 5222 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:14,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:14,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:10:14,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:16,477 INFO L124 PetriNetUnfolderBase]: 3867/5842 cut-off events. [2024-06-14 12:10:16,477 INFO L125 PetriNetUnfolderBase]: For 1537046/1537046 co-relation queries the response was YES. [2024-06-14 12:10:16,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59022 conditions, 5842 events. 3867/5842 cut-off events. For 1537046/1537046 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 31689 event pairs, 847 based on Foata normal form. 3/5843 useless extension candidates. Maximal degree in co-relation 58836. Up to 5601 conditions per place. [2024-06-14 12:10:16,585 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 463 selfloop transitions, 79 changer transitions 0/545 dead transitions. [2024-06-14 12:10:16,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 545 transitions, 6827 flow [2024-06-14 12:10:16,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:10:16,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:10:16,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 12:10:16,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-14 12:10:16,587 INFO L175 Difference]: Start difference. First operand has 397 places, 503 transitions, 5222 flow. Second operand 9 states and 163 transitions. [2024-06-14 12:10:16,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 545 transitions, 6827 flow [2024-06-14 12:10:21,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 545 transitions, 6661 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-14 12:10:21,602 INFO L231 Difference]: Finished difference. Result has 401 places, 509 transitions, 5358 flow [2024-06-14 12:10:21,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5056, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5358, PETRI_PLACES=401, PETRI_TRANSITIONS=509} [2024-06-14 12:10:21,603 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-14 12:10:21,604 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 509 transitions, 5358 flow [2024-06-14 12:10:21,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:21,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:21,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:21,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 12:10:21,604 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:10:21,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:21,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1383948046, now seen corresponding path program 3 times [2024-06-14 12:10:21,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:21,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216979792] [2024-06-14 12:10:21,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:21,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:22,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:22,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216979792] [2024-06-14 12:10:22,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216979792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:22,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:22,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:10:22,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949227933] [2024-06-14 12:10:22,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:22,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:10:22,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:22,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:10:22,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:10:22,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:10:22,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 509 transitions, 5358 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:22,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:22,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:10:22,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:24,229 INFO L124 PetriNetUnfolderBase]: 3877/5856 cut-off events. [2024-06-14 12:10:24,229 INFO L125 PetriNetUnfolderBase]: For 1554211/1554211 co-relation queries the response was YES. [2024-06-14 12:10:24,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59682 conditions, 5856 events. 3877/5856 cut-off events. For 1554211/1554211 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 31839 event pairs, 874 based on Foata normal form. 2/5856 useless extension candidates. Maximal degree in co-relation 59494. Up to 5725 conditions per place. [2024-06-14 12:10:24,330 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 487 selfloop transitions, 54 changer transitions 0/544 dead transitions. [2024-06-14 12:10:24,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 544 transitions, 6856 flow [2024-06-14 12:10:24,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:10:24,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:10:24,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-14 12:10:24,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-14 12:10:24,332 INFO L175 Difference]: Start difference. First operand has 401 places, 509 transitions, 5358 flow. Second operand 11 states and 180 transitions. [2024-06-14 12:10:24,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 544 transitions, 6856 flow [2024-06-14 12:10:29,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 544 transitions, 6688 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-14 12:10:29,096 INFO L231 Difference]: Finished difference. Result has 407 places, 512 transitions, 5376 flow [2024-06-14 12:10:29,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5190, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5376, PETRI_PLACES=407, PETRI_TRANSITIONS=512} [2024-06-14 12:10:29,096 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 364 predicate places. [2024-06-14 12:10:29,097 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 512 transitions, 5376 flow [2024-06-14 12:10:29,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:29,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:29,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:29,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 12:10:29,097 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:10:29,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:29,098 INFO L85 PathProgramCache]: Analyzing trace with hash 31773368, now seen corresponding path program 2 times [2024-06-14 12:10:29,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:29,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165349246] [2024-06-14 12:10:29,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:29,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:29,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:29,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:29,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165349246] [2024-06-14 12:10:29,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165349246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:29,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:29,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:10:29,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397402980] [2024-06-14 12:10:29,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:29,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:10:29,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:29,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:10:29,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:10:30,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:10:30,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 512 transitions, 5376 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:30,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:30,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:10:30,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:31,588 INFO L124 PetriNetUnfolderBase]: 3916/5910 cut-off events. [2024-06-14 12:10:31,588 INFO L125 PetriNetUnfolderBase]: For 1609500/1609500 co-relation queries the response was YES. [2024-06-14 12:10:31,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60509 conditions, 5910 events. 3916/5910 cut-off events. For 1609500/1609500 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 32091 event pairs, 852 based on Foata normal form. 3/5911 useless extension candidates. Maximal degree in co-relation 60319. Up to 5650 conditions per place. [2024-06-14 12:10:31,690 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 471 selfloop transitions, 88 changer transitions 0/562 dead transitions. [2024-06-14 12:10:31,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 562 transitions, 7263 flow [2024-06-14 12:10:31,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 12:10:31,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 12:10:31,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 204 transitions. [2024-06-14 12:10:31,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 12:10:31,692 INFO L175 Difference]: Start difference. First operand has 407 places, 512 transitions, 5376 flow. Second operand 12 states and 204 transitions. [2024-06-14 12:10:31,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 562 transitions, 7263 flow [2024-06-14 12:10:37,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 562 transitions, 7093 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-14 12:10:37,540 INFO L231 Difference]: Finished difference. Result has 410 places, 518 transitions, 5472 flow [2024-06-14 12:10:37,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5206, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5472, PETRI_PLACES=410, PETRI_TRANSITIONS=518} [2024-06-14 12:10:37,541 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-14 12:10:37,541 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 518 transitions, 5472 flow [2024-06-14 12:10:37,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:37,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:37,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:37,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 12:10:37,542 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:10:37,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:37,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1383947860, now seen corresponding path program 3 times [2024-06-14 12:10:37,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:37,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647076484] [2024-06-14 12:10:37,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:37,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:38,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:38,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:38,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647076484] [2024-06-14 12:10:38,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647076484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:38,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:38,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:10:38,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397202603] [2024-06-14 12:10:38,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:38,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:10:38,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:38,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:10:38,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:10:38,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:10:38,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 518 transitions, 5472 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:38,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:38,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:10:38,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:40,160 INFO L124 PetriNetUnfolderBase]: 3907/5898 cut-off events. [2024-06-14 12:10:40,160 INFO L125 PetriNetUnfolderBase]: For 1610498/1610498 co-relation queries the response was YES. [2024-06-14 12:10:40,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60294 conditions, 5898 events. 3907/5898 cut-off events. For 1610498/1610498 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 31994 event pairs, 848 based on Foata normal form. 3/5899 useless extension candidates. Maximal degree in co-relation 60103. Up to 5643 conditions per place. [2024-06-14 12:10:40,261 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 473 selfloop transitions, 86 changer transitions 0/562 dead transitions. [2024-06-14 12:10:40,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 562 transitions, 7037 flow [2024-06-14 12:10:40,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:10:40,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:10:40,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 196 transitions. [2024-06-14 12:10:40,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-14 12:10:40,262 INFO L175 Difference]: Start difference. First operand has 410 places, 518 transitions, 5472 flow. Second operand 11 states and 196 transitions. [2024-06-14 12:10:40,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 562 transitions, 7037 flow [2024-06-14 12:10:45,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 562 transitions, 6834 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-14 12:10:45,562 INFO L231 Difference]: Finished difference. Result has 413 places, 518 transitions, 5447 flow [2024-06-14 12:10:45,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5269, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5447, PETRI_PLACES=413, PETRI_TRANSITIONS=518} [2024-06-14 12:10:45,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-14 12:10:45,562 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 518 transitions, 5447 flow [2024-06-14 12:10:45,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:45,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:45,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:45,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 12:10:45,563 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:10:45,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:45,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1649737396, now seen corresponding path program 1 times [2024-06-14 12:10:45,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:45,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102960179] [2024-06-14 12:10:45,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:45,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:45,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:46,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:46,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:46,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102960179] [2024-06-14 12:10:46,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102960179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:46,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:46,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:10:46,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855835785] [2024-06-14 12:10:46,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:46,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:10:46,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:46,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:10:46,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:10:46,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:10:46,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 518 transitions, 5447 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:46,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:46,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:10:46,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:48,417 INFO L124 PetriNetUnfolderBase]: 3987/6018 cut-off events. [2024-06-14 12:10:48,418 INFO L125 PetriNetUnfolderBase]: For 1726159/1726159 co-relation queries the response was YES. [2024-06-14 12:10:48,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62954 conditions, 6018 events. 3987/6018 cut-off events. For 1726159/1726159 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 32660 event pairs, 732 based on Foata normal form. 2/6018 useless extension candidates. Maximal degree in co-relation 62762. Up to 5549 conditions per place. [2024-06-14 12:10:48,520 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 460 selfloop transitions, 108 changer transitions 0/571 dead transitions. [2024-06-14 12:10:48,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 571 transitions, 7400 flow [2024-06-14 12:10:48,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:10:48,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:10:48,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-14 12:10:48,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2024-06-14 12:10:48,522 INFO L175 Difference]: Start difference. First operand has 413 places, 518 transitions, 5447 flow. Second operand 10 states and 187 transitions. [2024-06-14 12:10:48,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 571 transitions, 7400 flow [2024-06-14 12:10:55,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 571 transitions, 7193 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-14 12:10:55,776 INFO L231 Difference]: Finished difference. Result has 413 places, 522 transitions, 5581 flow [2024-06-14 12:10:55,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5240, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5581, PETRI_PLACES=413, PETRI_TRANSITIONS=522} [2024-06-14 12:10:55,776 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-14 12:10:55,777 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 522 transitions, 5581 flow [2024-06-14 12:10:55,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:55,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:55,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:55,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 12:10:55,777 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:10:55,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:55,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1642328086, now seen corresponding path program 2 times [2024-06-14 12:10:55,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:55,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982831553] [2024-06-14 12:10:55,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:55,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:55,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:56,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:56,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:56,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982831553] [2024-06-14 12:10:56,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982831553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:56,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:56,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:10:56,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081075372] [2024-06-14 12:10:56,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:56,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:10:56,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:56,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:10:56,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:10:57,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:10:57,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 522 transitions, 5581 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:57,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:57,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:10:57,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:58,769 INFO L124 PetriNetUnfolderBase]: 4080/6157 cut-off events. [2024-06-14 12:10:58,769 INFO L125 PetriNetUnfolderBase]: For 1871768/1871768 co-relation queries the response was YES. [2024-06-14 12:10:58,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66742 conditions, 6157 events. 4080/6157 cut-off events. For 1871768/1871768 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 33701 event pairs, 887 based on Foata normal form. 2/6157 useless extension candidates. Maximal degree in co-relation 66548. Up to 5799 conditions per place. [2024-06-14 12:10:58,877 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 467 selfloop transitions, 105 changer transitions 0/575 dead transitions. [2024-06-14 12:10:58,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 575 transitions, 7582 flow [2024-06-14 12:10:58,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:10:58,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:10:58,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-14 12:10:58,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-14 12:10:58,878 INFO L175 Difference]: Start difference. First operand has 413 places, 522 transitions, 5581 flow. Second operand 11 states and 201 transitions. [2024-06-14 12:10:58,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 575 transitions, 7582 flow [2024-06-14 12:11:06,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 575 transitions, 7394 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 12:11:06,089 INFO L231 Difference]: Finished difference. Result has 418 places, 526 transitions, 5708 flow [2024-06-14 12:11:06,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5409, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5708, PETRI_PLACES=418, PETRI_TRANSITIONS=526} [2024-06-14 12:11:06,090 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-14 12:11:06,090 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 526 transitions, 5708 flow [2024-06-14 12:11:06,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:06,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:06,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:06,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 12:11:06,091 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:11:06,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:06,091 INFO L85 PathProgramCache]: Analyzing trace with hash -226834367, now seen corresponding path program 1 times [2024-06-14 12:11:06,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:06,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940676973] [2024-06-14 12:11:06,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:06,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:06,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:07,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:07,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940676973] [2024-06-14 12:11:07,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940676973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:07,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:07,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:11:07,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471367036] [2024-06-14 12:11:07,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:07,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:11:07,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:07,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:11:07,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:11:07,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:11:07,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 526 transitions, 5708 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:07,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:07,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:11:07,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:09,454 INFO L124 PetriNetUnfolderBase]: 4098/6182 cut-off events. [2024-06-14 12:11:09,454 INFO L125 PetriNetUnfolderBase]: For 1909997/1909997 co-relation queries the response was YES. [2024-06-14 12:11:09,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67565 conditions, 6182 events. 4098/6182 cut-off events. For 1909997/1909997 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 33810 event pairs, 886 based on Foata normal form. 2/6182 useless extension candidates. Maximal degree in co-relation 67369. Up to 5902 conditions per place. [2024-06-14 12:11:09,563 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 471 selfloop transitions, 104 changer transitions 0/578 dead transitions. [2024-06-14 12:11:09,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 578 transitions, 7458 flow [2024-06-14 12:11:09,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 12:11:09,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 12:11:09,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 216 transitions. [2024-06-14 12:11:09,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956043956043956 [2024-06-14 12:11:09,564 INFO L175 Difference]: Start difference. First operand has 418 places, 526 transitions, 5708 flow. Second operand 13 states and 216 transitions. [2024-06-14 12:11:09,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 578 transitions, 7458 flow [2024-06-14 12:11:18,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 578 transitions, 7340 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 12:11:18,748 INFO L231 Difference]: Finished difference. Result has 426 places, 535 transitions, 6005 flow [2024-06-14 12:11:18,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5593, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6005, PETRI_PLACES=426, PETRI_TRANSITIONS=535} [2024-06-14 12:11:18,749 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-14 12:11:18,749 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 535 transitions, 6005 flow [2024-06-14 12:11:18,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:18,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:18,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:18,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 12:11:18,750 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:11:18,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:18,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1642318786, now seen corresponding path program 3 times [2024-06-14 12:11:18,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:18,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369925340] [2024-06-14 12:11:18,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:18,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:19,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:19,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:19,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369925340] [2024-06-14 12:11:19,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369925340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:19,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:19,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:11:19,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453788624] [2024-06-14 12:11:19,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:19,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:11:19,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:19,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:11:19,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:11:20,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:11:20,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 535 transitions, 6005 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:20,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:20,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:11:20,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:21,792 INFO L124 PetriNetUnfolderBase]: 4065/6135 cut-off events. [2024-06-14 12:11:21,793 INFO L125 PetriNetUnfolderBase]: For 1923408/1923408 co-relation queries the response was YES. [2024-06-14 12:11:21,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66308 conditions, 6135 events. 4065/6135 cut-off events. For 1923408/1923408 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 33551 event pairs, 877 based on Foata normal form. 14/6147 useless extension candidates. Maximal degree in co-relation 66109. Up to 5822 conditions per place. [2024-06-14 12:11:21,906 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 474 selfloop transitions, 105 changer transitions 0/582 dead transitions. [2024-06-14 12:11:21,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 582 transitions, 7660 flow [2024-06-14 12:11:21,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 12:11:21,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 12:11:21,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 209 transitions. [2024-06-14 12:11:21,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146825396825397 [2024-06-14 12:11:21,908 INFO L175 Difference]: Start difference. First operand has 426 places, 535 transitions, 6005 flow. Second operand 12 states and 209 transitions. [2024-06-14 12:11:21,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 582 transitions, 7660 flow [2024-06-14 12:11:28,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 582 transitions, 7462 flow, removed 53 selfloop flow, removed 8 redundant places. [2024-06-14 12:11:28,913 INFO L231 Difference]: Finished difference. Result has 430 places, 535 transitions, 6024 flow [2024-06-14 12:11:28,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5807, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6024, PETRI_PLACES=430, PETRI_TRANSITIONS=535} [2024-06-14 12:11:28,913 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-14 12:11:28,913 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 535 transitions, 6024 flow [2024-06-14 12:11:28,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:28,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:28,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:28,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 12:11:28,914 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:11:28,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:28,914 INFO L85 PathProgramCache]: Analyzing trace with hash -412411128, now seen corresponding path program 4 times [2024-06-14 12:11:28,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:28,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957808617] [2024-06-14 12:11:28,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:28,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:29,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:29,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:29,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957808617] [2024-06-14 12:11:29,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957808617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:29,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:29,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:29,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858178898] [2024-06-14 12:11:29,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:29,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:29,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:29,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:29,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:29,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:11:29,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 535 transitions, 6024 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:29,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:29,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:11:29,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:31,671 INFO L124 PetriNetUnfolderBase]: 4129/6226 cut-off events. [2024-06-14 12:11:31,672 INFO L125 PetriNetUnfolderBase]: For 1884871/1884873 co-relation queries the response was YES. [2024-06-14 12:11:31,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68038 conditions, 6226 events. 4129/6226 cut-off events. For 1884871/1884873 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 34147 event pairs, 817 based on Foata normal form. 2/6226 useless extension candidates. Maximal degree in co-relation 67837. Up to 5909 conditions per place. [2024-06-14 12:11:31,784 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 517 selfloop transitions, 63 changer transitions 0/583 dead transitions. [2024-06-14 12:11:31,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 583 transitions, 8168 flow [2024-06-14 12:11:31,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:11:31,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:11:31,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-14 12:11:31,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-14 12:11:31,785 INFO L175 Difference]: Start difference. First operand has 430 places, 535 transitions, 6024 flow. Second operand 11 states and 186 transitions. [2024-06-14 12:11:31,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 583 transitions, 8168 flow [2024-06-14 12:11:38,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 583 transitions, 7953 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-14 12:11:38,174 INFO L231 Difference]: Finished difference. Result has 430 places, 547 transitions, 6291 flow [2024-06-14 12:11:38,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5809, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6291, PETRI_PLACES=430, PETRI_TRANSITIONS=547} [2024-06-14 12:11:38,179 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-14 12:11:38,179 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 547 transitions, 6291 flow [2024-06-14 12:11:38,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:38,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:38,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:38,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 12:11:38,180 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:11:38,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:38,180 INFO L85 PathProgramCache]: Analyzing trace with hash -860995574, now seen corresponding path program 5 times [2024-06-14 12:11:38,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:38,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367682626] [2024-06-14 12:11:38,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:38,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:38,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:39,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:39,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:39,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367682626] [2024-06-14 12:11:39,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367682626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:39,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:39,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:39,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998171842] [2024-06-14 12:11:39,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:39,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:39,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:39,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:39,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:39,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:11:39,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 547 transitions, 6291 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:39,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:39,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:11:39,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:41,063 INFO L124 PetriNetUnfolderBase]: 4123/6218 cut-off events. [2024-06-14 12:11:41,064 INFO L125 PetriNetUnfolderBase]: For 1898946/1898948 co-relation queries the response was YES. [2024-06-14 12:11:41,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68106 conditions, 6218 events. 4123/6218 cut-off events. For 1898946/1898948 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 34058 event pairs, 820 based on Foata normal form. 2/6218 useless extension candidates. Maximal degree in co-relation 67904. Up to 5904 conditions per place. [2024-06-14 12:11:41,158 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 510 selfloop transitions, 62 changer transitions 0/575 dead transitions. [2024-06-14 12:11:41,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 575 transitions, 7787 flow [2024-06-14 12:11:41,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:41,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:41,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 12:11:41,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-14 12:11:41,159 INFO L175 Difference]: Start difference. First operand has 430 places, 547 transitions, 6291 flow. Second operand 9 states and 156 transitions. [2024-06-14 12:11:41,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 575 transitions, 7787 flow [2024-06-14 12:11:48,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 575 transitions, 7486 flow, removed 122 selfloop flow, removed 5 redundant places. [2024-06-14 12:11:48,367 INFO L231 Difference]: Finished difference. Result has 434 places, 547 transitions, 6120 flow [2024-06-14 12:11:48,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5990, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6120, PETRI_PLACES=434, PETRI_TRANSITIONS=547} [2024-06-14 12:11:48,368 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-14 12:11:48,368 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 547 transitions, 6120 flow [2024-06-14 12:11:48,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:48,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:48,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:48,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 12:11:48,369 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:11:48,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:48,369 INFO L85 PathProgramCache]: Analyzing trace with hash -866656484, now seen corresponding path program 6 times [2024-06-14 12:11:48,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:48,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453924380] [2024-06-14 12:11:48,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:48,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:48,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:49,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:49,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:49,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453924380] [2024-06-14 12:11:49,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453924380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:49,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:49,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:49,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011071877] [2024-06-14 12:11:49,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:49,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:49,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:49,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:49,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:49,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:11:49,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 547 transitions, 6120 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:49,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:49,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:11:49,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:51,137 INFO L124 PetriNetUnfolderBase]: 4117/6210 cut-off events. [2024-06-14 12:11:51,137 INFO L125 PetriNetUnfolderBase]: For 1904756/1904758 co-relation queries the response was YES. [2024-06-14 12:11:51,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67764 conditions, 6210 events. 4117/6210 cut-off events. For 1904756/1904758 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 34030 event pairs, 815 based on Foata normal form. 2/6210 useless extension candidates. Maximal degree in co-relation 67560. Up to 5931 conditions per place. [2024-06-14 12:11:51,237 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 525 selfloop transitions, 50 changer transitions 0/578 dead transitions. [2024-06-14 12:11:51,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 578 transitions, 7368 flow [2024-06-14 12:11:51,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:51,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:51,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 12:11:51,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-14 12:11:51,239 INFO L175 Difference]: Start difference. First operand has 434 places, 547 transitions, 6120 flow. Second operand 9 states and 159 transitions. [2024-06-14 12:11:51,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 578 transitions, 7368 flow [2024-06-14 12:11:56,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 578 transitions, 7208 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-14 12:11:56,510 INFO L231 Difference]: Finished difference. Result has 435 places, 547 transitions, 6066 flow [2024-06-14 12:11:56,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5960, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6066, PETRI_PLACES=435, PETRI_TRANSITIONS=547} [2024-06-14 12:11:56,524 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-14 12:11:56,524 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 547 transitions, 6066 flow [2024-06-14 12:11:56,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:56,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:56,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:56,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 12:11:56,525 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:11:56,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:56,525 INFO L85 PathProgramCache]: Analyzing trace with hash -866805439, now seen corresponding path program 3 times [2024-06-14 12:11:56,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:56,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606125583] [2024-06-14 12:11:56,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:56,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:57,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:57,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:57,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606125583] [2024-06-14 12:11:57,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606125583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:57,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:57,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:57,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877430236] [2024-06-14 12:11:57,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:57,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:57,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:57,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:57,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:57,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:11:57,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 547 transitions, 6066 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:57,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:57,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:11:57,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:59,318 INFO L124 PetriNetUnfolderBase]: 4130/6228 cut-off events. [2024-06-14 12:11:59,318 INFO L125 PetriNetUnfolderBase]: For 1932714/1932716 co-relation queries the response was YES. [2024-06-14 12:11:59,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68240 conditions, 6228 events. 4130/6228 cut-off events. For 1932714/1932716 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 34142 event pairs, 908 based on Foata normal form. 3/6229 useless extension candidates. Maximal degree in co-relation 68035. Up to 6030 conditions per place. [2024-06-14 12:11:59,421 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 481 selfloop transitions, 98 changer transitions 0/582 dead transitions. [2024-06-14 12:11:59,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 582 transitions, 7730 flow [2024-06-14 12:11:59,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:59,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:59,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 12:11:59,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-14 12:11:59,423 INFO L175 Difference]: Start difference. First operand has 435 places, 547 transitions, 6066 flow. Second operand 9 states and 156 transitions. [2024-06-14 12:11:59,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 582 transitions, 7730 flow [2024-06-14 12:12:04,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 582 transitions, 7592 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-14 12:12:04,415 INFO L231 Difference]: Finished difference. Result has 437 places, 555 transitions, 6316 flow [2024-06-14 12:12:04,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5928, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6316, PETRI_PLACES=437, PETRI_TRANSITIONS=555} [2024-06-14 12:12:04,415 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-14 12:12:04,416 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 555 transitions, 6316 flow [2024-06-14 12:12:04,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:04,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:04,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:04,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 12:12:04,416 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:12:04,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:04,417 INFO L85 PathProgramCache]: Analyzing trace with hash 139387752, now seen corresponding path program 1 times [2024-06-14 12:12:04,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:04,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251533535] [2024-06-14 12:12:04,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:04,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:04,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:05,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:05,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:05,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251533535] [2024-06-14 12:12:05,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251533535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:05,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:05,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:12:05,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120718229] [2024-06-14 12:12:05,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:05,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:12:05,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:05,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:12:05,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:12:05,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:12:05,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 555 transitions, 6316 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:05,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:05,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:12:05,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:07,189 INFO L124 PetriNetUnfolderBase]: 4160/6270 cut-off events. [2024-06-14 12:12:07,190 INFO L125 PetriNetUnfolderBase]: For 2011525/2011527 co-relation queries the response was YES. [2024-06-14 12:12:07,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69320 conditions, 6270 events. 4160/6270 cut-off events. For 2011525/2011527 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 34398 event pairs, 836 based on Foata normal form. 6/6274 useless extension candidates. Maximal degree in co-relation 69113. Up to 6119 conditions per place. [2024-06-14 12:12:07,296 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 551 selfloop transitions, 33 changer transitions 0/587 dead transitions. [2024-06-14 12:12:07,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 587 transitions, 7678 flow [2024-06-14 12:12:07,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:12:07,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:12:07,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 12:12:07,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 12:12:07,297 INFO L175 Difference]: Start difference. First operand has 437 places, 555 transitions, 6316 flow. Second operand 9 states and 153 transitions. [2024-06-14 12:12:07,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 587 transitions, 7678 flow [2024-06-14 12:12:12,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 587 transitions, 7446 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-14 12:12:12,595 INFO L231 Difference]: Finished difference. Result has 441 places, 558 transitions, 6250 flow [2024-06-14 12:12:12,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6084, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6250, PETRI_PLACES=441, PETRI_TRANSITIONS=558} [2024-06-14 12:12:12,596 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-14 12:12:12,596 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 558 transitions, 6250 flow [2024-06-14 12:12:12,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:12,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:12,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:12,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 12:12:12,596 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:12:12,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:12,597 INFO L85 PathProgramCache]: Analyzing trace with hash 2012946549, now seen corresponding path program 4 times [2024-06-14 12:12:12,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:12,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943305712] [2024-06-14 12:12:12,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:12,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:12,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:13,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:13,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:13,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943305712] [2024-06-14 12:12:13,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943305712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:13,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:13,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:12:13,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321655437] [2024-06-14 12:12:13,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:13,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:12:13,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:13,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:12:13,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:12:13,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:12:13,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 558 transitions, 6250 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:13,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:13,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:12:13,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:15,521 INFO L124 PetriNetUnfolderBase]: 4165/6277 cut-off events. [2024-06-14 12:12:15,521 INFO L125 PetriNetUnfolderBase]: For 1992336/1992338 co-relation queries the response was YES. [2024-06-14 12:12:15,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69851 conditions, 6277 events. 4165/6277 cut-off events. For 1992336/1992338 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 34408 event pairs, 912 based on Foata normal form. 3/6278 useless extension candidates. Maximal degree in co-relation 69642. Up to 6098 conditions per place. [2024-06-14 12:12:15,631 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 487 selfloop transitions, 94 changer transitions 0/584 dead transitions. [2024-06-14 12:12:15,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 584 transitions, 7507 flow [2024-06-14 12:12:15,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:12:15,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:12:15,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 12:12:15,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-14 12:12:15,633 INFO L175 Difference]: Start difference. First operand has 441 places, 558 transitions, 6250 flow. Second operand 9 states and 151 transitions. [2024-06-14 12:12:15,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 584 transitions, 7507 flow [2024-06-14 12:12:22,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 584 transitions, 7363 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-14 12:12:22,698 INFO L231 Difference]: Finished difference. Result has 443 places, 561 transitions, 6341 flow [2024-06-14 12:12:22,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6106, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6341, PETRI_PLACES=443, PETRI_TRANSITIONS=561} [2024-06-14 12:12:22,699 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-14 12:12:22,699 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 561 transitions, 6341 flow [2024-06-14 12:12:22,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:22,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:22,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:22,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 12:12:22,700 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:12:22,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:22,700 INFO L85 PathProgramCache]: Analyzing trace with hash -866536328, now seen corresponding path program 4 times [2024-06-14 12:12:22,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:22,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341159728] [2024-06-14 12:12:22,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:22,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:22,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:23,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:23,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:23,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341159728] [2024-06-14 12:12:23,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341159728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:23,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:23,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:12:23,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96370129] [2024-06-14 12:12:23,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:23,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:12:23,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:23,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:12:23,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:12:23,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:12:23,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 561 transitions, 6341 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:23,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:23,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:12:23,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:25,517 INFO L124 PetriNetUnfolderBase]: 4220/6353 cut-off events. [2024-06-14 12:12:25,517 INFO L125 PetriNetUnfolderBase]: For 2087760/2087762 co-relation queries the response was YES. [2024-06-14 12:12:25,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71382 conditions, 6353 events. 4220/6353 cut-off events. For 2087760/2087762 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 34801 event pairs, 891 based on Foata normal form. 5/6356 useless extension candidates. Maximal degree in co-relation 71172. Up to 5756 conditions per place. [2024-06-14 12:12:25,635 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 439 selfloop transitions, 162 changer transitions 0/604 dead transitions. [2024-06-14 12:12:25,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 604 transitions, 8765 flow [2024-06-14 12:12:25,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:12:25,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:12:25,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:12:25,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-14 12:12:25,636 INFO L175 Difference]: Start difference. First operand has 443 places, 561 transitions, 6341 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:12:25,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 604 transitions, 8765 flow [2024-06-14 12:12:32,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 604 transitions, 8561 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 12:12:32,675 INFO L231 Difference]: Finished difference. Result has 445 places, 570 transitions, 6713 flow [2024-06-14 12:12:32,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6137, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6713, PETRI_PLACES=445, PETRI_TRANSITIONS=570} [2024-06-14 12:12:32,676 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 402 predicate places. [2024-06-14 12:12:32,676 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 570 transitions, 6713 flow [2024-06-14 12:12:32,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:32,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:32,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:32,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 12:12:32,677 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:12:32,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:32,677 INFO L85 PathProgramCache]: Analyzing trace with hash 139208820, now seen corresponding path program 7 times [2024-06-14 12:12:32,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:32,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983569744] [2024-06-14 12:12:32,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:32,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:32,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:33,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:33,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:33,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983569744] [2024-06-14 12:12:33,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983569744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:33,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:33,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:12:33,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176273479] [2024-06-14 12:12:33,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:33,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:12:33,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:33,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:12:33,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:12:33,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:12:33,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 570 transitions, 6713 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:33,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:33,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:12:33,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:35,655 INFO L124 PetriNetUnfolderBase]: 4254/6400 cut-off events. [2024-06-14 12:12:35,656 INFO L125 PetriNetUnfolderBase]: For 2144338/2144340 co-relation queries the response was YES. [2024-06-14 12:12:35,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73391 conditions, 6400 events. 4254/6400 cut-off events. For 2144338/2144340 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 35078 event pairs, 844 based on Foata normal form. 2/6400 useless extension candidates. Maximal degree in co-relation 73180. Up to 5823 conditions per place. [2024-06-14 12:12:35,768 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 456 selfloop transitions, 151 changer transitions 0/610 dead transitions. [2024-06-14 12:12:35,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 610 transitions, 9211 flow [2024-06-14 12:12:35,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:12:35,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:12:35,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 12:12:35,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-14 12:12:35,770 INFO L175 Difference]: Start difference. First operand has 445 places, 570 transitions, 6713 flow. Second operand 9 states and 164 transitions. [2024-06-14 12:12:35,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 610 transitions, 9211 flow [2024-06-14 12:12:44,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 610 transitions, 8974 flow, removed 70 selfloop flow, removed 4 redundant places. [2024-06-14 12:12:44,953 INFO L231 Difference]: Finished difference. Result has 450 places, 579 transitions, 7144 flow [2024-06-14 12:12:44,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6482, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7144, PETRI_PLACES=450, PETRI_TRANSITIONS=579} [2024-06-14 12:12:44,954 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-14 12:12:44,954 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 579 transitions, 7144 flow [2024-06-14 12:12:44,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:44,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:44,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:44,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 12:12:44,955 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:12:44,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:44,956 INFO L85 PathProgramCache]: Analyzing trace with hash -857270738, now seen corresponding path program 5 times [2024-06-14 12:12:44,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:44,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872954001] [2024-06-14 12:12:44,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:44,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:44,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:45,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:45,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:45,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872954001] [2024-06-14 12:12:45,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872954001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:45,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:45,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:12:45,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864920524] [2024-06-14 12:12:45,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:45,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:12:45,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:45,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:12:45,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:12:45,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:12:45,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 579 transitions, 7144 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:45,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:45,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:12:45,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:47,769 INFO L124 PetriNetUnfolderBase]: 4293/6454 cut-off events. [2024-06-14 12:12:47,770 INFO L125 PetriNetUnfolderBase]: For 2214172/2214174 co-relation queries the response was YES. [2024-06-14 12:12:47,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74468 conditions, 6454 events. 4293/6454 cut-off events. For 2214172/2214174 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 35396 event pairs, 892 based on Foata normal form. 5/6457 useless extension candidates. Maximal degree in co-relation 74255. Up to 5838 conditions per place. [2024-06-14 12:12:47,888 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 449 selfloop transitions, 164 changer transitions 0/616 dead transitions. [2024-06-14 12:12:47,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 616 transitions, 9444 flow [2024-06-14 12:12:47,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:12:47,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:12:47,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 12:12:47,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-14 12:12:47,889 INFO L175 Difference]: Start difference. First operand has 450 places, 579 transitions, 7144 flow. Second operand 9 states and 163 transitions. [2024-06-14 12:12:47,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 616 transitions, 9444 flow [2024-06-14 12:12:58,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 616 transitions, 9196 flow, removed 81 selfloop flow, removed 4 redundant places. [2024-06-14 12:12:58,088 INFO L231 Difference]: Finished difference. Result has 455 places, 585 transitions, 7318 flow [2024-06-14 12:12:58,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6896, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7318, PETRI_PLACES=455, PETRI_TRANSITIONS=585} [2024-06-14 12:12:58,089 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 412 predicate places. [2024-06-14 12:12:58,089 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 585 transitions, 7318 flow [2024-06-14 12:12:58,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:58,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:58,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:58,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 12:12:58,090 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:12:58,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:58,090 INFO L85 PathProgramCache]: Analyzing trace with hash 139525950, now seen corresponding path program 8 times [2024-06-14 12:12:58,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:58,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036795744] [2024-06-14 12:12:58,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:58,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:58,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:58,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:58,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036795744] [2024-06-14 12:12:58,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036795744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:58,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:58,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:12:58,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258722069] [2024-06-14 12:12:58,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:58,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:12:58,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:58,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:12:58,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:12:59,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:12:59,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 585 transitions, 7318 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:59,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:59,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:12:59,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:01,023 INFO L124 PetriNetUnfolderBase]: 4319/6490 cut-off events. [2024-06-14 12:13:01,023 INFO L125 PetriNetUnfolderBase]: For 2253606/2253608 co-relation queries the response was YES. [2024-06-14 12:13:01,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75578 conditions, 6490 events. 4319/6490 cut-off events. For 2253606/2253608 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 35633 event pairs, 861 based on Foata normal form. 2/6490 useless extension candidates. Maximal degree in co-relation 75363. Up to 5902 conditions per place. [2024-06-14 12:13:01,127 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 461 selfloop transitions, 155 changer transitions 0/619 dead transitions. [2024-06-14 12:13:01,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 619 transitions, 9644 flow [2024-06-14 12:13:01,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:13:01,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:13:01,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:13:01,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-14 12:13:01,129 INFO L175 Difference]: Start difference. First operand has 455 places, 585 transitions, 7318 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:13:01,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 619 transitions, 9644 flow [2024-06-14 12:13:09,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 619 transitions, 9356 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 12:13:09,248 INFO L231 Difference]: Finished difference. Result has 459 places, 591 transitions, 7506 flow [2024-06-14 12:13:09,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7030, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7506, PETRI_PLACES=459, PETRI_TRANSITIONS=591} [2024-06-14 12:13:09,249 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 416 predicate places. [2024-06-14 12:13:09,249 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 591 transitions, 7506 flow [2024-06-14 12:13:09,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:09,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:09,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:09,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 12:13:09,250 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:13:09,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:09,250 INFO L85 PathProgramCache]: Analyzing trace with hash -857282239, now seen corresponding path program 5 times [2024-06-14 12:13:09,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:09,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681777840] [2024-06-14 12:13:09,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:09,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:09,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:10,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:10,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:10,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681777840] [2024-06-14 12:13:10,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681777840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:10,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:10,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:13:10,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873048503] [2024-06-14 12:13:10,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:10,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:13:10,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:10,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:13:10,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:13:10,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:13:10,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 591 transitions, 7506 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:10,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:10,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:13:10,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:12,084 INFO L124 PetriNetUnfolderBase]: 4324/6497 cut-off events. [2024-06-14 12:13:12,084 INFO L125 PetriNetUnfolderBase]: For 2274184/2274186 co-relation queries the response was YES. [2024-06-14 12:13:12,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75758 conditions, 6497 events. 4324/6497 cut-off events. For 2274184/2274186 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 35682 event pairs, 943 based on Foata normal form. 3/6498 useless extension candidates. Maximal degree in co-relation 75542. Up to 6318 conditions per place. [2024-06-14 12:13:12,204 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 518 selfloop transitions, 93 changer transitions 0/614 dead transitions. [2024-06-14 12:13:12,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 614 transitions, 8821 flow [2024-06-14 12:13:12,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:13:12,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:13:12,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 12:13:12,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-14 12:13:12,205 INFO L175 Difference]: Start difference. First operand has 459 places, 591 transitions, 7506 flow. Second operand 9 states and 148 transitions. [2024-06-14 12:13:12,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 614 transitions, 8821 flow [2024-06-14 12:13:20,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 614 transitions, 8501 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-14 12:13:20,980 INFO L231 Difference]: Finished difference. Result has 463 places, 594 transitions, 7425 flow [2024-06-14 12:13:20,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7186, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7425, PETRI_PLACES=463, PETRI_TRANSITIONS=594} [2024-06-14 12:13:20,980 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 420 predicate places. [2024-06-14 12:13:20,980 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 594 transitions, 7425 flow [2024-06-14 12:13:20,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:20,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:20,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:20,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 12:13:20,981 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:13:20,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:20,981 INFO L85 PathProgramCache]: Analyzing trace with hash -857281898, now seen corresponding path program 6 times [2024-06-14 12:13:20,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:20,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074056161] [2024-06-14 12:13:20,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:20,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:21,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:21,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074056161] [2024-06-14 12:13:21,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074056161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:21,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:21,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:13:21,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425812918] [2024-06-14 12:13:21,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:21,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:13:21,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:21,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:13:21,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:13:21,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:13:21,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 594 transitions, 7425 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:21,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:21,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:13:21,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:23,841 INFO L124 PetriNetUnfolderBase]: 4315/6485 cut-off events. [2024-06-14 12:13:23,841 INFO L125 PetriNetUnfolderBase]: For 2293311/2293313 co-relation queries the response was YES. [2024-06-14 12:13:23,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75134 conditions, 6485 events. 4315/6485 cut-off events. For 2293311/2293313 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 35628 event pairs, 905 based on Foata normal form. 5/6488 useless extension candidates. Maximal degree in co-relation 74917. Up to 5874 conditions per place. [2024-06-14 12:13:24,010 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 461 selfloop transitions, 162 changer transitions 0/626 dead transitions. [2024-06-14 12:13:24,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 626 transitions, 9409 flow [2024-06-14 12:13:24,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:13:24,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:13:24,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:13:24,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-14 12:13:24,011 INFO L175 Difference]: Start difference. First operand has 463 places, 594 transitions, 7425 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:13:24,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 626 transitions, 9409 flow [2024-06-14 12:13:32,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 626 transitions, 9181 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-14 12:13:32,414 INFO L231 Difference]: Finished difference. Result has 465 places, 594 transitions, 7527 flow [2024-06-14 12:13:32,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7197, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7527, PETRI_PLACES=465, PETRI_TRANSITIONS=594} [2024-06-14 12:13:32,415 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 422 predicate places. [2024-06-14 12:13:32,415 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 594 transitions, 7527 flow [2024-06-14 12:13:32,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:32,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:32,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:32,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 12:13:32,416 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:13:32,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:32,416 INFO L85 PathProgramCache]: Analyzing trace with hash -857270552, now seen corresponding path program 2 times [2024-06-14 12:13:32,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:32,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647187557] [2024-06-14 12:13:32,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:32,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:32,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:33,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:33,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:33,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647187557] [2024-06-14 12:13:33,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647187557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:33,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:33,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:13:33,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808594228] [2024-06-14 12:13:33,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:33,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:13:33,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:33,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:13:33,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:13:33,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:13:33,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 594 transitions, 7527 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:33,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:33,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:13:33,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:35,275 INFO L124 PetriNetUnfolderBase]: 4481/6714 cut-off events. [2024-06-14 12:13:35,275 INFO L125 PetriNetUnfolderBase]: For 2540744/2540746 co-relation queries the response was YES. [2024-06-14 12:13:35,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80471 conditions, 6714 events. 4481/6714 cut-off events. For 2540744/2540746 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 36881 event pairs, 867 based on Foata normal form. 6/6718 useless extension candidates. Maximal degree in co-relation 80253. Up to 6027 conditions per place. [2024-06-14 12:13:35,402 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 514 selfloop transitions, 134 changer transitions 0/651 dead transitions. [2024-06-14 12:13:35,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 651 transitions, 10306 flow [2024-06-14 12:13:35,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:13:35,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:13:35,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:13:35,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-14 12:13:35,405 INFO L175 Difference]: Start difference. First operand has 465 places, 594 transitions, 7527 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:13:35,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 651 transitions, 10306 flow [2024-06-14 12:13:46,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 651 transitions, 9970 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 12:13:46,518 INFO L231 Difference]: Finished difference. Result has 467 places, 614 transitions, 7956 flow [2024-06-14 12:13:46,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7191, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7956, PETRI_PLACES=467, PETRI_TRANSITIONS=614} [2024-06-14 12:13:46,519 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 424 predicate places. [2024-06-14 12:13:46,519 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 614 transitions, 7956 flow [2024-06-14 12:13:46,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:46,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:46,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:46,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 12:13:46,520 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:13:46,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:46,521 INFO L85 PathProgramCache]: Analyzing trace with hash -857276504, now seen corresponding path program 9 times [2024-06-14 12:13:46,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:46,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023726567] [2024-06-14 12:13:46,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:46,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:46,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:47,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:47,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:47,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023726567] [2024-06-14 12:13:47,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023726567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:47,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:47,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:13:47,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265372868] [2024-06-14 12:13:47,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:47,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:13:47,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:47,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:13:47,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:13:47,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:13:47,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 614 transitions, 7956 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:47,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:47,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:13:47,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:49,689 INFO L124 PetriNetUnfolderBase]: 4475/6706 cut-off events. [2024-06-14 12:13:49,690 INFO L125 PetriNetUnfolderBase]: For 2518863/2518865 co-relation queries the response was YES. [2024-06-14 12:13:49,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81335 conditions, 6706 events. 4475/6706 cut-off events. For 2518863/2518865 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 36796 event pairs, 872 based on Foata normal form. 2/6706 useless extension candidates. Maximal degree in co-relation 81115. Up to 6121 conditions per place. [2024-06-14 12:13:49,815 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 482 selfloop transitions, 156 changer transitions 0/641 dead transitions. [2024-06-14 12:13:49,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 641 transitions, 9908 flow [2024-06-14 12:13:49,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:13:49,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:13:49,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 12:13:49,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-14 12:13:49,817 INFO L175 Difference]: Start difference. First operand has 467 places, 614 transitions, 7956 flow. Second operand 9 states and 160 transitions. [2024-06-14 12:13:49,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 641 transitions, 9908 flow [2024-06-14 12:13:56,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 641 transitions, 9678 flow, removed 109 selfloop flow, removed 2 redundant places. [2024-06-14 12:13:56,388 INFO L231 Difference]: Finished difference. Result has 474 places, 614 transitions, 8044 flow [2024-06-14 12:13:56,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7726, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8044, PETRI_PLACES=474, PETRI_TRANSITIONS=614} [2024-06-14 12:13:56,397 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 431 predicate places. [2024-06-14 12:13:56,397 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 614 transitions, 8044 flow [2024-06-14 12:13:56,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:56,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:56,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:56,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 12:13:56,397 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:13:56,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:56,398 INFO L85 PathProgramCache]: Analyzing trace with hash -857276132, now seen corresponding path program 3 times [2024-06-14 12:13:56,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:56,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668524238] [2024-06-14 12:13:56,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:56,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:56,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:57,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:57,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:57,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668524238] [2024-06-14 12:13:57,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668524238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:57,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:57,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:13:57,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379632051] [2024-06-14 12:13:57,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:57,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:13:57,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:57,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:13:57,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:13:57,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:13:57,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 614 transitions, 8044 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:57,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:57,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:13:57,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:59,339 INFO L124 PetriNetUnfolderBase]: 4457/6682 cut-off events. [2024-06-14 12:13:59,339 INFO L125 PetriNetUnfolderBase]: For 2525440/2525442 co-relation queries the response was YES. [2024-06-14 12:13:59,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80249 conditions, 6682 events. 4457/6682 cut-off events. For 2525440/2525442 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 36636 event pairs, 883 based on Foata normal form. 6/6686 useless extension candidates. Maximal degree in co-relation 80026. Up to 6008 conditions per place. [2024-06-14 12:13:59,489 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 516 selfloop transitions, 133 changer transitions 0/652 dead transitions. [2024-06-14 12:13:59,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 652 transitions, 10147 flow [2024-06-14 12:13:59,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:13:59,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:13:59,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 12:13:59,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-14 12:13:59,490 INFO L175 Difference]: Start difference. First operand has 474 places, 614 transitions, 8044 flow. Second operand 9 states and 171 transitions. [2024-06-14 12:13:59,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 652 transitions, 10147 flow [2024-06-14 12:14:07,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 652 transitions, 9773 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-14 12:14:07,188 INFO L231 Difference]: Finished difference. Result has 475 places, 614 transitions, 7942 flow [2024-06-14 12:14:07,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7670, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7942, PETRI_PLACES=475, PETRI_TRANSITIONS=614} [2024-06-14 12:14:07,189 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-14 12:14:07,189 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 614 transitions, 7942 flow [2024-06-14 12:14:07,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:07,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:07,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:07,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 12:14:07,189 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:14:07,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:07,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1503767678, now seen corresponding path program 4 times [2024-06-14 12:14:07,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:07,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605365507] [2024-06-14 12:14:07,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:07,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:07,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:08,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:08,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:08,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605365507] [2024-06-14 12:14:08,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605365507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:08,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:08,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:14:08,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653629078] [2024-06-14 12:14:08,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:08,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:14:08,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:08,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:14:08,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:14:08,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:08,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 614 transitions, 7942 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:08,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:08,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:08,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:10,272 INFO L124 PetriNetUnfolderBase]: 4583/6856 cut-off events. [2024-06-14 12:14:10,272 INFO L125 PetriNetUnfolderBase]: For 2696570/2696572 co-relation queries the response was YES. [2024-06-14 12:14:10,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83957 conditions, 6856 events. 4583/6856 cut-off events. For 2696570/2696572 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 37682 event pairs, 906 based on Foata normal form. 6/6860 useless extension candidates. Maximal degree in co-relation 83733. Up to 6096 conditions per place. [2024-06-14 12:14:10,408 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 514 selfloop transitions, 141 changer transitions 0/658 dead transitions. [2024-06-14 12:14:10,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 658 transitions, 10611 flow [2024-06-14 12:14:10,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:14:10,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:14:10,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:14:10,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-14 12:14:10,410 INFO L175 Difference]: Start difference. First operand has 475 places, 614 transitions, 7942 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:14:10,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 658 transitions, 10611 flow [2024-06-14 12:14:19,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 658 transitions, 10345 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 12:14:19,716 INFO L231 Difference]: Finished difference. Result has 477 places, 623 transitions, 8234 flow [2024-06-14 12:14:19,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7688, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8234, PETRI_PLACES=477, PETRI_TRANSITIONS=623} [2024-06-14 12:14:19,717 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 434 predicate places. [2024-06-14 12:14:19,717 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 623 transitions, 8234 flow [2024-06-14 12:14:19,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:19,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:19,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:19,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 12:14:19,718 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:14:19,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:19,718 INFO L85 PathProgramCache]: Analyzing trace with hash 338833320, now seen corresponding path program 10 times [2024-06-14 12:14:19,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:19,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460267761] [2024-06-14 12:14:19,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:19,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:19,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:20,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:20,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460267761] [2024-06-14 12:14:20,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460267761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:20,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:20,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:14:20,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240833088] [2024-06-14 12:14:20,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:20,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:14:20,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:20,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:14:20,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:14:20,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:20,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 623 transitions, 8234 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:20,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:20,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:20,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:22,734 INFO L124 PetriNetUnfolderBase]: 4641/6936 cut-off events. [2024-06-14 12:14:22,734 INFO L125 PetriNetUnfolderBase]: For 2758291/2758293 co-relation queries the response was YES. [2024-06-14 12:14:22,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86001 conditions, 6936 events. 4641/6936 cut-off events. For 2758291/2758293 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 38188 event pairs, 883 based on Foata normal form. 2/6936 useless extension candidates. Maximal degree in co-relation 85776. Up to 6326 conditions per place. [2024-06-14 12:14:22,880 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 484 selfloop transitions, 172 changer transitions 0/659 dead transitions. [2024-06-14 12:14:22,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 659 transitions, 10872 flow [2024-06-14 12:14:22,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:14:22,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:14:22,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 12:14:22,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-14 12:14:22,882 INFO L175 Difference]: Start difference. First operand has 477 places, 623 transitions, 8234 flow. Second operand 9 states and 156 transitions. [2024-06-14 12:14:22,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 659 transitions, 10872 flow [2024-06-14 12:14:31,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 659 transitions, 10627 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-14 12:14:31,795 INFO L231 Difference]: Finished difference. Result has 482 places, 635 transitions, 8695 flow [2024-06-14 12:14:31,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7989, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8695, PETRI_PLACES=482, PETRI_TRANSITIONS=635} [2024-06-14 12:14:31,795 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 439 predicate places. [2024-06-14 12:14:31,796 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 635 transitions, 8695 flow [2024-06-14 12:14:31,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:31,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:31,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:31,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 12:14:31,796 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:14:31,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:31,797 INFO L85 PathProgramCache]: Analyzing trace with hash 335108856, now seen corresponding path program 7 times [2024-06-14 12:14:31,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:31,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392386856] [2024-06-14 12:14:31,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:31,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:31,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:32,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:32,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:32,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392386856] [2024-06-14 12:14:32,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392386856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:32,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:32,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:14:32,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848432443] [2024-06-14 12:14:32,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:32,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:14:32,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:32,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:14:32,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:14:32,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:32,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 635 transitions, 8695 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:32,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:32,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:32,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:35,182 INFO L124 PetriNetUnfolderBase]: 4680/6989 cut-off events. [2024-06-14 12:14:35,183 INFO L125 PetriNetUnfolderBase]: For 2837313/2837313 co-relation queries the response was YES. [2024-06-14 12:14:35,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86734 conditions, 6989 events. 4680/6989 cut-off events. For 2837313/2837313 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 38515 event pairs, 953 based on Foata normal form. 3/6990 useless extension candidates. Maximal degree in co-relation 86508. Up to 6796 conditions per place. [2024-06-14 12:14:35,328 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 597 selfloop transitions, 68 changer transitions 0/668 dead transitions. [2024-06-14 12:14:35,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 668 transitions, 10565 flow [2024-06-14 12:14:35,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:14:35,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:14:35,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 12:14:35,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-14 12:14:35,330 INFO L175 Difference]: Start difference. First operand has 482 places, 635 transitions, 8695 flow. Second operand 9 states and 157 transitions. [2024-06-14 12:14:35,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 668 transitions, 10565 flow [2024-06-14 12:14:45,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 668 transitions, 10274 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-14 12:14:45,269 INFO L231 Difference]: Finished difference. Result has 487 places, 641 transitions, 8648 flow [2024-06-14 12:14:45,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8404, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8648, PETRI_PLACES=487, PETRI_TRANSITIONS=641} [2024-06-14 12:14:45,269 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 444 predicate places. [2024-06-14 12:14:45,270 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 641 transitions, 8648 flow [2024-06-14 12:14:45,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:45,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:45,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:45,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 12:14:45,270 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:14:45,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:45,270 INFO L85 PathProgramCache]: Analyzing trace with hash 338827926, now seen corresponding path program 8 times [2024-06-14 12:14:45,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:45,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256227228] [2024-06-14 12:14:45,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:45,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:45,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:46,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:46,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:46,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256227228] [2024-06-14 12:14:46,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256227228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:46,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:46,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:14:46,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419089583] [2024-06-14 12:14:46,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:46,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:14:46,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:46,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:14:46,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:14:46,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:46,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 641 transitions, 8648 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:46,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:46,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:46,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:48,345 INFO L124 PetriNetUnfolderBase]: 4743/7077 cut-off events. [2024-06-14 12:14:48,346 INFO L125 PetriNetUnfolderBase]: For 2943555/2943557 co-relation queries the response was YES. [2024-06-14 12:14:48,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88157 conditions, 7077 events. 4743/7077 cut-off events. For 2943555/2943557 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 39040 event pairs, 963 based on Foata normal form. 5/7080 useless extension candidates. Maximal degree in co-relation 87930. Up to 6416 conditions per place. [2024-06-14 12:14:48,495 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 510 selfloop transitions, 168 changer transitions 0/681 dead transitions. [2024-06-14 12:14:48,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 681 transitions, 11544 flow [2024-06-14 12:14:48,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:14:48,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:14:48,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 12:14:48,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-14 12:14:48,497 INFO L175 Difference]: Start difference. First operand has 487 places, 641 transitions, 8648 flow. Second operand 9 states and 164 transitions. [2024-06-14 12:14:48,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 681 transitions, 11544 flow [2024-06-14 12:15:00,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 681 transitions, 11442 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 12:15:00,503 INFO L231 Difference]: Finished difference. Result has 491 places, 650 transitions, 9056 flow [2024-06-14 12:15:00,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8546, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9056, PETRI_PLACES=491, PETRI_TRANSITIONS=650} [2024-06-14 12:15:00,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 448 predicate places. [2024-06-14 12:15:00,504 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 650 transitions, 9056 flow [2024-06-14 12:15:00,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:00,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:00,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:00,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 12:15:00,505 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:00,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:00,505 INFO L85 PathProgramCache]: Analyzing trace with hash -558369382, now seen corresponding path program 9 times [2024-06-14 12:15:00,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:00,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881422304] [2024-06-14 12:15:00,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:00,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:00,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:01,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:01,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:01,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881422304] [2024-06-14 12:15:01,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881422304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:01,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:01,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:01,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260227215] [2024-06-14 12:15:01,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:01,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:01,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:01,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:01,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:01,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:01,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 650 transitions, 9056 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:01,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:01,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:01,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:03,906 INFO L124 PetriNetUnfolderBase]: 4758/7097 cut-off events. [2024-06-14 12:15:03,907 INFO L125 PetriNetUnfolderBase]: For 2982190/2982190 co-relation queries the response was YES. [2024-06-14 12:15:04,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89098 conditions, 7097 events. 4758/7097 cut-off events. For 2982190/2982190 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 39139 event pairs, 965 based on Foata normal form. 3/7098 useless extension candidates. Maximal degree in co-relation 88869. Up to 6927 conditions per place. [2024-06-14 12:15:04,046 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 610 selfloop transitions, 64 changer transitions 0/677 dead transitions. [2024-06-14 12:15:04,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 677 transitions, 10580 flow [2024-06-14 12:15:04,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:15:04,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:15:04,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 12:15:04,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-14 12:15:04,048 INFO L175 Difference]: Start difference. First operand has 491 places, 650 transitions, 9056 flow. Second operand 9 states and 152 transitions. [2024-06-14 12:15:04,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 677 transitions, 10580 flow [2024-06-14 12:15:16,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 677 transitions, 10333 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 12:15:16,549 INFO L231 Difference]: Finished difference. Result has 496 places, 653 transitions, 9005 flow [2024-06-14 12:15:16,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8815, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9005, PETRI_PLACES=496, PETRI_TRANSITIONS=653} [2024-06-14 12:15:16,549 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 453 predicate places. [2024-06-14 12:15:16,549 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 653 transitions, 9005 flow [2024-06-14 12:15:16,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:16,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:16,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:16,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 12:15:16,550 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:16,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:16,550 INFO L85 PathProgramCache]: Analyzing trace with hash 989023986, now seen corresponding path program 5 times [2024-06-14 12:15:16,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:16,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334547301] [2024-06-14 12:15:16,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:16,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:16,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:17,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:17,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:17,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334547301] [2024-06-14 12:15:17,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334547301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:17,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:17,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:17,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829586293] [2024-06-14 12:15:17,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:17,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:17,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:17,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:17,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:17,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:17,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 653 transitions, 9005 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:17,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:17,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:17,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:20,163 INFO L124 PetriNetUnfolderBase]: 4788/7140 cut-off events. [2024-06-14 12:15:20,163 INFO L125 PetriNetUnfolderBase]: For 3055933/3055935 co-relation queries the response was YES. [2024-06-14 12:15:20,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89219 conditions, 7140 events. 4788/7140 cut-off events. For 3055933/3055935 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 39408 event pairs, 893 based on Foata normal form. 6/7144 useless extension candidates. Maximal degree in co-relation 88989. Up to 6360 conditions per place. [2024-06-14 12:15:20,293 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 535 selfloop transitions, 150 changer transitions 0/688 dead transitions. [2024-06-14 12:15:20,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 688 transitions, 11234 flow [2024-06-14 12:15:20,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:15:20,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:15:20,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 12:15:20,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-14 12:15:20,295 INFO L175 Difference]: Start difference. First operand has 496 places, 653 transitions, 9005 flow. Second operand 9 states and 163 transitions. [2024-06-14 12:15:20,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 688 transitions, 11234 flow [2024-06-14 12:15:32,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 688 transitions, 11084 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 12:15:32,399 INFO L231 Difference]: Finished difference. Result has 498 places, 656 transitions, 9231 flow [2024-06-14 12:15:32,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8855, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9231, PETRI_PLACES=498, PETRI_TRANSITIONS=656} [2024-06-14 12:15:32,399 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 455 predicate places. [2024-06-14 12:15:32,399 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 656 transitions, 9231 flow [2024-06-14 12:15:32,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:32,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:32,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:32,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 12:15:32,400 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:32,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:32,400 INFO L85 PathProgramCache]: Analyzing trace with hash 338827585, now seen corresponding path program 6 times [2024-06-14 12:15:32,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:32,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466296439] [2024-06-14 12:15:32,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:32,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:33,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:33,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:33,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466296439] [2024-06-14 12:15:33,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466296439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:33,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:33,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:33,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452561999] [2024-06-14 12:15:33,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:33,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:33,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:33,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:33,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:33,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:33,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 656 transitions, 9231 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:33,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:33,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:33,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:36,243 INFO L124 PetriNetUnfolderBase]: 4793/7147 cut-off events. [2024-06-14 12:15:36,244 INFO L125 PetriNetUnfolderBase]: For 3038986/3038988 co-relation queries the response was YES. [2024-06-14 12:15:36,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89963 conditions, 7147 events. 4793/7147 cut-off events. For 3038986/3038988 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 39459 event pairs, 1024 based on Foata normal form. 3/7148 useless extension candidates. Maximal degree in co-relation 89732. Up to 6968 conditions per place. [2024-06-14 12:15:36,405 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 580 selfloop transitions, 93 changer transitions 0/676 dead transitions. [2024-06-14 12:15:36,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 676 transitions, 10668 flow [2024-06-14 12:15:36,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:15:36,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:15:36,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 12:15:36,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-14 12:15:36,406 INFO L175 Difference]: Start difference. First operand has 498 places, 656 transitions, 9231 flow. Second operand 9 states and 145 transitions. [2024-06-14 12:15:36,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 676 transitions, 10668 flow [2024-06-14 12:15:47,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 676 transitions, 10339 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:47,748 INFO L231 Difference]: Finished difference. Result has 501 places, 659 transitions, 9147 flow [2024-06-14 12:15:47,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8902, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9147, PETRI_PLACES=501, PETRI_TRANSITIONS=659} [2024-06-14 12:15:47,748 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 458 predicate places. [2024-06-14 12:15:47,748 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 659 transitions, 9147 flow [2024-06-14 12:15:47,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:47,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:47,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:47,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 12:15:47,749 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:47,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:47,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1069293342, now seen corresponding path program 10 times [2024-06-14 12:15:47,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:47,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138663465] [2024-06-14 12:15:47,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:47,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:48,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:48,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:48,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138663465] [2024-06-14 12:15:48,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138663465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:48,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:48,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:48,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422421347] [2024-06-14 12:15:48,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:48,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:48,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:48,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:48,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:48,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:48,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 659 transitions, 9147 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:48,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:48,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:48,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:51,365 INFO L124 PetriNetUnfolderBase]: 4808/7168 cut-off events. [2024-06-14 12:15:51,365 INFO L125 PetriNetUnfolderBase]: For 3095752/3095754 co-relation queries the response was YES. [2024-06-14 12:15:51,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89660 conditions, 7168 events. 4808/7168 cut-off events. For 3095752/3095754 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 39581 event pairs, 969 based on Foata normal form. 5/7171 useless extension candidates. Maximal degree in co-relation 89428. Up to 6493 conditions per place. [2024-06-14 12:15:51,545 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 505 selfloop transitions, 182 changer transitions 0/690 dead transitions. [2024-06-14 12:15:51,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 690 transitions, 11635 flow [2024-06-14 12:15:51,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:15:51,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:15:51,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 12:15:51,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-14 12:15:51,547 INFO L175 Difference]: Start difference. First operand has 501 places, 659 transitions, 9147 flow. Second operand 9 states and 160 transitions. [2024-06-14 12:15:51,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 690 transitions, 11635 flow [2024-06-14 12:16:03,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 690 transitions, 11421 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 12:16:03,443 INFO L231 Difference]: Finished difference. Result has 503 places, 662 transitions, 9347 flow [2024-06-14 12:16:03,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8933, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9347, PETRI_PLACES=503, PETRI_TRANSITIONS=662} [2024-06-14 12:16:03,444 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 460 predicate places. [2024-06-14 12:16:03,444 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 662 transitions, 9347 flow [2024-06-14 12:16:03,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:03,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:03,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:03,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 12:16:03,445 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:03,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:03,445 INFO L85 PathProgramCache]: Analyzing trace with hash 338839086, now seen corresponding path program 11 times [2024-06-14 12:16:03,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:03,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461800667] [2024-06-14 12:16:03,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:03,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:03,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:04,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:04,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:04,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461800667] [2024-06-14 12:16:04,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461800667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:04,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:04,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:16:04,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042337263] [2024-06-14 12:16:04,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:04,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:16:04,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:04,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:16:04,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:16:04,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:16:04,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 662 transitions, 9347 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:04,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:04,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:16:04,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:07,325 INFO L124 PetriNetUnfolderBase]: 4799/7156 cut-off events. [2024-06-14 12:16:07,325 INFO L125 PetriNetUnfolderBase]: For 3100677/3100679 co-relation queries the response was YES. [2024-06-14 12:16:07,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89781 conditions, 7156 events. 4799/7156 cut-off events. For 3100677/3100679 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 39514 event pairs, 955 based on Foata normal form. 5/7159 useless extension candidates. Maximal degree in co-relation 89548. Up to 6486 conditions per place. [2024-06-14 12:16:07,478 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 514 selfloop transitions, 175 changer transitions 0/692 dead transitions. [2024-06-14 12:16:07,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 692 transitions, 11825 flow [2024-06-14 12:16:07,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:16:07,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:16:07,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 12:16:07,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-14 12:16:07,480 INFO L175 Difference]: Start difference. First operand has 503 places, 662 transitions, 9347 flow. Second operand 9 states and 163 transitions. [2024-06-14 12:16:07,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 692 transitions, 11825 flow [2024-06-14 12:16:19,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 692 transitions, 11468 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-14 12:16:19,027 INFO L231 Difference]: Finished difference. Result has 507 places, 662 transitions, 9346 flow [2024-06-14 12:16:19,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8990, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9346, PETRI_PLACES=507, PETRI_TRANSITIONS=662} [2024-06-14 12:16:19,028 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 464 predicate places. [2024-06-14 12:16:19,028 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 662 transitions, 9346 flow [2024-06-14 12:16:19,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:19,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:19,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:19,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 12:16:19,029 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:19,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:19,029 INFO L85 PathProgramCache]: Analyzing trace with hash 977851369, now seen corresponding path program 7 times [2024-06-14 12:16:19,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:19,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000879824] [2024-06-14 12:16:19,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:19,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:20,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:20,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:20,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000879824] [2024-06-14 12:16:20,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000879824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:20,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:20,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:16:20,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232593163] [2024-06-14 12:16:20,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:20,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:16:20,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:20,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:16:20,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:16:20,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:16:20,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 662 transitions, 9346 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:20,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:20,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:16:20,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:23,461 INFO L124 PetriNetUnfolderBase]: 4804/7162 cut-off events. [2024-06-14 12:16:23,461 INFO L125 PetriNetUnfolderBase]: For 3115434/3115434 co-relation queries the response was YES. [2024-06-14 12:16:23,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89909 conditions, 7162 events. 4804/7162 cut-off events. For 3115434/3115434 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 39502 event pairs, 1031 based on Foata normal form. 1/7161 useless extension candidates. Maximal degree in co-relation 89675. Up to 7090 conditions per place. [2024-06-14 12:16:23,594 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 644 selfloop transitions, 36 changer transitions 0/683 dead transitions. [2024-06-14 12:16:23,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 683 transitions, 10790 flow [2024-06-14 12:16:23,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:16:23,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:16:23,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-14 12:16:23,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2024-06-14 12:16:23,595 INFO L175 Difference]: Start difference. First operand has 507 places, 662 transitions, 9346 flow. Second operand 10 states and 153 transitions. [2024-06-14 12:16:23,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 683 transitions, 10790 flow [2024-06-14 12:16:35,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 683 transitions, 10432 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 12:16:35,721 INFO L231 Difference]: Finished difference. Result has 509 places, 665 transitions, 9111 flow [2024-06-14 12:16:35,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8988, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9111, PETRI_PLACES=509, PETRI_TRANSITIONS=665} [2024-06-14 12:16:35,721 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 466 predicate places. [2024-06-14 12:16:35,722 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 665 transitions, 9111 flow [2024-06-14 12:16:35,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:35,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:35,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:35,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 12:16:35,722 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:35,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:35,723 INFO L85 PathProgramCache]: Analyzing trace with hash 981672336, now seen corresponding path program 6 times [2024-06-14 12:16:35,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:35,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365346084] [2024-06-14 12:16:35,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:35,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:35,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:36,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:36,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:36,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365346084] [2024-06-14 12:16:36,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365346084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:36,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:36,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:16:36,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582526152] [2024-06-14 12:16:36,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:36,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:16:36,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:36,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:16:36,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:16:36,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:16:36,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 665 transitions, 9111 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:36,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:36,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:16:36,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:39,448 INFO L124 PetriNetUnfolderBase]: 4786/7139 cut-off events. [2024-06-14 12:16:39,449 INFO L125 PetriNetUnfolderBase]: For 3137865/3137867 co-relation queries the response was YES. [2024-06-14 12:16:39,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88515 conditions, 7139 events. 4786/7139 cut-off events. For 3137865/3137867 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 39432 event pairs, 888 based on Foata normal form. 6/7143 useless extension candidates. Maximal degree in co-relation 88280. Up to 6372 conditions per place. [2024-06-14 12:16:39,583 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 554 selfloop transitions, 143 changer transitions 0/700 dead transitions. [2024-06-14 12:16:39,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 700 transitions, 11346 flow [2024-06-14 12:16:39,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:16:39,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:16:39,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:16:39,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:16:39,585 INFO L175 Difference]: Start difference. First operand has 509 places, 665 transitions, 9111 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:16:39,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 700 transitions, 11346 flow [2024-06-14 12:16:52,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 700 transitions, 11221 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-14 12:16:52,471 INFO L231 Difference]: Finished difference. Result has 511 places, 665 transitions, 9278 flow [2024-06-14 12:16:52,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8986, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9278, PETRI_PLACES=511, PETRI_TRANSITIONS=665} [2024-06-14 12:16:52,472 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 468 predicate places. [2024-06-14 12:16:52,472 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 665 transitions, 9278 flow [2024-06-14 12:16:52,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:52,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:52,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:52,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 12:16:52,473 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:52,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:52,473 INFO L85 PathProgramCache]: Analyzing trace with hash 977941734, now seen corresponding path program 11 times [2024-06-14 12:16:52,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:52,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908863077] [2024-06-14 12:16:52,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:52,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:53,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:53,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:53,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908863077] [2024-06-14 12:16:53,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908863077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:53,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:53,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:16:53,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604073338] [2024-06-14 12:16:53,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:53,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:16:53,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:53,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:16:53,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:16:53,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:16:53,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 665 transitions, 9278 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:53,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:53,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:16:53,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:56,080 INFO L124 PetriNetUnfolderBase]: 4780/7130 cut-off events. [2024-06-14 12:16:56,081 INFO L125 PetriNetUnfolderBase]: For 3104656/3104656 co-relation queries the response was YES. [2024-06-14 12:16:56,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88760 conditions, 7130 events. 4780/7130 cut-off events. For 3104656/3104656 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 39406 event pairs, 1018 based on Foata normal form. 2/7130 useless extension candidates. Maximal degree in co-relation 88524. Up to 7060 conditions per place. [2024-06-14 12:16:56,216 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 647 selfloop transitions, 33 changer transitions 0/683 dead transitions. [2024-06-14 12:16:56,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 683 transitions, 10690 flow [2024-06-14 12:16:56,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:16:56,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:16:56,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-14 12:16:56,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-14 12:16:56,217 INFO L175 Difference]: Start difference. First operand has 511 places, 665 transitions, 9278 flow. Second operand 9 states and 142 transitions. [2024-06-14 12:16:56,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 683 transitions, 10690 flow Killed by 15